Equipment system for gas field well controlling

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

 

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

From prior art it is known device to control 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 third valve, and the device has a second isolating valve and the third valve (SU 1535970, E21B 34/16, 47/10, 15.01.1990).

Also known hydraulic control system of an 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, additional feedback and additional distributor which is located the Yong inlet shut-off valve on the main pressure line with connection of the latter with sink, moreover, 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 complex 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-pressure and main pressure line through the reverse valves, and on the site an additional pressure line between the check valve and additional GI is reaccumulation parallel installed pressure switch, associated with an additional valve (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 oil and gas wells, due to partial or complete lack of multivariate duplication systems, initiating a 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 and drives well field, or provide at least disposable include all mechanisms required for resuming operation of the well after it was deactivated.

C is the Lodge of the present invention is to improve reliability and trouble-free operation of wells oil and gas field, reducing the cost of production of oil and gas fluid and for greater ease of process control.

The problem is solved due to the fact that the complex equipment to control at least one containing the shut-off bodies, wells oil and gas field according to the invention contains a control station shut-off bodies well, namely the lateral and nadkarni valves installed at the wellhead regulating the flow rate of the throttle valve, underground valve with actuators and valve control low and high pressure and fuse box, and the control station includes at least one block of the actuator control valve bodies, pump-and-accumulator installation with a working medium, mainly in the form of a fluid power line and functional management mentioned actuators and line logic control performed by providing the possibility of passing teams, at least, to close the well in a logical sequence side valve - nazarena valve - underground shutoff valve equipped for this system dubbed selective actuation from actuation respectively of the valve which controls the low and high pressure, a fuse, either remote or manual commands for closing the shut-off bodies well, what this line is equipped with three-stage system in time with the slow passing of the Executive team, at least on the closing nadkarni valves and underground valve-stopping mechanism includes established, at least in the areas of management nadkarni valve and valve line logic control raznomastnye time moderators passing team, consisting of a combination of sequentially installed on the specified areas of governors of the hydropneumatic accumulator and throttle, with pump-and-accumulator unit is supplied tank with the working fluid, and a pump unit, at least one pump.

When this power line and functional management of the Executive mechanism of the valve-stopping mechanism may be provided with a pressure multiplier implemented with redundancy for the first and second climatic zones, and pump-and-accumulator unit is supplied power functional hydropneumatic accumulator, made mainly modular sectional.

The Central control unit can be placed at a distance from the control station and reported her line, for example, fiber optic cable or for the channel, moreover, the control station shut-off bodies well designed to be placed in at least one case, in which are mounted mentioned pump-and-accumulator installation and at least one above-mentioned control unit, the station also equipped with a harness as mentioned control lines provided on the working body with the Executive mechanisms of the locking bodies well.

As a working body can use fluid temperature viscosity and freezing point of which is determined by the climatic conditions of the well, while the station is designed to work in the third and fourth climatic zones as the working fluid include, mainly, mineral oil, and for the first and second climatic zones as a working body adopted a liquid with a low freezing point, mainly type silicon, for example polymethylsiloxane and tank for the working medium 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 console management at this level sensor is equipped with a signal system on the maximum allowable and critical levels or connected to the system Central control unit that outputs to the Andes to maintain the liquid level in the tank at specified levels, 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.

Pump group may include at least one pump, mainly the pump 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 on-line high-pressure - discharge line through the input and output filters, preferably, coarse and fine cleaning, respectively, and each of the said pump outlet is equipped with a safety pressure valve and is mounted with the possibility of election-off from the discharge line through a system of locking devices, moreover, at least installed at the output of the filters has a visual indicator and/or electrical sensor in communication with the Central control unit, while the pumping group, provided at the output devices start or stop a motor pump and a check valve provided through the latter on the discharge line from the executed module-sectional power functional hydropneumatic accumulator, sostojashie is of the parallel-connected to the collector modules and designed to create a working pressure in the power lines of functional control of actuators, thus the collector hydropneumatic accumulator reported on the working body with the discharge line, in addition, these devices start or stop a motor pump connected to the discharge line, made 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 power modules functional hydropneumatic accumulator performed with membrane or, preferably, piston separator environments, while the total working volume of all modules mentioned hydropneumatic accumulator adopted not less than required for a single opening all locking bodies no less than one well or maintain the operating condition of the well for at least than one month in the absence of electricity.

