Method of controlling gas-condensate field

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting gas-condensate fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a modular-sectional power functional hydropneumatic accumulator, linked through an actuating medium with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of a gas-condensate field, reduced cost and easier control of gas-condensate extraction processes.

25 cl, 3 dwg

 

The invention relates to the mining industry and can be used in the development of gas condensate field using remote, automatic and manual actuator control valve bodies wells gas condensate field.

The prior art method of well control using control devices downhole selectors group of wells containing a pneumatic unit, connected to the injection and discharge lines with hydraulic units by the number of wells, and one block contains the gearbox, relay, pump, tank, valve, relief valve, and the other block contains two valves, choke, the first isolating valve, and the device has a second isolating valve and the third valve (SU 1535970, E21B 34/16, 47/10, 15.01.1990).

Also there is a method of well control by the hydraulic control system for underwater wellhead containing hydraulic actuators associated primary and secondary pressure pipelines, highways management, solenoid valves and check valves, and installed at the inlet of the shut-off valves solenoid valves, check valve and additional raspredelitel is, which is located at the inlet shut-off valve on the main pressure line with connection of the latter with sink, and an additional check valve is placed in parallel with the valves and shut-off valve and connected to an input of a hydraulic actuator, and the output - input shutoff valve, with primary and secondary highways are interconnected by a bypass line control which is connected with the main highway (SU 1752930, E21B 33/035, 04.08.1992).

Also the prior art method of well control through a set of equipment for the management of estuarine surface valves subsea wells, comprising a main pressure line, an additional pressure line connected to the hydraulic actuators through the primary and secondary valves, line management, accumulators, connected with the primary and secondary pressure lines, pressure switches and check valves, and equipped with a host of pressure increasing chambers low and high pressure, when this line is connected with cameras low-pressure and main pressure line through the auxiliary valve and additional pressure line connected with cameras high the pressure and CSOs with the main pressure line through check valves, and on the site an additional pressure line between the check valve and the additional hydraulic accumulator in parallel installed a pressure switch associated with an additional valve (see SU 1733625, E21B 43/01, 15.05.1992).

The disadvantages of the known technical solutions is their relatively low reliability, do not provide the required level of safe operation of gas-condensate wells due to partial or complete lack of multivariate duplication systems that initiate, if necessary, rapid and automatic shutoff of the produced fluid, and enhance the reliability of the protection of wells and prevention in the early stages of potential emergencies managed by remote or manual disconnection of the wells. In addition, the lack of reliability of the known devices and systems management wells caused by the absence or complex and little functional decision mechanisms and systems, coherent closure of the shut-off bodies well, including in emergency situations. Other disadvantages of the known devices control wells are unresolved or insufficient provision of uninterrupted work well when disconnecting, including long-term supply of electricity to the mechanisms drives well Deposit or security, at least disposable include all mechanisms required for resuming operation of the well after it was deactivated.

The present invention is to improve reliability and trouble-free operation of the gas condensate field, reducing costs and simplifying management process gas condensate production.

The problem is solved due to the fact that on the way to perform well driven by the opening and closing of the shut-off bodies wellhead equipment - side and nadkarni valves and underground valve-stopping mechanism, as well as regulating the flow rate of the throttle valve, for which the well is connected to the completed structurally in the form of a case control station including a pump and an accumulator installation with pump group and is made mostly of a modular and sectional power functional hydropneumatic accumulator high pressure, reported on the working body with the line of the high pressure connecting them to the control unit; when this line is high pressure feeds the working body connected to it through lowering the pressure regulators the power line and functional management mentioned locking bodies and the throttle valve is supplied with each actuator and to control the last station, in addition, sasauth line logic control, which is connected through enables/disables the power pressure referred to the actuators of the valves to provide automatic completion of commands in the sequential closing side of the valve nadkarni valves underground valve-stopping mechanism, which on the areas of interaction line of logic control with power functional control lines actuators nadkarni valves and underground valve-stopping mechanism to the mentioned valves-pressure regulators connected control their moderators passing commands to the closing, each of which has a control hydropneumatic accumulator and adjusted to the preset deceleration of the expiration of the Manager of the hydropneumatic accumulator of the working fluid orifice, and the command to close is given primarily to the actuator side of the valve, then, with the specified deceleration to the actuator nadkarni valve, after which, with an additional set deceleration to the actuator underground valve-stopping mechanism and for actuating the specified command on the closing line logic control with a possibility of it control signal hydraulically connected with the control and governing bodies - the fusible link and the valve is m control high and low pressure, which is connected by a working body to their Manager of the discharge pressure at the specified line logic control triggering mechanism, in addition, the logical line control dublirovannoe provided with a similar trigger mechanism remote and manual process starts coherent mentioned closing of the shut-off bodies well.

Performance management station can determine the characteristics of the control pneumopericardium pressure and adjustable chokes are installed on the sites of interaction line of logic control with power lines functional control of actuators nadkarni valves and underground valve-stopping mechanism, and to pick up in such a way as to ensure trouble-free closure of the wells in the specified sequence.

Supplied to the power line and functional management of an underground valve-shut-off valve high pressure could be lower, passing through the pressure regulator to the level required for submission to sequentially mounted behind the intensifier, from which the working fluid enters the pressure necessary for appropriate management referred to the underground valve.

In this case, can produce duplicate individual p the x elements of the pump-and-accumulator installation in particular duplicate the work of the line "pump - pressure regulator - multiplier", in parallel across the input and output taps backup pair of pressure regulator - multiplier.

Spent working fluid when closing the hole can pass through the bypass drain line of the hydraulic system.

Monitoring compliance with safe operating temperatures at the wellhead and automatic closure of the borehole when their violation can be initiated and carried out through the use of hydraulic lines to destroy the fusible link, the melting of which through the mentioned trigger automatically reduce the pressure in line logic control and thus can enable automatic closing side, nadkarni valves and underground valve-stopping mechanism of gas condensate through the system slowing down, providing a coherent passage of a command signal to close to the actuators of the last two of them, at the same time a signal about the fire dispatcher at the Central control panel located at a distance from the station management and communicated with her line, such as fiber optic cable or radio channel.

Controlling the operating mode of the pressure on the well and closing the bore at the exit from the stage the valid range of the pressure can be accomplished through the use of hydraulic line valve control low and high pressure in the train, which is beyond the allowable range of the pressure automatically submits a command triggering mechanism line logic control, and through it provide automatic closure of wells in the mentioned sequence.

Remote electromagnetic signal for closing the wells can be served from a Central control panel located at a distance from the control station and reported her communication line, such as fiber optic cable or radio channel, and the Cabinet in which are mounted mentioned pump-and-accumulator installation and the control unit may perform a preferably stainless steel, in addition, the station can supply piping as mentioned power lines and functional management, reported on the working body with the Executive mechanisms of the locking bodies, throttle valve and an underground valve-stopping mechanism.

In the Cabinet can maintain the temperature that ensures smooth functioning of all located in it elements and systems.

Wardrobe management station can perform insulated and explosion, and the connection cable lines to the Cabinet can be made through cable outlets in explosion-proof version.

As a working body can use liquid selected temperature viscosity and temperature is round freezing climatic conditions of the well, the control station is designed for operation in the third and fourth climatic zones, as a working body can be equipped with a predominantly mineral oil, and for the first and second climatic zones as a working body can take liquid with a low freezing point mainly type silicon, for example polymethylsiloxanes, while the working fluid is mainly supplied from the tank, installed in pump-and-accumulator installation, which is equipped with at least one level indicator filling liquid, such as a visual indicator or a level sensor provided in the channels of telemetry to a Central control panel located at a distance from the control station and communicated with her line, such as fiber optic cable or radio channel, it is possible to apply the level sensor is equipped with a signal system on the maximum allowable and critical levels, or connected to the Central control unit issuing a command for maintaining the liquid level in the tank within predetermined limits, and for the first and second climatic zones of the tank of the working fluid can be supplied with fluid heater, made in the form of a coil or heating element.

Pump group can be equipped with at least one pump, mainly electrons the som high pressure, preferably the axial-piston with asynchronous motor is doubled for the first and second climatic zones, at least one additional parallel connected electric pump high pressure, and the specified pump or pumps include in-line high pressure through the input and output filters preferably coarse and fine cleaning, respectively, and each of these pumps outlet equipped with safety valve and pressure mounted to selectively disconnect the high pressure line through a system of locking devices, and at least installed on the output filters provide a visual indicator and/or electrical sensor in communication with the Central the panel placed at a distance from the control station and reported her communication line, such as fiber optic cable or radio channel, while pumping group, provided at the output devices start or stop motors, pumps and non-return valve, reported through the last line of high pressure modular sectional power functional hydropneumatic accumulator, consisting of parallel connected to the collector modules and designed to create the necessary working pressure in the above-mentioned forces the o-line and functional management, thus the collector of the power functional hydropneumatic accumulator report on the working body with high line pressure, in addition, these devices start or stop a motor pump connected to the high pressure line, is performed, for example, in the form of a pressure switch, or in the form of analog pressure sensors, either in the form of electric contact pressure gauges, and the modules mentioned functional power of the hydropneumatic accumulator perform with diaphragm or piston preferably the separator environments, while the total working volume of all modules of the functional power of the hydropneumatic accumulator shall not be less than required for a single opening of the shut-off bodies bore, a throttle valve and an underground valve-stopping mechanism when disabled the supply of electricity or to maintain the operating condition of the well for a period of not less than one month in the absence of electricity.

