Well of hydrocarbon raw material deposit

FIELD: oil and gas industry.

SUBSTANCE: well of hydrocarbon raw material deposit, either gas one or gas-condensate one, includes production string with tubing string with underground operating equipment. Operating equipment includes at least a cutout valve with remote control, which is provided with an actuator, and well head with wellhead equipment. Wellhead equipment comprises casing head, tubing head on which there mounted is X-tree in the form of a fir tree, which includes shutoff members - master and side gate valves with actuators, as well as throttle valve adjacent to the latter, which controls the well flow rate and is provided with an actuator, and monitoring and control members - fuse insert and gas line pressure monitoring valve. Well is connected to control station by means of shutoff members, throttle valve and cutout valve. Control station is made in the form of a cabinet and includes pump accumulator plant and at least one control unit per well.

EFFECT: improving reliability and accident-free operation of gas well and simplifying the control of processes.

12 cl, 5 dwg

 

The invention relates to the oil and gas industry and can be used in the development of devices for the automatic control of technological processes and is intended to improve the reliability of operation of wells in the field of hydrocarbons, predominantly gas or gas condensate.

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

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 (ed. mon. The USSR 1535970, E21B 34/16, 47/10, 15.01.1990).

Also known hydraulic control system of an underwater wellhead containing a hydraulic actuating mechanism is of SMI, related 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 valve, 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 (ed. mon. The USSR 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 on which ysenia pressure 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 check valves and at 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 ed. mon. The USSR 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 trouble-free operation of 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 e is stranih 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, or provide 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 well fields of hydrocarbon raw materials, reducing the cost of production of raw materials and greater ease of process control.

This object is achieved in that the proposed well fields of hydrocarbon raw materials, mainly natural gas or condensate, according to the invention, includes operating the column with the column tubing with underground operational equipment containing, at least, made with actuator shutoff valve with remote control, wellhead wellhead, with the column head, tube head, on which there are mounted in the form of a Christmas tree wellhead equipment, including shut-organs - stem and side valves Executive fur the mechanisms, and adjacent to the last throttle valve for regulating the flow rate of the well, completed with the actuator, and the control and governing bodies - fusible insert and the valve control pressure in the pipeline, while the well is connected to the control station shut-off bodies, throttle valve and valve made structurally in the form of a Cabinet, and including a pump and an accumulator installation and at least one on the well control unit, and pump-and-accumulator installation includes pumping group and communicated with her on a working body line high pressure power functional hydropneumatic accumulator high pressure, and a control unit includes fed from said high pressure line, through the pressure regulators to reduce the functional pressure to the required level, power lines, functional actuator control valve bodies, throttle valve valve-stopping mechanism, while in the closet station is additionally mounted on the control line Daisy chain and, for example, flare valves, while Daisy and flare valves installed in the piping in the immediate vicinity of the control Cabinet, for example on one common frame, and the operation of shut-off and control valves of the wells, including the surrounding, at least, these underground shutoff valve, stem, lateral and flare valve, through the system step by slowing down the passage of commands, at least one opening is carried out in the following logical sequence: underground shutoff valve, valve stem, loop valve, side valve, closing the hole in the reverse order through the line logic control provided with the fusible link and valve pressure control and is equipped with the possibility of duplication of passing commands to the closing of the well hydraulic control valves, one of which has the possibility of transmission line logic control commands for closing wells from fuse, the other from the valve control pressure, and at least two other, respectively, from remote and manual control, with the system slowing down includes installed on the sites of interaction line of logic control with power lines functional actuator control valve stem and the valve-stopping mechanism moderators, including managing the hydropneumatic accumulator and orifice, providing a variety of on-time response to closing of wells, and power line and functional management Executive IU what Anisman valve-stopping mechanism is equipped with intensifier.

The placement of the flare valve system of technological and accidental spills and Daisy-valve system reset extracted formation fluid in the reservoir, pipelines in the vicinity of the control Cabinet, for example on one common frame with control Cabinet, can greatly reduce the area occupied by the specified equipment, significantly reducing installation time and maintenance of equipment at the well, which, ultimately, will lead to higher efficiency equipment.