To the discharge line through the pressure regulators reduce the pressure from the functional 10-100 MPa to working from 0.5 to 70 MPa, can be connected to the power line functional control of actuators nadkarni, side valve, throttle valve and line logic control, including the line of control valve high and low pressure and a fuse, in addition to the discharge line, mainly, not less than one mentioned the multiplier, increasing functional is e pressure to the desired no less 21-70 MPa, connected power line and functional management of the Executive mechanism of the valve-stopping mechanism, which has at least one pressure regulator configured to supply working fluid in the multiplier with the gear of the latter and the desired output pressure of the working fluid for subsequent delivery and management of the Executive mechanism of the valve-stopping mechanism, all power lines functional actuator control valve bodies are equipped with installed on sites before actuators safety valves pressure.

The control station may include a system of automatic protection of well system and remote system manual shutdown of wells, and automatic protection system contains connected to line logic control via hydraulic control valve is a line fuse and similarly connected to the same control line through another hydraulic control valve line valve control low and high pressure, the valve control low and high pressure set in the zone adjacent to the wellhead, preferably, on the train, both of these lines are equipped with relays or pressure sensors with the ability is idaci signal to the Central control unit about disabling wells respectively by fire, or by reason of outside the range of operating pressures in the train, determined by the setting of control valve high and low pressure; similarly, in line logic control series hydraulic distribution valves for remote shutdown for manual closing of the mentioned working bodies of the well - side of the valve nadkarni valves and valve-stopping mechanism.

Line logic control can be connected in series on the working body through hydraulic distribution valves to maintain a logical sequence of well control valves-valve power lines functional control of actuators, including, at least, of the valve-stopping mechanism, nadkarni valves, 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 on the parts of her interactions with power lines functional actuator control valve-stopping mechanism and nadkarni valves installed mentioned control pneumohydroaccumulators with the possibility of their interaction on the pressure relief each with its throttle, while managing p is imageprocessor on the plot control valve line logic control configured to slow the closing of the 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 seconds.

On line logic control at the site of its supply to the power line functional control actuator side of the valve can be installed solenoid valve remote switching on and off of the side of the valve.

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

Distribution valves of all power lines and functional management can be skommutirovany with the line of discharge of the spent working fluid, the vent line communicated mainly through the filter to the tank of the working fluid.

On power lines functional actuator control valve bodies can be installed thermal relief valves, skommutirovany on the output line reset excess working fluid released when the temperature of the working fluid and/or the environment.

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

The locking bodies wells may be equipped with control devices which, located on the front panel of the control unit.

Wardrobe management station can be performed insulated and explosion, and the connection cable lines to the Cabinet is made through cable outlets explosion-proof execution.

The technical result provided by the present set of features is to improve reliability and trouble-free operation of wells oil and gas field, reducing the cost of production of oil and gas fluid, the greater ease of control of technological processes at the expense of the proposed equipment for well control, namely automated control shut-off bodies bore - side and nadkarni valves, regulating the flow rate of the throttle valve, 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 serving the well control unit with power lines and functional departments actuators valve bodies, and the ends tied with them logical control line, equipped with not less than three times duplicated command valves, including two of which are from the pulses delivered to the freight wells when there is a risk of fire or supercritical low or high pressure in circuit, as well as the developed system close the well in a logical sequence clipping fluid side valve - nazarena valve - shutoff valve, working through the system slowing down the passing team at the closing, including tandem from the control of the hydropneumatic accumulator and orifice in a logical line management on sites of interaction with power lines functional control of actuators nadkarni valves and valve-stopping mechanism.

The invention is illustrated by drawings, where:

figure 1 shows the connection diagram of the control station shut-off bodies to the borehole;

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

figure 3 - control unit hydraulic schematic diagram.

Complex equipment to control at least one shut-containing bodies wells oil and gas field contains control station shut-off bodies well, namely the side gate valve 1 and nadkarni valve 2 installed on the wellhead 3, regulating the flow rate of the throttle valve 4, an underground valve (not shown)having actuators and valve 5 control low and high pressure and fuse box 6.

Also the complex is orogovenia contains a Central control unit, placed at a distance from the control station and reported her communication line, such as fiber optic cable.