Pressure regulators can reduce the pressure from the functional 10-100 MPa to working from 0.5 to 70 MPa in the power lines of functional control of actuators nadkarni, side valve, throttle valve and in-line logic control, including the line of control valve high and low pressure and a fuse, and a pressure regulator in the power line F. the purpose ground receiving stations control actuator underground valve-stopping mechanism set up by the flow of the working fluid in the subsequently installed behind the multiplier with the gear and last the desired output pressure of the working fluid is not less 21-70 MPa for subsequent delivery and management of the Executive mechanism of the underground valve-stopping mechanism, all power line and functional management supply installed in areas in front of actuators safety valves pressure.

The control unit can be equipped with automatic protection system wells in remote and manual off well, with automatic protection system includes connected to line logic control through the mentioned triggers line fuse and line control valve high and low pressure, the valve control low and high pressure are placed in the area adjacent to the wellhead, preferably on the train, and the line of control valve high and low pressure and a fuse provided with a relay or pressure sensors with signal about disabling wells, respectively, by fire, or by reason of outside the range of operating pressures established by the setting of control valve high and low pressure on the Central control panel located at a distance from the control station and reported her communication line, such as fiber optic cable is or radio channel.

Line logic control can be connected in series on the working body through the distribution valve to maintain a logical sequence of well control and valves-valves with power lines functional control of actuators, including, at least, underground valve-stopping mechanism, nadkarni and side valves are valid close to some, namely in the opposite sequence with adjustable set valid time intervals between outages of each of them, for which on-line logic control install these control pneumohydroaccumulators with the possibility of their interaction on the pressure relief each with its throttle, while managing the hydropneumatic accumulator on the site of interaction with the power line and functional management of the Executive mechanism of the underground valve-stopping mechanism set up by the slow closing of the underground valve-stopping mechanism at the time, 1.5-2 times the interval between closing nadkarni valve and the side of the valve, comprising from 10 to 120 C.

On line logic control at the site of its supply to the power line and functional management Executive mechanism side Nedvizhimost to install the solenoid valve remote switching on and off of the side of the valve.

Power line functional control actuator throttle valve can provide three-position valve preferably with two electromagnets.

Distribution valves of all power lines functional control of actuators can be connected to the bypass drain line to discharge the spent working fluid, while the bypass drain line reported mainly through the filter to the tank of a working body established in pump-and-accumulator installation.

On power lines functional actuator control valve bodies, throttle valve, underground valve-stopping mechanism can set the temperature relief valves, skommutirovany output with bypass drain line to clear excess working fluid released when the temperature of the working fluid and/or the environment.

Pump-and-accumulator installation can be performed mainly with the remote front panel.

Shut-off bodies, throttle valve and an underground shutoff valve can be provided with control devices located on the front panel of the control unit.

Management triggers line logic control can be implemented in remote mode according to which the commands of the remote operator, for example, the Manager of the Central control panel located at a distance from the control station and reported her communication line, such as fiber optic cable or radio channel.

Monitoring the level of pressure in the arteries of the control station can perform automatically, including using electric contact pressure gauges.

The work program of the control unit can be configured so that, in the absence of the supply voltage for the elements station shut-off elements wellhead valves remain open, and the control unit transmits the signal about the absence of voltage on the Central control console.

The possibility of closing the hole in the sequence "side valve - nazarena valve - underground shutoff valve" can provide in an automatic mode according to the commands of the remote control station, remote control mode by the operator with remote control and manual mode, and the opening sequence of "underground shutoff valve - nazarena valve - side valve may preferably provide in the manual control mode.

The technical result provided by the present set of features is to improve reliability and trouble-free operation condensate months is rojdeniya, reducing the cost of production of gas condensate, simplification of process control through automated control shut-off bodies bore - side and nadkarni valves, regulating the flow rate of the throttle valve, an underground valve, through the control station, which has developed in the invention of a pump and accumulator installation with power hydropneumatic accumulator and at least one of the operating hole of the control unit with power lines functional actuator control valve bodies and the ends tied with them logical control line, equipped with not less than three times duplicated trigger mechanism, including two of which operate from a pulse applied to close the well when the risk of fire or supercritical low or high pressure in the train, as well as developed close the well in a logical sequence clipping fluid side of the valve - nazarena valve - underground shutoff valve"working through the system slowing down the passing team at the closing, including tandems from the control of the hydropneumatic accumulator and orifice in a logical line management on sites of interaction with power lines functional the CSO control actuators nadkarni valves and underground valve-stopping mechanism.

The invention is illustrated by drawings, where

figure 1 shows the gas-condensate wells, connection diagram of the control station shut-off bodies, throttle valve and an underground valve to gazokondensatnoe the borehole;

figure 2 - pump-and-accumulator installation, hydraulic schematic diagram;

figure 3 - unit well control, hydraulic schematic diagram.

The method of controlling a gas condensate well carried out by the following operations.

Gas condensate well 1 perform controlled by the opening and closing of the shut-off bodies of her x-Mas tree 2 - side and nadkarni valves 3, 4. In addition, gas-condensate well 1 is equipped with a managed underground valve 5 and regulating the flow rate by the throttle valve 6. To operate all of these bodies of gas condensate well 1 is attached to a completed structurally in the form of a case 7 of the control station, which includes a pump and an accumulator 8 installation with pump group 9 and is made mostly of a modular and sectional power functional hydropneumatic accumulator 10 high pressure. Power functional hydropneumatic accumulator 10 reported on the working body with the line 11 to the high pressure connecting them with a block of 12 justices who placed well 1. Line 11 high pressure feeds the working body connected to it via the step-down pressure regulators 13, 14 power lines 15-18 functional management mentioned locking bodies 3, 4 and the throttle valve 6. Side, nazarena valves 3, 4, underground shutoff valve 5 and the throttle valve 6 is supplied with actuating mechanisms. The control station is equipped with line 19 logic control. It is connected to the aforementioned Executive mechanisms through enables/disables the power pressure control valves 20-22. At the same time provide automatic completion of commands for sequential closing side of the valve 3, nadkarni valve 4, underground valve-stopping mechanism 5. For this purpose, sections 23, 24 of the interaction line 19 logic control with functional power lines 16, 17 of the actuator control nadkarni valve 4 and an underground valve-stopping mechanism 5 to the valve controllers 20, 21 pressure mounts control their moderators passing the command to close. Each moderator has control hydropneumatic accumulator 25 and is adjusted to the preset deceleration of the expiration of the Manager of the hydropneumatic accumulator 25 working fluid orifice 26. Command to close is given primarily to the actuator side of the valve 3, and then,with the specified deceleration, to the actuator nadkarni valve 4, and then, with an additional set deceleration to the actuator underground valve-stopping mechanism 5. To actuate the specified command on the closing line 19 logic control with a possibility of it control signal hydraulically connected with the control and governing bodies - fusible link 27 and valve 28 to control high and low pressure. They connect on a working body to their Manager of the discharge pressure at the specified line logic control triggering mechanism made in the form of valves 29, 30. Line 19 logic control dublirovannoe provided with a similar trigger mechanism, made in the form of distribution valves 31, 32, respectively, remote and manual process starts coherent mentioned closing of the shut-off bodies wells 1.

The dynamics of the control station determines the characteristics of the control pneumopericardium 25 pressure control choke 26 installed on sections 23, 24 respectively of the interaction line 19 logic control with power lines 16, 17 functional control of actuators nadkarni valve 4 and an underground valve-stopping mechanism 5. Select the ha is acteristic thus, to ensure trouble-free closing of the well 1 is in sequence.

Supplied to the power line 17 and functional management of an underground valve-stopping mechanism 5 high pressure pre-reduced, passing through the regulator 14 of the pressure to the level required for submission to consistently set him multiplier 33 pressure, from which the working fluid enters the pressure necessary for appropriate management mentioned underground valve 5. Produce a duplicate of the individual elements of the pump-battery installation 8, in particular duplicate the work of the line "pump - pressure regulator - multiplier", in parallel across the input and output taps backup pair of pressure regulator - multiplier.

Spent working fluid at the closing of the well 1 is passed through the bypass drain line 34 of the hydraulic system.