The dynamics of the system control surface valves determine the characteristics of the additional pressure accumulators and adjustable chokes installed on the supply line of the working fluid in the actuator actuators, and are selected so as to ensure trouble-free closure of the wells in the specified sequence.

To exclude the effect of low temperatures on the performance of the station inside the Cabinet stations support a temperature that ensures smooth functioning of all system elements located in the closet.

To improve the reliability of plant operation at low temperatures produce the duplication of certain elements of the control system surface valves, in particular duplicate the work of the line "pump-pressure regulator - multiplier".

To simplify maintenance station working the body when closing the wells pass through the bypass drain line of the hydraulic system.

Control of the working conditions at the well, and closing wells with violations carried out through the use of hydraulic lines with destructible fusible link. In the case of changing the design of the operating modes, for example in case of fire in the hole, the insert is destroyed and automatically command is issued on the closing hole.

Control over observance of the operating conditions on the hole and close the hole when the violation carried out through the use of hydraulic control valves low and high pressures in gazokondensatnogo in which the command to close the well when the change of settlement conditions.

To improve the reliability of valves bore monitoring of compliance with operating conditions in the well, and closing wells with violations carried out through the use of hydraulic control valves low and high pressures in the pipeline while the valve overlap using pressure sensors placed on the gas.

For the implementation of this method proposed device containing the Cabinet station, in which Smondyrev the hydraulic system to control surface valves and underground valve wells, containing Instrumentation and automation, actuators, valves with actuator and the cavity input, output and drainage, established as on-line control stem and side valves and control lines underground esdv, and in the hydraulic system installed in the pressure accumulators connected to the working fluid tank, pumps, pressure regulators, multipliers and a piping for supplying the working fluid in the actuators side and stem gate valves, underground valves-off valves and valves governing the debit each well, while in the wardrobe additionally mounted on the control line Daisy chain and, for example, flare valves, while Daisy and flare valves installed in the piping in the immediate vicinity of the control Cabinet, for example on one common frame.

To optimize the structure mounted on the frame, at least one device for feeding inhibitor.

The dynamics of the system control surface valves determine the characteristics of the additional pressure accumulators and adjustable chokes installed on the supply line of the working fluid in the actuator actuators, and are selected so as to ensure trouble-free closing of wells in a given posledovatelno is I.

To improve the reliability of plant operation at low temperatures produce the duplication of certain elements of the control system surface valves, in particular duplicate the work of the line "pump - pressure regulator - multiplier".

To simplify maintenance station working the body when closing the wells pass through the bypass drain line of the hydraulic system.

Control of the working conditions at the well, and closing wells with violations carried out through the use of hydraulic lines with destructible fusible link. In the case of changing the design of the operating modes, for example in case of fire in the hole, the insert is destroyed and automatically command is issued on the closing hole.

Control over observance of the operating conditions on the hole and close the hole when the violation carried out through the use of hydraulic control valves low and high pressures in gazokondensatnogo.

For ease of installation and maintenance in the closet station is mounted several independent pneumatic-hydraulic systems to control surface valves and underground esdv gas wells connected to each other.

For ease of installation and service and repair hydraulic system is divided into nasalcease, each of which is mounted in a separate module and has connectors for otstykovki with the rest of the system.

To exclude the effect of low temperatures on the performance of the station inside the Cabinet stations support a temperature that ensures smooth functioning of all system elements located in the Cabinet, and the Cabinet is made insulated.

When the plant is operating at low temperatures for easy repair and maintenance work inside the Cabinet of the station are heated area for maintenance and repair of equipment station service personnel.

To reduce heat loss when opening station for the repair and routine maintenance of the internal cavity of the control Cabinet is divided into several parts, each of which has an opening panel and Cabinet door station is divided into several parts, with part of the door is installed with the possibility to open all the doors as a whole and separately for each part.

To simplify maintenance station working the body when closing the wells pass through the bypass drain line of the hydraulic system.

Control of the working conditions at the well, and closing wells with violations carried out through the use of hydraulic lines with destructible fuse insert is Oh. In the case of changing the design of the operating modes, for example in case of fire in the hole, the insert is destroyed and automatically command is issued on the closing hole.

The hydraulic system of the station introduced a line of control valves, high and low pressure in gazokondensatnogo for monitoring compliance with the operating conditions in the well and close the well when their violation.