The control station includes at least one unit 7 actuator control valve bodies, pump-and-accumulator 8 installation with a working body, power lines 9-12 functional management mentioned actuators and line 13 logic control performed by providing the possibility of passing teams, at least, to close the well in a logical sequence side gate valve 1 - nazarena valve 2 - underground shutoff valve equipped for this system dubbed selective actuation from actuation respectively of the valve 5 control low and high pressure, a fuse 6, either remote or manual commands closing the shut-off bodies well. To do this, line 13 logic control is equipped with three-stage system in time with the slow passing of the Executive team, at least on the closing nadkarni valve 2 and an underground valve-stopping mechanism includes installed, at least on the section 14 of the control nadkarni valve 2 and section 15 of the control valve line 13 logic control raznomastnye on lie is neither the moderators passing team, consisting of a combination of sequentially installed on these parts 14, 15 of governors of the hydropneumatic accumulator 16 and inductor 17.

Power line 12 function control actuating mechanism of the valve-stopping mechanism provided with not less than one multiplier 18 pressure. The multiplier 18 pressure to the first and second climatic zones are made with duplication.

Control station shut-off bodies well designed to be placed in at least one of the rack 19, which are mounted pump-battery installation 8 and at least one control block 7, the station also equipped with a harness as mentioned control lines provided on the working body with the Executive mechanisms of the locking bodies well.

Pump-and-accumulator installation 8 includes a tank 20 with a working body, mainly in the form of liquid and power functional hydropneumatic accumulator 21, made mainly modular sectional.

As a working medium fluid temperature viscosity and freezing point of which is determined by the climatic conditions of the well, while the station is designed to work in the third and fourth climatic zones as the working fluid include, mainly, mineral oil, and for the first and the second is somaticheskih zones as a working body adopted a liquid with a low freezing point, mainly, type silicon, for example polymethylsiloxane.

Tank 20 to the working fluid 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, while the level sensor is equipped with a signal system on the maximum allowable and critical levels or connected to the system Central control unit, issuing a command for maintaining the liquid level in the tank 20 at a given level, and for the first and second climatic zones of the tank 20 of the working fluid supplied by the fluid heater, made in the form of a coil or heating element.

Pump-and-accumulator installation 8 includes a pumping group, at least one pump 22, predominantly pump high pressure, preferably an axial piston with asynchronous motor 23 is doubled for the first and second climatic zones, at least one additional parallel connected electric pump 22 high pressure. The specified pump 22 or the pumps included in line 24 high-pressure - line pressure through the inlet filter 25 and the output filter 26 preferably coarse and fine cleaning, respectively. Each of these pumps 22 at the outlet is equipped with a safety valve 2 pressure and is mounted with the possibility of selective disconnection from the discharge line 24 through a system of locking devices, for example, ball valves 28. At least, installed at the output of the filters 26 fine cleaning has a visual indicator and/or electrical sensor in communication with the Central control unit. The pumping group, provided at the output devices start or stop motors, pumps and non-return valve 29, communicated through the last line 24 discharge with modular sectional power functional hydropneumatic accumulator 21, consisting of parallel-connected to the collector 30 of the modules 31 and designed to create a working pressure in the power lines 9-12 functional control of actuators. The collector 30 with hydropneumatic accumulator 21 reported on the working body with the discharge line 24. These devices start or stop a motor pump connected to the discharge line 24 made, for example, in the form of relay 32 pressure, either in the form of analog pressure sensors, either in the form of electrical contact pressure gauges. Modules 31 functional power of the hydropneumatic accumulator 21 is made with the membrane or, preferably, piston separator environments. The total working volume of all modules 31 of the said hydropneumatic accumulator 21 adopted not less than required for a single opening all locking bodies no less than one well or under what the actual content of the operational status of the well for a period of not less than one month in the absence of electricity.

To the discharge line through the regulators 33 pressure, decreasing the pressure from the functional 10-100 MPa to working from 0.5 to 70 MPa, connected to the power line 11, 10, 13 functional management respectively actuators nadkarni valve 2, the side of the valve 1, the throttle valve 4 and line 13 logic control, including line 34, 35, respectively, of the valve 5 control low and high pressure and fuse block 6. To the discharge line 24, predominantly, not less than one referred to the multiplier 18, which increase functional pressure to the desired no less 21-70 MPa, connected to power line 12 function control actuating mechanism of the valve-stopping mechanism which includes at least one controller 36 of the pressure that is configured to supply the working fluid in the multiplier 18 with the gear of the latter and the desired output pressure of the working fluid for subsequent delivery and management of the Executive mechanism of the valve-stopping mechanism.

All power lines 9-12 functional actuator control valve bodies are equipped with installed on sites before actuators safety valves 37 pressure.