Monitoring compliance with safe operating temperatures at the wellhead and automatic closure of the borehole when their violation initiate and carry through the use of hydraulic lines 35 to destroy the fusible link 27, the melting of which is mentioned through the control valve 29 automatically reduce the pressure in line 19 logic control and thus include auto is e closing side, nadkarni valves 3, 4 and underground valve-shut-off valve 5 gas condensate through the system slowing down, providing a coherent passage of a command signal to close to the actuators of the last two of them. At the same time a signal about the fire dispatcher at the Central remote control (on the drawings conventionally not shown)placed at a distance from the control station and reported her communication line, such as fiber optic cable or radio channel.

Controlling the operating mode of the pressure in the well 1 and closing the bore at the exit of the acceptable pressure range, carried out through the use of hydraulic lines 36 of the valve 28 to control the low and high pressure in the plume, which is beyond the allowable range of the pressure automatically starts the distribution valve 30 line 19 logic control, and through it provide automatic closure of wells in the mentioned sequence.

Remote electromagnetic signal for closing the wells can be served with Central control and management station can perform in the Cabinet 7 is preferably made of stainless steel, in which are mounted mentioned pump-battery installation 8, and flow control 12. Station supply piping in VI is e mentioned power lines 15-18 functional management reported on the working body with actuators valve bodies 3, 4, the throttle valve 6 and an underground valve-stopping mechanism 5.

In the closet 7 support temperature that ensures smooth functioning of all located in it elements and systems. It is performed insulated and explosion, and the connection cable lines to the rack 36 is performed through cable outlets in explosion-proof version.

As a working medium fluid selected temperature viscosity and temperature of freezing climatic conditions well. The control station is designed for operation in the third and fourth climatic zones, as a working body equip mostly mineral oil. For the first and second climatic zones as a working body take liquid with a low freezing point mainly type silicon, for example polymethylsiloxanes. The working fluid is mainly supplied from the tank 37 installed in the pump-battery installation 8, which is equipped with at least one level indicator filling liquid, such as a visual indicator or a level sensor provided in the channels of telemetry with the Central remote control. It is possible to apply the level sensor is equipped with a system of hearth and signals on the maximum allowable and critical levels, or you can connect to the system Central control unit, issuing a command for maintaining the liquid level in the tank within predetermined limits. For the first and second climatic zones of the tank 37 of the working fluid supplied by the fluid heater, made in the form of a coil or heating element.

Pumping group 9 equip at least one pump 38, predominantly pump high pressure, preferably an axial piston with asynchronous motor 39 is doubled for the first and second climatic zones, at least one additional parallel connected electric pump high pressure. The pump 38 or pumps include the line 11 through a high pressure input and output filters 40, 41 preferably coarse and fine cleaning, respectively. Each of these pumps 38 at the outlet equipped with a safety valve 42 and pressure mounted to selectively disconnect from the line 11 through a high pressure system locking devices. Installed at the output of the filters 41 fine cleaning provide a visual indicator and/or electrical sensor in communication with the Central control unit. Pumping group 9, provided on the output devices start or stop the motor 39 of the pump 38 and the check valve 43, reported through the last line 11 high pressure is made with modular sectional power functional hydropneumatic accumulator 10. It consists of parallel-connected to the collector 44 of the modules 45 and is designed to create the necessary working pressure in the above-mentioned power lines 15-18 functional management. The manifold 44 with power functional hydropneumatic accumulator 10 report on the working body with the line 11 high pressure. Device start or stop the motor 39 of the pump 38 connected to line 11 high pressure is performed, for example, in the form of a relay 46 pressure, either in the form of analog pressure sensors, either in the form of electrical contact pressure gauges. Modules 45 functional power of the hydropneumatic accumulator 10 is implemented with a membrane or piston preferably the separator environments. The total working volume of all modules 45 functional power of the hydropneumatic accumulator 10 shall not be less than required for a single opening of the valve bodies 3, 4 wells 1, the throttle valve 6 and an underground valve-stopping mechanism 5 when disconnected the power supply or to maintain the operating condition of the well 1 for a period of not less than one month in the absence of electricity.

By regulators 13 pressure reduce the pressure from the functional 10-100 MPa to working from 0.5 to 70 MPa in the power lines 15, 16, 18 functional control of actuators nadkarni, side valves 4, 3, drosselklappen 6 and in line 19 logic control. Line 19 logic control also includes line 36, 35 of the valve 28 to control high and low pressure and a fuse 27. The controller 14 of the pressure in the power line 17 functional control actuator underground valve-shut-off valve 5 adjusts the flow of the working fluid in the subsequently installed behind the multiplier 33 with the gear of the latter and the desired output pressure of the working fluid is not less 21-70 MPa for subsequent delivery and management of the Executive mechanism of the underground valve-stopping mechanism 5. All of these power lines 15-18 functional management supply installed in areas in front of actuators safety valves 47 pressure.

Block 12 control equipped with an automatic protection wells 1, remote and manual shutdown of the well. Automatic protection system includes connected to the line 19 logic control through the mentioned distribution valves 29, 32 line 35 fuse 27 and line 36 of the valve 28 to control high and low pressure. The valve 28 to control high and low pressure are placed in the area adjacent to the wellhead 2, preferably on the train. Line 36, 35 of the valve 28 to control high and low pressure and a fuse 27 is supplied with the relay 48 or dates what IKI pressure with signal about disabling wells, respectively, by fire, or by reason of outside the range of operating pressures, established by the setting of valve 28 to control high and low pressure on the Central remote control.

Line 19 logic control consistently connect on the working body through a distribution valve 49-51 to maintain a logical sequence of well control 1 and control valves 20-22 with power lines 15-17 functional control of actuators, including, at least, underground valve-stopping mechanism 5, nadkarni and side valves 4, 3 are valid close to some, namely in the opposite sequence with adjustable set valid time intervals between outages of each of them. This on line 19 logical control set mentioned control pneumohydroaccumulators 25 with the possibility of their interaction on the pressure relief each with its orifice 26. Managing the hydropneumatic accumulator 25 on the section 24 of interaction with the power line 17 functional control actuator underground valve-stopping mechanism 5 configure to slow down the closure of the underground valve-stopping mechanism 5 at the time, 1.5-2 times the interval between closing nadkarni valve 4 and the side gate valve 3, comprising from 10 to 120 C.

On line 19 logical what about the control plot it to the power supply line 15 function control actuating mechanism side gate valve 3 installing the solenoid valve 52 remote off the side of the valve 3.

Power line 18 function control actuating mechanism of the throttle valve 6 provide three-position valve 53 preferably with two electromagnets.

Distribution valves of all power lines 15-18 functional control of actuators associated with the bypass drain line 34 to reset the spent working fluid. The bypass drain line 34 reported mainly through the filter to the tank 37 of the working fluid.

On power lines 15-18 functional actuator control valve bodies 3, 4, a throttle valve 6, an underground valve-stopping mechanism 5 set temperature relief valves 54, skommutirovany output with bypass drain line 34 to reset the excess working fluid released when the temperature of the working fluid and/or the environment.

Pump-and-accumulator installation 8 operates mainly with the remote front panel.

The locking bodies 3, 4, the throttle valve 6 and an underground shutoff valve 5 provided with control devices located on the front panel of the control unit.

Control of actuators line 19 logic control can be implemented in remote mode commands the remote operator, such as Manager C is antralnogo remote control.

Monitoring the level of pressure in the arteries station carried out automatically, including using electric contact pressure gauges.

The program operation unit 12 of the control station set up in such a way that in the absence of the supply voltage for the elements station shut-off elements wellhead valves remain open, and the unit provides a signal about the absence of voltage on the Central control console.

The possibility of closing the well 1 is in sequence "side gate valve 3 - nazarena valve 4 - underground shutoff valve 5" provide in an automatic mode according to the commands of the remote control station, remote control mode by the operator from a remote Central control and manual mode, and the opening sequence of "underground shutoff valve 5 - nazarena valve 4 - side gate valve 3" preferably provide in the manual control mode.

The well control is as follows.

At the beginning of the work station control all the hydraulic system is filled with the working fluid working environment.

The required working pressure of the working medium in the line control station set up and maintained by pump-and-accumulator installation 7.

Working environment from the tank 37 with a volume of about 200 l for pipe the wire is fed through the filter 40 and the valve on the inlet of the pump 38, which actuate the motor 39. At the outlet of the pump 38 after crane working medium is passed through the filter 41 fine cleaning.

The relief valve 42 is set to the preset working pressure 21 MPa and in excess of a predetermined value of pressure connecting line 11 high pressure cavity of the tank 37. Reset the excessive volume of the working medium in the bypass drain line 34.

Through the check valve 43 from line 11 of the high-pressure working medium is fed to the collector 44 and fill the modules 45 functional power of the hydropneumatic accumulator 10 for storing an adequate supply of working medium under pressure, with each module 45 is made with a volume of 40-50 HP

After filling of the power of functional hydropneumatic accumulator 10 working environment through pipelines served in the power lines 15-18 functional actuator control valve bodies, underground valve-shut-off valve, throttle valve and in line 18 logic control.