Floors in the Cabinet is made in the form of cells, which in case of contact with the working fluid on the floor, there will be no contamination of the floor.

These significant features in conjunction characterizing the essence of the proposed technical solution, not currently known to the control device. Similar, characterized by the identity of all essential features of the claimed invention, in the course of the studies have been found that allow to make a conclusion on the conformity of the proposed technical solution the criterion of "Novelty".

The essential features of the claimed invention cannot be represented as a combination, identified from known solutions implementation in the form of the distinctive characteristics to achieve a technical result, which implies the conclusion that the criterion of "Inventive step".

Due to the fact that the proposed solution is intended for use in frames is Ah real system control surface valves Bush wells, made by the applicant and has been tested with the achievement of the claimed technical result, the present invention conforms to the criterion "Industrial applicability".

The invention is illustrated by drawings, where figure 1 shows a General view of the device for implementing this method, figure 2 - pneumatic-hydraulic circuit of the device, figure 3 - strapping wells with application of the proposed device, figure 4 is a pneumatic diagram of the device, figure 5 - scheme of binding wells with application of the proposed device.

On frame 1 of the module installed valve unit 2 and the Cabinet of the control station 3.

On the racks 4 are the pipes 5 and 6, the gas supply of the first and second gas wells, respectively, and the supply pipe inhibitor 7. One of the pipes, 5 or 6, is used as a backup, and application specific pipeline is determined by the placement of the module on the well.

On each pipeline 5 and 6 installed hydraulically operated Daisy valves 8, hydraulically operated flare valve 9, the gas meter 10, the pressure sensor 11 in the heat-insulated box 12, the control valve low pressure 13 in the heat-insulated box 14. Supply system inhibitor 15 each well is located on a separate rack and connects to the supply line inhibitor 7, accommodated the counters 4.

Under the pipelines 5 and 6 on the rack 4 mounted trays 16, 17, 18, 28, 29 for pulse tubes 19, power 20 and data cables 21 and 22. Pulse tube 19 in the amount of 20 pieces out of the control Cabinet 3, consisting of a control station and a remote communication system with the object, and are connected to the corresponding panel 23 located on the frame 1. Part of the tubes in quantity of 4 pieces is given to the left, the actuators are hydraulically controlled Daisy and flare valves 8 and 9 respectively, and the other, 16 pieces, is given the right to drive underground valve-stopping mechanism, stem valves, side valves (not shown), the angle of the throttle valve, the control valve low pressure, fuse tube, located on the wellhead.

Pulse tube going to the Christmas tree, are connected to the panel 24. On the uprights 4 of the frame 1 are boxes 25, 26 to connect the power and data cables. In the output part of the pipes 5 and 6, after the flare valve has two discharge shut-off valve 27.

The proposed method is implemented as follows. The pipes 5 and 6 of the module is connected to the wellhead equipment, on the one hand, and gas gathering manifold, on the other. Previously in pneumohemothorax pressure, combined with the working fluid tank, pump with pressure regulators and multipliers in pump-and-accumulator installation, create fluid pressure used in the control station as a working body. Using pneumopericardium pressure will maintain the pressure of the working fluid in the system in the event of a power station from the power supply, at least up to 3 times. Next, fluid under pressure is supplied through the pulse tube 19 in the actuators of valves each well, and the opening of the wellhead equipment and fixtures owned by the Bush wells for supply of formation fluid from the well into the reservoir is carried out in the following sequence: underground shutoff valve, valve stem, loop valve 8, the side latch. The extracted wireline fluid flows from the well into the pipes 5 and 6 and further to the gas manifold. The flow rate of the fluid measured by the flow meters of gas 10. When lowering the pressure of the fluid in the pipe below the specified trigger valve control low pressure 13 and sends the command to close the well.

To prevent hydrate formation in each pipeline 5 and 6 serves corrosion inhibitor from the supply pipe inhibitor 7, which is part of the supply system inhibitor 15.

The specified closing of the valve is carried out in reverse order, with the introduction of the system of locks both electric and hydraulic to ensure that specified the second sequence, with this algorithm the opening/closing wells set in advance, for example, by using the software.