Unit 7 control station provides automatic protection wells, the system on the station and system hand-off well. Automatic protection system contains connected to the line 13 logic control through hydraulic distribution valve 38 line 35 fuse 6 and similarly connected to the line 13 control through another hydraulic control valve 39 line 34 of the valve 5 control low and high pressure. Valve 5 control low and high pressure set in the zone adjacent to the wellhead, preferably, on the train. Both of these lines 34 and 35 provided with a relay 40 or pressure sensors with the capability of issuing a signal to the Central control unit about disabling wells, respectively, by fire, or by reason of outside the range of operating pressures in the plume, defined by the setting of valve 5 control low and high pressure. Similarly, in line 13 logic control series hydraulic distribution valves 41, 42, respectively, for remote shutdown for manual closing of the mentioned working bodies of the hole - side gate valve 1, nadkarni valve 2 and the valve-stopping mechanism.

Line 13 logic control sequentially connects on the working body through hydraulic distribution valves 43-45 to maintain a logical sequence of well control valves-distribute and 46-48 power lines 12, 11, 10 functional control of actuators, including, at least, of the valve-stopping mechanism, nadkarni valve 2, the side of the valve 1 with a valid closure in particular, namely in the opposite sequence with adjustable set valid time intervals between outages every one of them, why on line 13 logic control on the parts of her interactions with power lines 12, 11 functional management respectively actuators of the valve-stopping mechanism and nadkarni valves installed mentioned control pneumohydroaccumulators 16 with the possibility of their interaction on the pressure relief each with its orifice 17. Managing the hydropneumatic accumulator 16 on the section 15 of the control valve line 13 logic control configured to slow the closing of the valve, shutoff time, 1.5-2 times the interval between closing nadkarni valve 2 and the side of the valve 1, comprising from 10 to 120 seconds.

On line 13 logic control at the site of its supply to the power line 10 function control actuator side of the valve 1 is mounted a solenoid valve 49 remote switching on and off of the side of the valve 1.

Power line 12 functionalproperty actuator of the throttle valve 4 is equipped with three-position valve 50, preferably, the two electromagnets.

Distribution valves of all power lines 9-12 functional management skommutirovany line 51 of the discharge of the spent working fluid, and the line 51 reset communicated mainly through the filter tank 20 of the working fluid.

On power lines 9-12 functional actuator control valve bodies set temperature relief valves 52, skommutirovany on the output line 51 of the discharge of excess working fluid released when the temperature of the working fluid and/or the environment.

Pump-and-accumulator installation 8 are mainly made with the front panel.

The locking bodies well equipped with control devices located on the front panel of the control unit.

The Cabinet 19 control stations made of insulated and explosion, and the connection cable lines to the Cabinet is made through cable outlets explosion-proof execution.

Work is carried out as follows.

Pump-and-accumulator installation 8 is designed to create and maintain the desired operating pressure of the working medium in the line control station.

The working environment of the tank 20 with a volume of about 200 l through a pipeline that goes through the coarse filter 25 and the valve 53 to the input elec is ronsos 22, which is driven by a motor 23. At the outlet of the pump after the valve 28 is fine filter 26.

A relief valve 27 is configured to set the working pressure 21 MPa and in excess of a predetermined value of pressure connects the discharge line 24 with the cavity of the tank 20, reset the excessive volume of the working medium in the line 51 is reset.

Through the check valve 29 from line 24 discharge the working medium enters the collector 30 and fills the modules 31 functional power of the hydropneumatic accumulator 21 for storing an adequate supply of working medium under pressure, with each module 31 is made with a volume of 40-50 HP

After filling of the hydropneumatic accumulator 21 working environment through pipelines comes in lines 9-12 functional control of actuators locking bodies well and in line 13 logic control.

The controller 36 of the pressure in the power line 11 function control actuating mechanism of the valve-stopping mechanism lowers the pressure in the discharge line 24 to 21 MPa to a pressure of three or four times the pressure at the output of multiplier 18, which provides the working pressure in the line 11 function control actuating mechanism of the valve-stopping mechanism, equal to 28 MPa (280 kgf/cm2). The relief valve 37 is configured to weight the Noah working pressure 28 MPa and in excess of a predetermined value of pressure connects the line 11 with the cavity of the tank 20, reset the excessive volume of the working medium in the line 51 is reset.

Regulators 33 pressure pressure reducing power line 12 function control actuating mechanism of the throttle valve 4 and line 13 logic control to a working pressure of 4 MPa (40 kgf/cm2), and in the power lines 9, 10 functional management respectively actuators side and nadkarni valves - up to 14 MPa (140 kgf/cm2). Safety valves 37 are configured on the specified working pressure of 4 MPa and in excess of a predetermined pressure to connect said line with the cavity of the tank 20, reset the excessive volume of the working medium in the line 51 is reset.