Use the slider 14 of the pressure in the power line 17 functional control actuator underground valve-stopping mechanism 5 reduces the pressure in line 11 high pressure 21 MPa pressure, three -, or four times the pressure at the output of the multiplier 33, provides a working pressure to force the mouse to turn 17 functional control actuator underground valve-stopping mechanism 5, equal to 24 MPa (280 kgf/cm2). The relief valve 47 is set to the preset working pressure 28 MPa and in excess of a predetermined value of pressure connect the line 17 with the cavity of the tank 37, reset the excessive volume of the working medium in the bypass drain line 34.

The knobs 13 pressure pressure reducing power lines 18 function control actuating mechanism of the throttle valve 6 and line 19 logic control to a working pressure of 4 MPa (40 kgf/cm2), and in the power lines 15, 16 functional management respectively actuators side and nadkarni valves 3, 4 to 14 MPa (140 kgf/cm2). Safety valves 47 configure the specified working pressure of 4 MPa and in excess of a predetermined pressure to connect said line with the cavity of the tank 37, reset the excessive volume of the working medium in the bypass drain line 34.

In block 12 control station working environment at a pressure of 4 MPa in line 19 logic control serves to the input of a normally closed hydraulic distribution valve 29 is designed for pressure relief of the control in case of fire. After filling line 35 fuse block 27 of the hydraulic control valve 29 open, and fluid is fed to the input of the normally closed GI is replicastore valves 30, designed for pressure relief of the control when the valve 28 to control high and low pressure, is installed in the line 36 mentioned valve. Then, the working medium passes through the normally open control valve 31, which is designed for remote switching all wells, and the control valve 32 that is designed for manual emergency shutdown of the entire borehole through emergency shutdown.

After the distribution valve 32, the working medium fed to the input of the normally closed valves 49 hydraulic and manual override.

With a full line 35 fuse 27 relay 48 pressure outputs a signal to the Central control console.

With a full line 36 of the valve 28 to control high and low pressure another relay 48 pressure provides a signal to the Central control console.

Next to open the well, perform the following steps:

- pull the handle distribution valve 49, which is placed on samaritana and working environment through the check valve 56 is supplied to the actuator of a control valve 20, which is opened, and the working environment of the power line 17 functional control actuator underground valve-shut-off valve 5 is supplied to its Executive is echanism. Is the opening of an underground valve-stopping mechanism 5;

- pull the handle of the distribution valve 50, which is placed on samaritana and working environment through the check valve 57 is supplied to the actuator of a control valve 21, which is opened, and the working environment of the power lines 15, 16 functional management respectively actuators side and nadkarni valves 3, 4 is supplied to the actuator nadkarni valve 4. Is the opening nadkarni valve 4;

- pull the handle distribution valve 51, which is placed on samaritana and working environment through normally open solenoid valve 52 is supplied to the actuator of a control valve 22 which is opened, and the working environment of the power lines 15, 16 functional management respectively actuators side and nadkarni valves 3, 4 is supplied to the actuator side of the valve 3. Is the opening side of the valve 3. Gas condensate from the well 1 is fed through the open underground shutoff valve 5 in the tree 2.

The closing of the well 1 may be carried out by the automatic protection system or the system remote shutdown of the well. In addition, there is the possibility of independent control throttle valve.

The auto is eticheskoi protection

At typical values of the pressures in the lines 36, 35 respectively of the valve 28 to control high and low pressure and a fuse 27 wells the control valve 30 is in the open position. When the drop or increase in pressure of the working medium in the above-mentioned lines above or below the established (given) values of the control valve 30 moves to the closed position, reset the working environment of the power lines 20-17 functional management respectively actuators side, nadkarni valves 3, 4 and underground valve-stopping mechanism 5. The chokes 26 and control pneumopericardium 25 serve to regulate the time interval in the sequential closing of the shut-off bodies wells 1.

In the event of a fire when the temperature of the environment at the wellhead above the set value (when the fire situation) resets the working medium from line 35 fuse 27, after which the control valve 29 moves to the closed position, reset the working environment of the power lines 15-17 functional management respectively side, nadkarni valves 3, 4 and underground valve-stopping mechanism 5. The chokes 26 and control pneumopericardium 25 serve to regulate the time interval when the serial Zack is the eve ENT of the locking bodies wells 1.

System remote shutdown wells

In block 11 of the control station is equipped with the control valve 31, executed solenoid, and the solenoid valve 52 remote shutdown, managed from the control panel station, or from the Central control console.

When signal 24 to the electric distribution valve 31 is remote closing side of the valve 3, nadkarni valve 4 and an underground valve-stopping mechanism 5.

When the signal is 24V, the motor valve 52 remote control is remote closing side of the valve 3.

Control throttle valve

When voltage is applied to the first three-position solenoid valves 53, the working medium under pressure up to 4 MPa from the power line 18 function control actuating mechanism of the throttle valve 6 is served in its Executive mechanism. From the positioner mounted on said valve, receives the analog signal in wardrobe 7 control or Central control. Then from the Cabinet 7 signal to the first electromagnet (tension) and the three-position control valve 53 is transferred to the neutral position. If necessary, reduce the consumption of gas condensate from the Cabinet is 7 control signal to the second three-position solenoid valves 53, reset the working environment to the specified parameters.

Thus, the proposed method of extraction of gas condensate provides improved reliability and trouble-free operation of gas-condensate field.

1. Method of well control gas condensate field, characterized by the fact that perform well managed by the opening and closing of the shut-off bodies wellhead equipment - side and nadkarni valves and underground valve-stopping mechanism, as well as regulating the flow rate of the throttle valve, for which the well is connected to the completed structurally in the form of a case control station including a pump and an accumulator installation with pump group and is made mostly of a modular and sectional power functional hydropneumatic accumulator high pressure, reported on the working body with the line of the high pressure connecting them to the control unit; when this line is high pressure feeds the working body connected to it through lowering the pressure regulators the power line and functional management mentioned locking bodies and the throttle valve is supplied with each actuator and to control the last station, in addition, equipped with line logic control, which connect via an include-odlucujucu force referred to the actuators of the valves to provide automatic completion of commands in the sequential closing side of the valve, nadkarni valves, underground valve-stopping mechanism, which on the areas of interaction line of logic control with power functional control lines actuators nadkarni valves and underground valve-stopping mechanism to the mentioned valves-pressure regulators connected control their moderators passing commands to the closing, each of which has a control hydropneumatic accumulator and adjusted to the preset deceleration of the expiration of the Manager of the hydropneumatic accumulator of the working fluid orifice, the team at the closing comes, primarily, to the actuator side of the valve, then, with the specified deceleration - to the actuator nadkarni valve, after which, with specified additional slow - to the actuator underground valve-stopping mechanism and for actuating the specified command on the closing line logic control, with a possibility of it control signal, hydraulically connected with the control and governing bodies - the fusible link and the control valve high and low pressure, which is connected on the working body, each to his Manager of the discharge pressure at the specified line logic control triggering mechanism, in addition, line logic control control is Pirovano provided with a similar trigger mechanism remote and manual process starts coherent mentioned closing of the shut-off bodies well.

2. The method according to claim 1, characterized in that the dynamics of the control station determines the characteristics of the control pneumopericardium pressure and adjustable chokes are installed on the sites of interaction line of logic control with power lines functional control of actuators nadkarni valves and underground valve-stopping mechanism, and are selected so as to ensure trouble-free closure of the wells in the specified sequence.

3. The method according to claim 1, characterized in that the input to the power line and functional management of an underground valve-shut-off valve high pressure pre-reduced, passing through the pressure regulator to the level required for submission to sequentially mounted behind the intensifier, from which the working fluid enters the pressure necessary for appropriate management referred to the underground valve.

4. The method according to claim 3, characterized in that to produce the duplication of certain elements of the pump-and-accumulator installation, in particular duplicate the work of line pump group-pressure regulator-multiplier" in parallel across the input and output taps backup pair: pressure regulator-multiplier.

5. The method according to claim 1, characterized in that reflect atashee working body when closing the wells pass through the bypass drain line of the hydraulic system.

6. The method according to claim 1, characterized in that the monitoring of compliance with safe operating temperatures at the wellhead and automatic closure of the borehole when their violation initiate and carry through the use of hydraulic lines to destroy the fusible link, the melting of which through the mentioned trigger automatically reduce the pressure in line logic control and thus include automatic closing side, nadkarni valves and underground valve-stopping mechanism through the system slowing down, providing a coherent passage of a command signal to close to the actuators of the last two of them, simultaneously receives a signal about the fire dispatcher at the Central control panel located at a distance of from the control station and reported her line, for example, fiber optic cable or radio channel.

7. The method according to claim 1, characterized in that the control over the operating mode of the pressure on the well and closing the bore at the exit of the acceptable pressure range, carried out through the use of hydraulic lines to the control valve low and high pressure in the plume, which is beyond the allowable range of the pressure automatically submits a command triggering mechanism line logic control, and through it assests the Ute automatic closure of wells in the mentioned sequence.