Accommodation flare valves 9 systems of technological and accidental spills, for example, on a horizontal burner, Daisy valves 8 system reset extracted formation fluid in the reservoir, pipelines 5 and 6 in the immediate vicinity of the control Cabinet 3, for example on one common frame 1 with the control Cabinet 3, allows to considerably reduce the time for installation, configuration and testing of equipment, significantly reduce the area required for installation of the equipment for maintenance of the well. In this case, all the equipment, in particular flare 9 and Daisy valves 8, 10 meters, flow inhibitor 15, the control Cabinet 3, is mounted on one common frame 1, is checked and tested at the factory and ready to operate is supplied to the place of operation.

The flow of the working fluid in the actuators flare valves 9 and angle of the throttle valve is carried out as necessary, for example when you reset flow of formation fluids to the flare system or the regulation of the flow rate, respectively.

Automatic protection of the well when the pressure of gas in the pipeline and when the fire is two the schemes of protection - hydraulic, triggered from the control valve low pressure 13 and hydraulic fuse when there is no electricity, and electronic fired from duplicate sensors pressure on the string and redundant temperature sensors in the fire at the wellhead.

The dynamics of the control system shut-off and control valves determine the characteristics of the additional pressure accumulators and adjustable chokes installed on the supply line of the working fluid in the actuators actuators, and are selected so as to ensure trouble-free closure of the wells in the specified sequence.

To monitor the current state of the control Cabinet 3 and a module comprising a control unit provided for the measuring channels of analog signals and channels processing of discrete signals for connecting transducers and sensors included in the system control station and module, as well as channels for generation of control actions of the Executive bodies.

The liquid used as the working fluid, after use in the enforcement mechanisms of the system comes into a tank of the hydraulic working fluid is placed in the control Cabinet 3.

Conducted by the authors and applicant testing of a full-sized device confirmed the government is inost laid technological solutions.

The use of the proposed technical solutions will improve the reliability of valves all piping wells and reduce the costs associated with piping and exploitation of hydrocarbon deposits, mainly condensate, wells.

1. Well hydrocarbon deposits, predominantly gas or gas condensate, characterized in that it contains operating the column with the column tubing with underground operational equipment containing, at least, made with actuator shutoff valve with remote control, wellhead wellhead, with the column head, tube head, on which there are mounted in the form of a Christmas tree wellhead equipment, including shut-organs - stem and side valves with actuators, as well as adjacent to the last throttle valve for regulating the flow rate of the well, completed with the Executive mechanism, and a control-governing bodies - fusible insert and the valve control pressure in the pipeline, while the well is connected to the control station shut-off bodies, throttle valve and valve made constructively in the Cabinet and including a pump and recharge the ing the installation and at least one of an oil well control unit, and pump-and-accumulator installation includes pumping group and communicated with her on a working body line high pressure power functional hydropneumatic accumulator high pressure, and the control unit switches powered from said high pressure line, through the pressure regulators to reduce the functional pressure to the required level, power lines, functional actuator control valve bodies, throttle valve valve-stopping mechanism, while in the closet station is additionally mounted on the control line to be Daisy-chained, and, for example, flare valves, while Daisy and flare valves are installed on pipelines in the immediate vicinity of the control Cabinet, for example, on one common frame, and the operation of shut-off and control valves of the wells, including at least these underground shutoff valve, stem, lateral and flare valve, through the system step by slowing down the passage of teams, at least on the discovery, perform the following logical sequence: underground shutoff valve, valve stem, loop valve, side valve, closing the hole in the reverse order through the line logic control, the message is nnow with fusible link and valve pressure control and is equipped with the possibility of duplication passing commands to the closing of the well hydraulic control valves, one of which has the possibility of transmission line logic control command to close the hole from the fuse block, the other from the valve control pressure, and at least two other respectively from remote and manual control, with the system slowing down includes installed on the sites of interaction line of logic control with power lines functional actuator control valve stem and the valve-stopping mechanism moderators, including managing the hydropneumatic accumulator and orifice, providing a variety of on-time response to closing of wells, and power line and functional management of the Executive mechanism of the valve-stopping mechanism is equipped with intensifier.

2. Well hydrocarbon deposits according to claim 1, characterized in that the control Cabinet is mounted several independent pneumatic-hydraulic systems to control surface valves and underground esdv gas wells, United among themselves.