In block 7 of the station management, the working environment at a pressure of 4 MPa in line 13 logic control is transferred to the input of the normally closed hydraulic distribution valve 38, designed for pressure relief of the control in case of fire. After filling line 35 fuse the control valve 38 opens, and fluid is fed to the input of the normally closed hydraulic distribution valve 39, which is intended to reset the control pressure when the valve 5 control low and high pressure set in line 34 of the said valve. Then, the working medium passes through the normally open what s the control valve 41, designed for remote switching all wells, and the control valve 42, designed for manual emergency shutdown of the entire borehole through emergency shutdown.

After the distribution valve 42, the working medium is fed to the input of the normally closed valves 43 hydraulic and manual override.

With a full line 35 fuse pressure switch 40 outputs a signal to the Central control console.

With a full line 34 of the control valve high and low pressure other pressure switch 40 provides a signal to the Central control console.

Further, in order to open the hole you need to perform the following steps:

- pull the handle distribution valve 43, which is placed on samaritana and working environment through the check valve 54 is supplied to the valve actuator valve 46, which opens, and fluid from the power line 11 function control actuating mechanism of the valve-stopping mechanism arrives at its Executive mechanism. Is the opening of the valve-clipper;

- pull the handle of the distribution valve 44, which is placed on samaritana and working environment through the check valve 55 is supplied to the valve actuator valve 47, which opens, and working the environment from the power lines 9, 10 functional management respectively actuators side and nadkarni valves is supplied to the actuator nadkarni valves. Is the opening nadkarni valve;

- pull the handle distribution valve 45, which is placed on samaritana and working environment through the check valve 55 and the normally open electromagnetic valve 49 is supplied to the valve actuator valve 48, which opens, and fluid from the power lines 9, 10 functional management respectively actuators side and nadkarni valves is supplied to the actuator side of the valve. Is the opening side of the valve.

An example of closure works well

The system auto-protect

At typical values of the pressures in the lines 34, 35, respectively, of the valve 5 control low and high pressure and fuse 6 wells of the control valve 39 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 39 moves to the closed position, reset the working environment of the power lines 9, 10, 11 functional management respectively actuators side, nadkarni valves and Labanauskas. Chokes 17 with pneumopericardium 16 serve to regulate the time interval in the sequential closing of the shut-off bodies well.

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 of a fuse, after which the control valve 38 moves to the closed position, reset the working environment of the power lines 9, 10, 11 functional management respectively side, nadkarni valves and valve-stopping mechanism. Chokes 17 with pneumopericardium 16 serve to regulate the time interval in the sequential closing of the shut-off bodies well.

System remote shutdown wells

In block 7 of the control station is equipped with the control valve 41, executed solenoid, and the solenoid valve 49, controlled from the control panel station, or from the Central control console.

When signal 24 In the actuator valve 41 is remote closing side, nadkarni valves and valve-stopping mechanism.

When signal 24 In the electric valve 49 is remote closing side of the valve.

Control throttle valve

When submitting the atragene on the first three-position solenoid valves 50 working pressure up to 4 MPa from the power line 12 function control actuating mechanism of the throttle valve is in its Executive mechanism. From the positioner mounted on said valve, receives the analog signal in the Cabinet 19 control or Central control. Then from the Cabinet 19 receives the signal at a first electromagnet (tension) and the valve 50 is transferred to the neutral position. If necessary, reduce the flow of produced fluid from Cabinet control signal to the second solenoid valve 50, resets the working environment to the specified parameters.

Thus, the claimed range of equipment provides improved reliability and trouble-free operation of wells in the extraction of oil and gas fluid.

1. Complex equipment to control at least one containing the shut-off bodies, wells oil and gas field, characterized in that it contains a control station shut-off bodies well, namely the lateral and nadkarni valves installed at the wellhead, a throttle valve for regulating the flow wells, underground valve with actuators and valve control low and high pressure and fuse box, and the control station includes at least one block of the actuator control valve bodies, pump-and-accumulator installation of the work body mostly in the form of liquid, power line and functional management mentioned actuators and line logic control performed by providing the possibility of passing teams, at least, to close the well in a logical sequence: side valve - nazarena valve - underground shutoff valve equipped for this system dubbed selective actuation from actuation respectively of the control valve high and low pressure, a fuse, either remote or manual commands for closing the shut-off bodies well, what this line is equipped with three-stage system in time with the slow passing of the Executive team, at least on the closing nadkarni valves and underground valve-stopping mechanism includes established, at least in the areas of management nadkarni valve and valve line logic control, raznomastnye time moderators passing team, consisting of a combination of sequentially installed on the specified areas of governors of the hydropneumatic accumulator and throttle, with pump-and-accumulator unit is supplied tank with the working fluid, and a pumping unit with at least one pump.