8. The method according to claim 1, characterized in that the remote electromagnetic signal for closing wells served from a Central control panel located at a distance from the control station and reported her line, for example, fiber optic cable or radio channel, and the Cabinet in which are mounted mentioned pump-and-accumulator installation and control unit, perform, preferably stainless steel, in addition, the station supply piping as mentioned power lines and functional management, reported on the working body with the Executive mechanisms of the locking bodies, throttle valve and an underground valve-stopping mechanism.

9. The method according to claim 8, characterized in that Cabinet support the temperature that ensures smooth functioning of all located in it elements and systems.

10. The method of claim 8, wherein the rack management station, perform insulated and explosion, and the connection cable lines to the closet performed through cable outlets in explosion-proof version.

11. The method according to claim 1, characterized in that the working medium is a liquid selected temperature viscosity and freezing point, based on the climatic conditions of the well, the control station is designed for operation in Ratia and four climatic zones, as a working body equip mainly mineral oil, and for the first and second climatic zones as a working body take liquid with a low freezing point, mainly type silicon, for example polymethylsiloxanes, while the working fluid is supplied from the tank, installed in pump-and-accumulator installation, which is equipped with at least one level indicator filling liquid, such as a visual indicator or a level sensor provided in the channels of telemetry to a Central control panel located at a distance from the control station and reported her line, for example, fiber optic cable or radio channel, used in this sensor level, equipped with a signal system on the maximum allowable and critical levels, or connected to the Central control unit issuing a command for maintaining the liquid level in the tank within predetermined limits, and for the first and second climatic zones of the tank of the working fluid supplied by the fluid heater, made in the form of a coil or heating element.

12. The method according to claim 1, characterized in that the pumping equip group, at least one pump, mainly electric pump high pressure, preferably an axial piston with an asynchronous motor, produblirovany the first and second climatic zones, at least one additional parallel connected electric pump high pressure, and the specified pump or pumps include in-line high pressure through the input and output filters preferably coarse and fine cleaning, respectively, and each of these pumps outlet equipped with safety valve and pressure mounted to selectively disconnect the high pressure line through a system of locking devices, and at least installed on the output filters provide a visual indicator and/or electrical sensor in communication with the Central control unit, placed at a distance from the control station and reported her line for example, fiber optic cable or radio channel, while pumping group, provided at the output devices start or stop motors, pumps and non-return valve, reported through the last line of high pressure modular sectional power functional hydropneumatic accumulator, consisting of parallel connected to the collector modules and designed to create the necessary working pressure in said power lines, functional management, and the collector of the power functional hydropneumatic accumulator report on RA is W HY the body with a line of high pressure, in addition, these devices start or stop a motor pump connected to the high pressure line, is performed, for example, in the form of a pressure switch, or in the form of analog pressure sensors, either in the form of electric contact pressure gauges, and the modules mentioned functional power of the hydropneumatic accumulator perform with diaphragm or piston preferably the separator environments, while the total working volume of all modules of the functional power of the hydropneumatic accumulator shall not be less than required for a single opening of the shut-off bodies bore, a throttle valve and an underground valve-stopping mechanism when disconnected the power supply or to maintain the operating condition of the well for a period of not less than one month when the lack of electricity.

13. The method according to claim 1, characterized in that the said pressure regulators reduce the pressure from the functional 10-100 MPa to working from 0.5 to 70 MPa in the power lines of functional control of actuators nadkarni, side valve, throttle valve and in-line logic control, including the line of control valve high and low pressure and a fuse, and a pressure regulator in the power line and functional management of the Executive mechanism of the underground valve-adequate what I set up on the flow of the working fluid in the subsequently installed behind him multiplier taking into account the gear ratio of the last and the desired output pressure of the working fluid is not less 21-70 MPa for subsequent submission and control actuator underground valve-stopping mechanism, all power line and functional management supply installed in areas in front of actuators safety valves pressure.

14. The method according to claim 1, characterized in that the control unit is equipped with an automatic protection wells, remote and manual off well, with automatic protection system includes connected to line logic control through the mentioned triggers line fuse and line control valve high and low pressure, the valve control low and high pressure are placed in the area adjacent to the wellhead, preferably on the train, and the line of control valve high and low pressure and a fuse provided with a relay or pressure sensors with signal about disabling wells, respectively, by fire, or by reason of output outside the range of allowable operating pressure established by the setting of control valve high and low pressure on the Central control panel located at a distance from the control station and reported her line, for example, fiber optic cable or radio channel.

15. The method according to claim 1, characterized who eat that line of logic control consistently connect on the working body through the distribution valve to maintain a logical sequence of well control and safety valves with power lines functional control of actuators, including, at least, underground valve-stopping mechanism, nadkarni and side valves with the possibility of their allowable closing in particular, namely in the opposite sequence, with adjustable set valid time intervals between outages of each of them, for which on-line logic control install these control pneumohydroaccumulators with the possibility of their interaction on the pressure relief each with its throttle, while managing the hydropneumatic accumulator on the site of interaction with the power line and functional management of the Executive mechanism of the underground valve-stopping mechanism set up by the slow closing of the underground valve-stopping mechanism at the time, 1.5-2 times the interval between closing nadkarni valve and the side of the valve, comprising from 10 to 120 C.

16. The method according to claim 1, characterized in that on-line logic control at the site of its supply to the power line and functional management Executive IU what unisom side valves are solenoid valve remote switching on and off of the side of the valve.

17. The method according to claim 1, characterized in that the power line functional control actuator throttle valve supply three-position valve preferably with two electromagnets.

18. The method according to claim 1, characterized in that the distribution valves of all power lines functional control of actuators associated with the bypass drain line to discharge the spent working fluid, while the bypass drain line reported mainly through the filter to the tank of a working body established in pump-and-accumulator installation.

19. The method according to p, characterized in that on the power lines functional actuator control valve bodies, throttle valve, underground valve-stopping mechanism set temperature relief valves, skommutirovany output with bypass drain line to clear excess working fluid released when the temperature of the working fluid and/or the environment.

20. The method according to claim 1, characterized in that the pump-and-accumulator installation operates mainly with the remote front panel.

21. The method according to claim 1, characterized in that the shut-off bodies, throttle valve and an underground shutoff valve supply control devices, wyneken the mi on the front panel of the control unit.

22. The method according to claim 1, wherein the starter control mechanisms the lines of the logical control in remote mode commands the remote operator, such as Manager of the Central control panel located at a distance from the control station and reported her line, for example, fiber optic cable or radio channel.

23. The method according to claim 1, characterized in that the control pressure in the arteries of the control station carried out automatically, including using electric contact pressure gauges.

24. The method according to claim 1, characterized in that the work program of the control unit in the station set up so that when no voltage for the elements of the station shut-off elements wellhead valves remain open, and the control unit transmits the signal about the absence of voltage on the Central control console.

25. The method according to claim 1, characterized in that the possibility of closing the hole in the sequence "side valve - nazarena valve - underground shutoff valve" provide in an automatic mode according to the commands of the remote control station, remote control mode by the operator with remote control and manual mode, and the opening sequence of "underground shutoff valve - n is Corinna valve - side valve" provide preferably in manual control mode.



 

Same patents:

Oil well pad // 2367772

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of an oil well pad. The oil well pad comprises at least two oil wells, each of which contains an extracting column with a flow column with underground production equipment, containing at least circulating and shear valves, non-freezing return valve and, if necessary, a separation column, meant for separating oil and water, as well as a remote controlled device for cutting off flow of oil, made with an actuating mechanism, wellhead with wellhead equipment, with a column head, tubing head, on which an X-mas tree is mounted, which comprises shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter for controlling flow, made with an actuating mechanism, and monitoring and control elements - fuse link and a low- and high-pressure valve. Each well is linked through its shutting-off devices to a control station, which comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator linked through the actuating medium of the high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve and the cut off device, supplied by the said high-pressure line through pressure regulators, and controls their operation through a time-stepped system for command transmission for at least closure of a well in the logical sequence: "wing valve - casing valve - cut off device" - logical control line, linked to the fuse link and low- and high-pressure control valve and fitted with hydraulic control valves which can back up command transmission for closure of each well. One of the hydraulic control valves transmits a command for closing each well to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control, respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and the cut off device, where the delay mechanisms comprise a hydropneumatic accumulator and a throttle, which provide for closure of each well at different times. The power line for functional control of the actuating mechanism of the throttle valve is provided with a three-position distribution valve, preferably with two electromagnets.

EFFECT: more reliable and accident-free operation of oil wells, which are part of an oil well pad, reduced cost of extracting oil and much easier control of processes.