2. The set of equipment according to claim 1, distinguishing the I, that power line and functional management of the Executive mechanism of the valve-stopping mechanism is equipped with a pressure multiplier implemented with redundancy for the first and second climatic zones, and pump-and-accumulator unit is supplied power functional hydropneumatic accumulator, made mostly modular sectional.

3. The set of equipment according to claim 1, characterized in that the Central control panel is installed at a distance from the control station and reported her line, for example, fiber optic cable or radio channel, and the control station shut-off bodies well designed to be placed in at least one case, in which are mounted mentioned pump-and-accumulator installation and at least one above-mentioned control unit, the station also equipped with a harness as mentioned control lines provided on the working body with the Executive mechanisms of the locking bodies well.

4. The set of equipment according to claim 1, characterized in that the working fluid is used, the temperature, the viscosity and freezing point of which is determined by the climatic conditions of the well, while the station is designed to work in the third and fourth climatic zones, as a working body equipped primarily to the military mineral oil, and for the first and second climatic zones as a working body adopted a liquid with a low freezing point, mainly type silicon, for example polymethylsiloxane and tank for the working medium 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, while the level sensor is equipped with a signal system on the maximum allowable and critical levels or connected to the Central control panel with the capability of issuing commands to maintain the liquid level in the tank at specified levels, and for the first and second climatic zones working tank body provided with a fluid heater, made in the form of a coil or heating element.

5. The set of equipment according to claim 2, wherein the pump includes at least one pump, mainly the pump high pressure, preferably an axial piston type 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 on-line high-pressure - discharge line through the input and output filters preferably the coarse and fine cleaning, respectively, each of these pumps outlet is equipped with a safety pressure valve and is mounted with the possibility of election-off from the discharge line through a system of locking devices, and at least installed at the output of the filters has a visual indicator and/or electrical sensor in communication with the Central control unit, while the pumping group, provided at the output devices start or stop a motor pump and a check valve provided through the latter on the discharge line from the executed module-sectional power functional hydropneumatic accumulator, consisting of parallel-connected to the collector modules and designed to create a working pressure in power lines functional control of actuators, and the collector hydropneumatic accumulator reported on the working body with the discharge line, in addition, these devices start or stop a motor pump connected to the discharge line, made 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 power modules functional hydropneumatic accumulator performed with membrane or, preferably, piston separator cf is d, while the total working volume of all modules mentioned hydropneumatic accumulator adopted not less than required for a single opening all locking bodies no less than one well or maintain the operating condition of the well for a period of not less than one month in the absence of electricity.

6. The set of equipment according to claim 5, characterized in that the discharge line through a pressure regulator for reducing pressure from functional 10-100 MPa to working from 0.5 to 70 MPa, connected the power line functional control of actuators nadkarni, side valve, throttle valve and line logic control, including the line of control valve high and low pressure and a fuse, in addition to the discharge line mostly not less than one mentioned the multiplier to increase functional the required pressure for not less than 21-70 MPa, connected to the power line and functional management of the Executive mechanism of the valve-stopping mechanism, which has at least one pressure regulator configured to supply working fluid in the multiplier with the gear of the latter and the desired output pressure of the working fluid for subsequent submission and control actuator valve-adequate what I all power lines functional actuator control valve bodies are equipped with installed on sites before actuators safety valves pressure.

7. The set of equipment according to claim 1, characterized in that the control unit of the station contains a system of automatic protection of well system and remote system manual shutdown of wells, and automatic protection system contains connected to line logic control via hydraulic control valve is a line fuse and similarly connected to the same control line through another hydraulic control valve line valve control low and high pressure, the valve control low and high pressure set in the zone adjacent to the wellhead, preferably on the train, both of these lines are equipped with relays or pressure sensors with the capability of issuing a signal to the Central remote control about disabling wells, respectively, by fire, or by reason of outside the range of operating pressures in the plume, defined by the setting of control valve high and low pressure; similarly, in line logic control series hydraulic distribute the performance communications valves for remote shutdown for manual closing of the mentioned working bodies of the well - side of the valve nadkarni valves and valve-stopping mechanism.