16 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to reservoir engineering and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of gas field wells. The equipment contains a control station for shutting-off devices of the well, more specifically wing and casing valves, fitted on wellhead equipment, choke valve, underground safety valve, with actuating mechanisms, as well as a valve for controlling low and high pressure and a fuse link. The control station includes at least one control unit for actuating mechanisms for shutting off devices, a pump-accumulator unit with and actuating medium, mainly in form of liquid, power lines for functional control of the said actuating mechanisms and a logical control line, which can provide for command transmission for at least shutting off the well in a logical sequence: wing valve - casing valve - underground safety valve, fitted for this system for double selective actuation, respectively, of the low pressure and high pressure control valves, fuse link, either remote or manual command for closing shutting off devices of the well. For this purpose the said line is also provided with a timed three-step actuating system with slow transmission of actuation command for at least closure of casing valve and underground safety valve, including logical control lines in at least sections for controlling the casing valve and the underground safety valve, different time-tuned command transmission delay mechanisms, consisting of a combination a hydropneumatic accumulator and a choke, fitted in series in the said sections. The pump-accumulator unit has a tank with actuating medium and a group of pumps.

EFFECT: more reliable and accident-free operation of the well, reduced cost of extracting oil and gas and much easier control of processes.

15 cl, 3 dwg, 1 ex

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of gas fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of gas field wells. The equipment contains a control station for shutting-off devices of the well, more specifically wing and casing valves, fitted on wellhead equipment, throttle valve, underground safety valve, with actuating mechanisms, as well as a low- and high-pressure control valve and a fuse link. The control station includes at least one control unit for actuating mechanisms for shutting-off devices, a pump-accumulator unit with and actuating medium, power lines for functional control of the said actuating mechanisms and a logical control line, which can provide for command transmission for at least shutting off the well in the logical sequence: wing valve - casing valve - underground safety valve, fitted for this system for double selective actuation of, respectively, low- and high-pressure control valve, fuse link, either remote or manual command for closure of shutting-off devices of the well. For this purpose the said line is also provided with a timed three-step actuating system with delayed transmission of actuating command for at least closure of the casing valve and underground safety valve, including logical control lines and different time-tuned command transmission delay mechanisms, on at least sections for controlling the casing valve and safety valve. These lines consist of a combination of a hydropneumatic accumulator and a throttle fitted in series in the said sections. The power line for functional control of the actuating mechanism of the safety valve has at least one pressure booster.

EFFECT: more reliable and no-failure operation of the well, reduced cost of extracting gas, much easier control of processes.

15 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil-gas fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of an oil and gas well pad. The well pad comprises at least two oil and gas wells, each of which contains an extracting column and a flow column with underground production equipment, containing at least a production packer, circulation and shear valves, as well as a remote controlled safety valve with an actuating mechanism, wellhead with wellhead equipment, with a column head, tubing head, on which an X-mas tree is mounted, which includes shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter, made with an actuating mechanism, and monitoring and control elements - fuse link and a low- and high-pressure control valve. Each well is linked through its shutting-off devices, throttle valve and safety valve to a control station, which comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps, fitted for the first and second climate zones, preferably, with two parallel connected high-pressure pump, one of which is a distribution pump, and a high-pressure power functional hydropneumatic accumulator linked to the group of pumps through the actuating medium of the high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve and safety valve, supplied by the said high-pressure line through pressure regulators, and made with possibility of controlling their operation through a time-stepped delayed command transmission for at least closure of each well in the logical sequence: "wing valve - casing valve - safety valve" - logical control line, linked to the fuse link and low- and high-pressure control valve and fitted with hydraulic control valves which can back up command transmission for closure of each well, one of the hydraulic control valves of which can transmit a command for closure of each well to the logical control line from the fuse link, the other from the low- and high-pressure control valve, and at least two others - from remote and manual control, respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line and power lines for functional control of actuating mechanisms of the casing valve and safety valve, where the delay mechanisms comprise a hydropneumatic accumulator and a throttle, which provide for closure of the well at different times. The power functional hydropneumatic accumulator is essentially modular-sectional.

EFFECT: more reliable and accident-free operation the well, which is part of the oil and gas well pad, reduced cost of extracting oil and gas and much easier control of processes.

17 cl, 3 dwg

Control valve // 2366846

FIELD: gas and oil industry.

SUBSTANCE: invention relates to control valves and accessories to be used in gas and oil production. Proposed control valve comprises a body with central bore accommodating shut-off member, inlet and outlet branch pipes, and combined drive mechanism. The latter consists of two one-way mechanisms and one counter-propagating mechanism. Aforesaid shut-off member comprises one cartridge with two through holes and throttle blade representing a hollow cylinder with inner annular ledge. The latter features bearing faces equally spaced from outer faces of the throttle blade linked up with the rod. The rod stem accommodates aforesaid drive mechanisms. Mechanical or manual drive mechanism seats, partially, on the stem extension and is partially aligned with automatic mechanism of the rod backstroke. Combined drive housing has a profiled cover with a cup directed inside the said housing. Aforesaid stem is furnished with a device designed to convert rotary motion of aforesaid mechanical or manual drive into reciprocation of aforesaid rod.

EFFECT: reduced metal input, longer life and higher efficiency.

19 cl, 8 dwg

FIELD: oil and gas production.

SUBSTANCE: group of inventions refers to system and method of optimisation of production from oil or gas well by means of electric immersed pumps. The essence of the invention is as follows: according to inventions the following parametres of production on surface and in the borehole of well are controlled: pressure and temperature in a flow string, viscosity of fluid medium, rate of flow, pressure in a suction port and in a pressure port of the pump and temperature in the suction port of the pump. A system of detectors is used for control over parametres in the borehole of the well. Also the detectors are spaced in the well and they receive streaming of data on-line. According to the model of optimisation there are evaluated measured data obtained from plurality of parametres of production and plurality of well parametres. Operation of mechanism for artificial lifting is regulated on base of automatic evaluation of data and of their trends.

EFFECT: increased efficiency of production due to ability of timely elimination of potential problems adverse to production.

26 cl, 16 dwg

Oil and gas well // 2365738

FIELD: oil and gas production.

SUBSTANCE: invention is related to oil and gas industry, and in particular, to development of oil and gas deposits, and may be used for remote, automatic and manual control of actuating mechanisms of oil and gas well stop elements. Well comprises flow string with tubing string with underground operating equipment, which comprises operating packer, circulating and shear valves, and also remote-controlled isolating valve arranged with actuating mechanism, wellhead with equipment having flow string head, tube head, on which well-control equipment is installed, being arranged in the form of herringbone, including stop elements - above-root and side gate valves with actuating mechanisms, and also throttle valve adjacent to the latter for control of well debit, which is arranged with actuating mechanism, and control-monitoring elements - fusible insert and valve of low and high pressure control. Besides, well is connected to station of stop elements, throttle valve and isolating valve control, which includes pump-accumulator installation and control unit. Pump-accumulator installation includes pump group equipped for the first and second climatic zones by two parallel-connected high pressure pumps, one of which is arranged as duplicating one, and power functional pneumatic hydraulic accumulator of high pressure that communicates to pump group by working medium with high pressure line. Control unit includes power lines of functional control of stop element actuating mechanisms, throttle valve, isolating valve energised from mentioned high pressure line via pressure controllers for reduction of functional pressure to required value, and these power lines are used to control operation of listed components through system of command transmission stepped in time, at least for well closure, in logical sequence - "side valve - above root gate valve - isolating valve" - logical control line. It communicates with fusible insert and valve of low and high pressure control and is equipped with hydraulic distribution valves with the possibility of well-closure commands transmission duplication, one of which - for transmission of well closure command into logical control line from fusible insert, the other - from valve of low and high pressure control. Actuation of two other valves is intended from remote and manual control. Slowdown system comprises delay mechanisms installed on sections of logical control line interaction with power lines of functional control of actuating mechanisms of above-root gate valve and isolating valve, and the delay mechanisms include control pneumatic hydraulic accumulator and throttle, which provide for time-different response for well closure. Power functional pneumatic hydraulic accumulator is arranged as modular-sectional.

EFFECT: provides for improved reliability and faultless operation of oil and gas well, lower prime cost of oil and gas production and simplified control of well.

17 cl, 3 dwg

FIELD: oil and gas production.

SUBSTANCE: invention is related to oil and gas industry, and in particular to the field of oil deposit development, and may be used for remote, automatic and manual control of actuating mechanisms of oil deposit well stop elements. Complex of equipment for well control comprises station of well stop elements control - side and above-root gate valves, which are installed on well-control equipment, throttle valve for control of well debit, underground device that isolates oil flow in well, having actuating mechanisms, and also valve for control of low and high pressure and fusible insert. Besides, control station includes unit for control of actuating mechanisms of stop elements, pump-accumulator installation with working medium, power lines of functional control of mentioned actuating mechanisms and line of logical control. This line is made with the possibility of commands transmission for well closure in logical sequence "side gate valve - above-root gate valve - isolating device". For this purpose line is equipped with system of duplicate selective actuation from response of accordingly valve of low and high pressure control, fusible insert or remote or manual commands for closure of well stop elements. Mentioned line is also equipped with system of three-staged actuation in time with slowdown of executive command transmission to closure of above-root gate valve and underground isolating valve, which comprises mechanisms of command transmission delay tuned differently in time and installed on lines of logical control in sections of above-root gate valve and isolating device. These delay mechanisms consist of combination of control pneumatic hydraulic accumulator and throttle serially installed on specified sections. Power line of functional control of throttle valve actuating mechanism is equipped with three-way distribution valve with two electromagnets.

EFFECT: provides for improved reliability and faultless operation of oil pool well, lower prime cost of oil production and simplified control of well actuating mechanisms.

15 cl, 3 dwg

FIELD: oil and gas production.

SUBSTANCE: invention refers to production of oil, gas and gas (hydrocarbon) condensate, particularly to process of lifting liquid from gas condensate deposits with low gas factor under conditions of abnormally low reservoir pressure. According to the procedure of lifting liquid from bottomhole of gas condensate wells with low gas factor under conditions of abnormally low reservoir pressure by means of liquid and solid foaming agents the well is treated by separate simultaneous effect onto two zones of treatment with two types of surface active substances: liquid surface active substances are supplied into annular space and solid active substances are supplied into tubing string of the well.

EFFECT: facilitating efficient lifting of reservoir hydrocarbon containing liquid from gas condensate wells with low gas factor under conditions of low and abnormally low pressure in pay reservoirs.

1 tbl

FIELD: oil and gas production.

SUBSTANCE: group of inventions refers to gas producing industry and can be implemented for automatic control over processes at gas producing well operation. The method includes control over Christmas tress of a well cluster and consists in opening and shutting off Christmas tress of a well cluster by means of independent supply of working agent into actuators of side and borehole gates, underground shut-off valves and valves regulating yield of each well. Also liquid is used as working agent. Operational pressure of liquid is preliminary created in pneumatic hydro-accumulators of pressure united with a tank of working agent, with pumps, pressure regulators and multipliers into a hydraulic system. To implement the method there is disclosed a station containing a control cabinet, wherein the hydraulic system for control over the Christmas tree and the underground shut-off valve of wells is assembled; the system contains instruments of control equipment and automation, actuators, and distributors with a drive and with cavities of inlet, outlet and drainage installed as in the line of control over borehole and side gates, so in the line of control over the underground shut-off valve.

EFFECT: increased reliability of operation by means of functioning of station regardless of source voltage; also simplification of requirements to operation.

19 cl, 2 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of a gas-condensate field through remote, automatic and manual control of actuating mechanisms of well shutting-off devices. The method involves drilling exploratory wells, field delineating and assessment of natural hydrocarbon resources. Single or pad forming production wells are drilled. Flow lines and gathering manifolds are laid down, as well as utility systems. A complex and preliminary gas-condensate preparation device is fitted. Production wells are fitted with an X-mas tree, which includes a wing valve and a casing valve. The wells are fitted with an underground safety valve and the flow line is fitted with a throttle valve and monitoring and control devices - fuse link and a low- and high-pressure control valve. The wells are operated while controlling gas-condensate extraction processes. Part of the production wells of the pad and field is connected to a station or unit of stations for controlling the X-mas tree and underground safety valve. Each of the said stations is fitted with a pump-accumulator unit and a control unit for well shutting-off devices, connected to it through an actuating medium. The pump accumulator unit is fitted with a group of pumps, supplied by a tank with actuating medium, and a modular-sectional power functional hydropneumatic accumulator, connected to a high-pressure line. The control unit is fitted with power lines for functional control of shutting-off devices, supplied by the said line through pressure regulators, and a logical control line for the said well shutting-off devices, connected to the shutting-off devices through trigger mechanisms, which control pressure. Well control is carried out with automatic provision for a logical shut-off sequence: wing valve - casing valve - underground safety valve, executed through delay systems.

EFFECT: more reliable and accident-free operation of a gas-condensate field, reduced cost of extracting gas-condensate, simpler process of controlling extraction processes due to automated control of shutting-off devices of output wells.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of a gas field through remote, automatic and manual control of actuating mechanisms of well shutting-off devices. The method involves drilling exploratory wells, field delineation and assessment of natural hydrocarbon resources. Single or well pad forming production wells are drilled. Flow lines and gathering manifolds are laid down, as well as utility systems. A complex and preliminary gas preparation device is fitted. Production wells are fitted with an X-mas tree, which includes a wing valve and a casing valve. The well is fitted with an underground safety valve and the flow line is fitted with a throttle valve and monitoring and control devices - fuse link and a low- and high-pressure control valve. The wells are operated while controlling gas extraction processes. Part of the well pad and gas field is connected to a station or unit of stations for controlling the X-mas tree and underground safety valve. Each of the said stations is fitted with a pump-accumulator unit and a control unit for well shutting-off devices connected to it through an actuating medium. The pump-accumulator unit is fitted with a group of pumps supplied by a container with actuating medium and a power functional hydropneumatic accumulator, connected to a high-pressure line. The control unit is fitted with power lines for functional control of shutting-off devices, supplied by the said line through pressure regulators, and a logical control line for the said well shutting-off devices, connected to the shutting-off devices through trigger mechanisms, which control pressure. Well control is carried out with automatic provision for a logical shut-off sequence: wing valve - casing valve - underground safety valve, executed through delay systems.

EFFECT: more reliable and accident-free operation of a gas field, reduced cost of extracting gas, simpler process of controlling oil extraction processes due to automated control of shutting-off devices of output wells.

25 cl, 3 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used at development of gas-condensate field with usage of remote, automatic and unmanaged mode of sluices of well. According to method at deposit there are drilled and equipped producing welt clusters. In it there are installed production strings, introduced in them columns of tubing pipes, outfitted by subterranean production equipment, including pilot-controlled subterranean valve-clipper of gas, and control head, including production tree with sluices, including, not less than one side and one over-basic slide valves. It is mounted on trail throttle valve and it is installed supervisory control devices of system of emergency shutdown of well. These systems includes at least control valve of low and high pressure and filament. It is connected at least part of welt clusters of deposit to station and block of control stations for sluice of production tree and subterranean valve-clipper, which contains pump-and-accumulator station with force hydropneumatic accumulator and not less than one, tendering well control block with field lines and functional management of actuating mechanism for sluices. To it is bind logical control line, outfitted not less than three times duplicated starting mechanisms, including two from which operate from pulse, fed for closure of well at appearance of fire danger, or supercritical little or high pressure in trail. It is developed system of shutting-in of well in logical succession of fluid cutoff: "side valve - over-basic valve- subterranean valve-clipper", operating through the system of slowdown of command passing for closing. This system includes tandem consisting of controlling hydropneumatic accumulator and throttle in logical control line at sections of interaction with field lines of functional management for actuating mechanisms of over-basic valve and subterranean valve-clipper.

EFFECT: reliability growth and trouble-free operation of deposit, cost saving of products extraction, simplification of management of processes ensured by automated management of well's sluices.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of a gas-condensate field through remote, automatic and manual control of actuating mechanisms of well shutting-off devices. The method involves drilling exploratory wells, field delineating and assessment of natural hydrocarbon resources. Single or pad forming production wells are drilled. Flow lines and gathering manifolds are laid down, as well as utility systems. Complex and preliminary gas-condensate preparation equipment is fitted. Production wells are fitted with an X-mas tree, which includes a wing valve and a casing valve. The wells are fitted with an underground safety valve and the flow line is fitted with a throttle valve and monitoring and control devices - fuse link and a low- and high-pressure control valve. The wells are operated while controlling gas-condensate extraction processes. Part of the production wells of the pad and field is connected to a station or unit of stations for controlling the X-mas tree and underground safety valve. Each of the said stations is fitted with a pump-accumulator unit and a control unit for well shutting-off devices, connected to it through an actuating medium. The pump accumulator unit is fitted with a group of pumps, supplied by a tank with actuating medium, and a modular-sectional power functional hydropneumatic accumulator, connected to a high-pressure line. The control unit is fitted with power lines for functional control of shutting-off devices, supplied by the said line through pressure regulators, and a logical control line for the said well shutting-off devices, connected to the shutting-off devices through trigger mechanisms, which control pressure. Well control is carried out with automatic provision for a logical shut-off sequence: wing valve - casing valve - underground safety valve, executed through delay systems.