8. The set of equipment according to claim 1, characterized in that the line logic control sequentially connects on the working body through hydraulic distribution valves to maintain a logical sequence of well control valves-valve power lines functional control of actuators, including, at least, of the valve-stopping mechanism, nadkarni valves, 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 on the parts of her interactions with power lines functional actuator control valve-the web clipper and nadkarni valves installed mentioned control pneumohydroaccumulators with the possibility of their interaction on the pressure relief each with its throttle, while managing the hydropneumatic accumulator on the plot control valve line logic control configured to slow the closing of the valve, shutoff time, 1.5-2 times the interval between closing nadkarni valves and gate valves, constituting from 10 to 120 C.

9. The set of equipment according to claim 1, characterized in that on-line logic control at the site of its supply to the power line functional control actuator side of the valve has a solenoid valve for remote switching on and off of the side of the valve.

10. The set of equipment according to claim 1, characterized in that the power line functional control actuator throttle valve equipped with a three-position valve preferably with two electromagnets.

11. The set of equipment according to claim 2, characterized in that the distribution valves of all power lines and functional management skommutirovany with the line of discharge of the spent working fluid, the vent line communicated mainly through the filter to the tank of the working fluid.

12. The set of equipment according to claim 11, characterized in that on the power lines functional actuator control valve bodies set temperature relief valves, skommutirovany on the output line reset excess working fluid released when the temperature of the working fluid and/or the environment.

13. The set of equipment according to claim 1, characterized in that the pump-and-accumulator installation is predominant is about to put the front panel.

14. The set of equipment according to claim 1, characterized in that the locking bodies are well equipped with control devices located on the front panel of the control unit.

15. The set of equipment according to claim 3, characterized in that the Cabinet control stations made of insulated and explosion, and the connection cable lines to the Cabinet is made through cable outlets explosion-proof version.



 

Same patents:

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 industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to conservation of gas wells under condition of abnormally low bed pressure (ALBP). According to the method of gas well conservation under condition of abnormally low bed pressure a bore hole of well is filled via a production tree, gates of the production tree are closed, and the well is conditioned under pressure; as fluid methanol water is used; volume of methanol water is determined from expression: Vl=π·D2in*(h1+h2)/4, where Vl is volume of mixture of methanol water, m3, Din - is internal diametre of the flow string, m, h1 is interval of perforated openings, m, h2 - is depth of a bottomhole, m.

EFFECT: eliminating contamination of the producing bed and facilitating gas inflow from the producing bed after completion of well conservation period.

1 ex, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to conservation of gas and gas condensate wells with high penetrability of producing bed under conditions of abnormally low bed pressure. The method of conservation of gas and gas condensate wells with high penetrability of the producing bed under conditions of abnormally low bed pressure consists in filling a borehole of the well with fluid through a production tree, in closing a gate of the production tree and in conditioning the well under pressure; also, methanol water is used as fluid; fluid additionally contains alumina-silicate micro-spheres at equal density of water and micro-spheres; volume of mixture of the said methanol water and alumina-silicate micro-spheres is determined from expression Vl=π·D2in*(h1+h2)/4, where Vl is volume of mixture of methanol water with alumina-silicate micro-spheres, m3, Din - is internal diametre of the flow string, m, h1 is interval of perforated openings, m, h2 - is depth of a bottomhole, m.

EFFECT: elimination of contamination of producing bed due to blocking producing bed, preventing pumped into well fluid penetration into producing bed, and facilitating withdrawal of gas flow from producing bed after completion of well conservation.

1 ex, 1 dwg

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

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to oil-and-gas industry, particularly to wellhead equipment with simultaneous separate exploitation of oil and gas wells. The dual string tubing hanger is a shut-off distribution unit, which consists of three discs joined by a threaded joint, where there are openings in the bottom and top discs, coaxial with channels of the tubing hanger of the first row of tubes. In the middle disc there are openings with diametre which is greater than the diametre of openings in the bottom and top discs and eccentric with them, into which are fitted disc shaped shutters with bypass openings, which coincide with openings in the bottom and top discs when the shutters are in open position. There are toothed sectors on the shutters, which interact with the gear shaft of the actuating mechanism, which rests on bearings, one of which is in the bottom disc and the other in the top disc, with a shank which juts out above the top surface of the top disc. Tubes of flow lines are joined to the thread, made on each opening of the top disc. Operating mode of the well can be regulated by opening either the first or second flow lines successively or both lines at the same time.