EFFECT: more reliable and accident-free operation of a gas-condensate field, reduced cost of extracting gas-condensate, simpler process of controlling extraction processes due to automated control of shutting-off devices of output wells.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used in exploitation of an oil-gas field through remote, automatic and manual control of actuating mechanisms of well shutting-off devices. The method involves drilling exploratory wells, field delineating and assessment of natural hydrocarbon resources. Single or pad forming production wells are drilled. Flow lines and gathering manifolds are laid down, as well as utility systems. Complex and preliminary well fluid preparation equipment is fitted. Production wells are fitted with an X-mas tree, which includes a wing valve and a casing valve. The wells are fitted with an underground safety valve and the flow line is fitted with a throttle valve and monitoring and control devices - fuse link and a low- and high-pressure control valve. The wells are operated while controlling fluid extraction processes. Part of the production wells of the pad and field is connected to a station or unit of stations for controlling the X-mas tree and underground safety valve. Each of the said stations is fitted with a pump-accumulator unit and a control unit for well shutting-off devices, connected to it through an actuating medium. The pump accumulator unit is fitted with a group of pumps, supplied by a tank with actuating medium, and a power functional hydropneumatic accumulator, connected to a high-pressure line. The control unit is fitted with power lines for functional control of shutting-off devices, supplied by the said line through pressure regulators, and a logical control line for the said well shutting-off devices, connected to the shutting-off devices through trigger mechanisms, which control pressure. Well control is carried out with automatic provision for a logical shut-off sequence: wing valve - casing valve - underground safety valve, executed through delay systems.

EFFECT: more reliable and accident-free operation of a oil-gas field, reduced cost of extracting oil and gas, simpler process of controlling extraction processes due to automated control of shutting-off devices of output wells.

24 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used in exploiting oil fields through remote, automatic and manual control of actuating mechanisms of oil well shutting-off devices. According to the method, oil well pads are drilled on an oil field and equipped. In the production casings of these wells, tubing strings are made, fitted with underground production equipment and wellhead equipment. Production equipment comprises an underground device for cutting off flow of oil in the well. Wellhead equipment comprises an X-mas tree with shutting-off devices - wing and casing valves. A throttle valve is mounted in the flow line and monitoring and control devices are installed for the safety shut-off system of the well - low- and high-pressure control valve and a fuse link. The well pads are connected to a station or unit of a station for controlling shutting-off devices of the X-mass tree and underground cut-off device. The control station is provided with a pump-accumulator unit and is connected through an actuating medium to the control unit of well shutting-off devices. The pump-accumulator unit is fitted with a group of pumps supplied by a container of actuating medium and a power functional hydropneumatic accumulator, connected to a high-pressure line. The control unit is fitted with power lines for functional control of shutting-off devices and a logical control line for the said shutting-off devices connected to them through trigger mechanisms. Trigger mechanisms control on/off switching of pressure in the said functional control power lines. Oil extraction processes are controlled with provision for, if necessary, automatic well shutting off in the logical sequence: wing valve - casing valve - underground cut-off device with given gradually increasing delay of command transmission for closing the casing valve and underground cut-off device.

EFFECT: more reliable and accident-free operation of an oil field, reduced cost and simplification of the process of managing extraction of oil.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to the mining industry and can be used in exploiting gas fields through remote, automatic and manual control of well shutting-off devices. According to the method, output wells are drilled in a gas field and are equipped with possibility of formation of exploited pads, which are fitted with production casings, and flow columns are built in them, fitted with underground production equipment, including a controlled gas underground safety valve, and wellhead equipment, which includes an X-mas tree with shutting-off devices, including at least a wing valve and a casing valve. A throttle valve which regulates well flow rate is mounted on a flow line. Monitoring and control devices for the safety shut-off system of the well are mounted, which comprise a low- and high-pressure control valve and a fuse link. At least part of the well pad and gas field is connected to a station or unit of a station for controlling shutting-off devices of the X-mas tree and underground safety valve, which contains a pump-accumulator unit with a power hydropneumatic accumulator and at least one control unit serving the well, with power lines for functional control of actuating mechanisms of shutting-off devices. The power lines are connected to a logical control line, which is provided with at least triple backed-up trigger mechanisms, two of them which are operated by a pulse, transmitted for shutting off the well in case of fire or critically low or high pressure in the flow line. A system has been designed for shutting off the well in a fluid cut-off logical sequence: "wing valve - casing valve - underground safety valve", which operates through a system for delaying transmission of the shut-off command. There is a tandem of the control hydropneumatic accumulator and a throttle in the logical control line in sections for interaction with power lines for functional control of actuating mechanisms of the casing valve and the underground safety valve.

EFFECT: more reliable and accident-free operation of a gas field, reduced cost of extracting gas, simplification of processes due to automatic control of well shutting-off devices.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to oil and gas industry, particularly to devices which provide for uninterrupted operation of oil or oil-and-gas wells, characterised by annular gas show. The wellhead check valve comprises a hollow body, fitted with a supply pipe for the main component - formation fluid, mainly oil, and a supply pipe for the released component, mainly annular gas, as well as a supply pipe for the mixture of the main and released components. An internal unit is mounted inside the housing of the check valve, with a cup-shaped body, which has one channel in its side wall for releasing annular gas. The check valve also includes a shutting-off device inside the cup, with movable and immovable parts and dividing its cavity into an inlet part in front of the shutting-off device and a working part behind the shutting-off device in the direction of flow of the annular gas, linked to the stream of formation fluid through a channel in the side wall of the cup. The shutting-off device is mounted in the cup and its immovable part rests on the side wall of the cup of the internal unit of the check valve.

EFFECT: provision for uninterrupted operation of the well due to the check valve, which can wash the cup of the internal unit of the check valve with warm formation fluid, virtually on the entire perimeter during the entire operation period, as well as provision for an optimum thermal mode for any unfavourable external conditions.

20 cl, 11 dwg

Oil well pad // 2367772

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of an oil well pad. The oil well pad comprises at least two oil wells, each of which contains an extracting column with a flow column with underground production equipment, containing at least circulating and shear valves, non-freezing return valve and, if necessary, a separation column, meant for separating oil and water, as well as a remote controlled device for cutting off flow of oil, made with an actuating mechanism, wellhead with wellhead equipment, with a column head, tubing head, on which an X-mas tree is mounted, which comprises shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter for controlling flow, made with an actuating mechanism, and monitoring and control elements - fuse link and a low- and high-pressure valve. Each well is linked through its shutting-off devices to a control station, which comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator linked through the actuating medium of the high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve and the cut off device, supplied by the said high-pressure line through pressure regulators, and controls their operation through a time-stepped system for command transmission for at least closure of a well in the logical sequence: "wing valve - casing valve - cut off device" - logical control line, linked to the fuse link and low- and high-pressure control valve and fitted with hydraulic control valves which can back up command transmission for closure of each well. One of the hydraulic control valves transmits a command for closing each well to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control, respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and the cut off device, where the delay mechanisms comprise a hydropneumatic accumulator and a throttle, which provide for closure of each well at different times. The power line for functional control of the actuating mechanism of the throttle valve is provided with a three-position distribution valve, preferably with two electromagnets.

EFFECT: more reliable and accident-free operation of oil wells, which are part of an oil well pad, reduced cost of extracting oil and much easier control of processes.

16 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to reservoir engineering and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of gas field wells. The equipment contains a control station for shutting-off devices of the well, more specifically wing and casing valves, fitted on wellhead equipment, choke valve, underground safety valve, with actuating mechanisms, as well as a valve for controlling low and high pressure and a fuse link. The control station includes at least one control unit for actuating mechanisms for shutting off devices, a pump-accumulator unit with and actuating medium, mainly in form of liquid, power lines for functional control of the said actuating mechanisms and a logical control line, which can provide for command transmission for at least shutting off the well in a logical sequence: wing valve - casing valve - underground safety valve, fitted for this system for double selective actuation, respectively, of the low pressure and high pressure control valves, fuse link, either remote or manual command for closing shutting off devices of the well. For this purpose the said line is also provided with a timed three-step actuating system with slow transmission of actuation command for at least closure of casing valve and underground safety valve, including logical control lines in at least sections for controlling the casing valve and the underground safety valve, different time-tuned command transmission delay mechanisms, consisting of a combination a hydropneumatic accumulator and a choke, fitted in series in the said sections. The pump-accumulator unit has a tank with actuating medium and a group of pumps.

EFFECT: more reliable and accident-free operation of the well, reduced cost of extracting oil and gas and much easier control of processes.

15 cl, 3 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: device has hollow cylindrical body with conical aperture for letting through geophysical device with cable, replaceable pressurizing insert, mounted in aperture of body, fixed and containing upper circular segments. Two moveable compacting collars are made with possible radial displacement relatively to cable axis in the moment of cable pressurization. Moveable compacting collars are supported by lower circular segments, each of which is rigidly connected to rod, having threaded end, directed outwards and connected to pressing nut, providing for transfer of compacting collars into compressed state in case of well mouth pressurization. Also present is circular disk with longitudinal groove for inserting cable and outer surface, being in contact to surface of aperture of hollow cylindrical body. Threaded ends of rods are outputted outwards through circular disk. Aperture of hollow cylindrical body is made conical. In assembled form in moment of well mouth pressurization circular disk, moveable compacting collars and circular segments form a conical surface on the outside, matching conical aperture of hollow cylindrical body and are in contact with it. The insert is held by cylindrical stops.

EFFECT: simplified construction, higher reliability.

11 dwg

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