EFFECT: wider functional capabilities of the wellhead equipment.

1 cl, 2 dwg

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil and gas industry, particularly to method of pressure testing of well head accessories in well. The method consists in lowering a packer with a drive on a support pipe at rate not more, than 1 m/sec; the well above the packer is filled with fluid; the support pipe is pressurised at the well head; testing pressure with rate of build up 0.3-0.5 MPa/sec is created inside the well head accessories; these process conditions are held during not less, than 30 minutes; change of pressure is evaluated; the well head accessories are assessed for leak tightness or leakage; pressure in the well head accessories is dropped at rate not more, than 1 MPa/sec; the packer is released; fluid is discharged above the packer into the well; the packer with the drive and the support pipe are removed from the well at rate not more, than 1 m/sec.

EFFECT: increased accuracy of evaluating leak tightness of well head accessories at pressure testing.

2 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 industry.

SUBSTANCE: invention relates to oil-producing industry, particularly to method of sealing of well mouth. It includes mounting of preventer with casing head, allowing nozzle, on casing pipe, location nearby packer mouth with mechanical drive, taken out on original ground through the supporting pipe, insulation of bottom part of well against preventer by erection of packer, well filling higher than packer by process liquid, sealing through the preventer of supporting pipe, creation inside the preventer through the branch of casing head of testing pressure, implementation of technological isolation, pressure change valuation, conclusion about tightness or leakage of preventer, pressure release in preventer, depressurisation of preventer, packer releasing, discharge of process liquid from the space above packer into well and removing of packer with drive and supporting pipe from well.

EFFECT: providing of simplicity and reliability during operation, and also provides definition of preventer tightness on well.

2 dwg, 1 ex

FIELD: oils and gas production.

SUBSTANCE: group of inventions refers to methods and facilities for conservation, completion and repair of wells. The inventions facilitate control over the well during the said operations by means of assembling system of two partitions in well. Each of the partitions is located below the lower end of a flow string for well completion, when this string is installed into the well. As none of these partitions is installed higher in the borehole of the well, so both partitions rest in place during operations of conservation, completion and repair, which eliminates necessity to use a block of blowout preventers to facilitate reliable control over the well.

EFFECT: reduced cost of well construction due to reduced time required for operation of drilling rig.

44 cl, 23 dwg

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

Casing head // 2359105

FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented as control head at operation of oil and gas wells for sealing well head, for hanging stalk pipe string, for control over well operation mode, for shutting off and directing withdrawn production into manifold, and also for performing various process operations. The casing head consists of a cylinder case with upper and lower connecting flanges and with two upper and two lower side branches with connecting flanges for installation of gates, of a tube holder installed in the axial channel of the case, of an assembly for fastening and sealing tube holder in the axial channel of the case; also the casing head consists of a transition flange assembled on the cylinder case. Over the tube holder in the axial channel of the case there is installed a shutoff ball element with pass through axial and blind side channels, axes of which are mutually perpendicular, and also with upper and lower seats with packs located on spherical working surface of the seats. The unit of control over the shutoff ball element is made in form of a connected to it shaft, the axis of which is perpendicular to axes of pass through and blind side channels and passes through their cross point. Circular grooves are made on spherical working surfaces of the upper and lower seats; internal diametre of these grooves exceeds external diametre of seats packs made in form of gasket rings installed correspondingly above and below the said circular grooves. A groove is made on external cylinder surface of the upper seat; from one side this groove is connected with a channel for lubricant supply, made in the cylinder case of the tube head, while from the other side this groove is connected with the circular groove located on spherical surface of the seat by means of radial channels cut in the seat. The shutoff ball element has channels arranged along the axis of the pass through axial channel; also, when the shutoff ball element is open, holes of the said channels coincide with the circular grooves on working spherical surfaces of the seats, while one of these channels is connected with an additional channel made in the shutoff ball element. Its axis is perpendicular to the axis of the pass through axial channel. The shaft of the unit of control over the shutoff ball element is made in form of two coaxial shafts, ends of which have grooves; between ends of the shafts there is located a disk equipped with mutually perpendicular lugs made on its end surfaces for interacting with grooves of shafts. The said shafts and disks are made with axial grooves for communication with the additional channel of the shutoff ball element.

EFFECT: upgraded reliability of production tree.

2 dwg

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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