3. Well hydrocarbon deposits according to claim 2, characterized in that the hydraulic system is divided into several parts, each of which is mounted in a separate module, and has connectors for otstykovki with the rest of elementarization.

4. Well hydrocarbon deposits according to claim 1, characterized in that the enclosure of the station are insulated.

5. Well hydrocarbon deposits according to claim 1, characterized in that the inside of the closet station is equipped with heating elements to provide a predetermined temperature inside the Cabinet.

6. Well hydrocarbon deposits according to claim 1, characterized in that inside the Cabinet of the station are heated area for maintenance and repair of equipment station service personnel.

7. Well hydrocarbon deposits according to claim 1, characterized in that the internal cavity of the enclosure of the station is divided into several parts, each of which has an open panel.

8. Well hydrocarbon deposits according to claim 1, characterized in that closet door station is divided into several parts, with part of the door is installed with the possibility to open all the doors as a whole and separately for each part.

9. Well hydrocarbon deposits according to claim 2, characterized in that the hydraulic system Cabinet station performed the bypass drain line for transmission of a working body when closing the well back into the tank.

10. Well hydrocarbon deposits according to claim 2, characterized in that the hydraulic system introduced line with the melt in taukay, when the destruction of which is the closure of the well.

11. Well hydrocarbon deposits according to claim 2, characterized in that the hydraulic system introduced a line of control valves, high and low pressure in gazokondensatnogo.

12. Well hydrocarbon deposits according to claim 1, characterized in that the floor in the closet in the form of cells.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: opening and closing of shutoff-control valves of well cluster is performed by independent supply of working medium to actuators of shutoff-control valves and underground cutout valves in the specified sequence, as well as valves controlling the flow rate of each well. Method is implemented by means of control station mounted in the cabinet and including instrumentation and control, as well as hydraulic system. Hydraulic system includes pneumatic hydraulic pressure accumulators combined with working medium tank, pumps, pressure controls and multiplying gears, and has the possibility of controlling actuators of shutoff-control valves with time delay and in certain sequence. At that, in addition, control lines of loop and flare gate valves are mounted in cabinet of the station, which are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: invention simplifies mineral deposit production control process, as well as allows reducing the area occupied with process equipment.

21 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: single wells or wells forming clusters are drilled; production wells are equipped with wellhead equipment with X-tree including at least one side gate valve and one master gate valve, as well as underground cutout valve and throttle valve and monitoring and control members, which are installed on the loop, for example, fuse strip and gas line pressure monitoring valve. Operation of the well is performed at simultaneous control of production processes of hydrocarbons by means of the station. Control processes involve opening and closing of shutoff-control valves of well cluster by independent supply of working medium to actuators of shutoff-control valves, as well as flare and loop gate valves, which are arranged on pipelines in close proximity to control cabinet, for example on one common frame with control cabinet. Opening of shutoff-control valves of each well is performed in the following way: underground cutout valve, master gate valve, loop gate valve, side gate valve; closing is performed in the reverse order.

EFFECT: improving operating reliability of shutoff-control valves.

3 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: well cluster includes at least two wells. Each well includes underground operating equipment containing cutout valve and wellhead equipment having casing head, tubing head on which there mounted is X-tree including shutoff members - master and side gate valves. Well cluster is connected to control station of actuators of shutoff members, which is made in the form of a cabinet. Control station includes power lines of function control of shutoff members' actuators. In addition, control lines of loop and flare gate valves are mounted in the cabinet. Loop and flare gate valves are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: reducing the surface area occupied with the equipment and increasing cluster operating safety.

12 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: control method of X-tree consists in opening/closing of shutoff-control valves by supplying the working medium to mechanisms of actuators of underground cutout valve, side and master gate valves by means of control station. Control station includes pneumatic hydraulic system connected through monitoring sensors of station operation parameters to control unit of the station. As control unit there used is software-and-hardware system with local control panel containing a display with sensor control to enter commands in on-line mode and local keyboard.

EFFECT: improved operating reliability of the control station and simpler design of the latter.

18 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to operation of oil production wells. Differential filter comprises swelling polymer applied on matrix particles to swell after contact with water to decrease filter permeability. Polymer is selected from polyacrylic acid or polymethacrylic acid, polymaleic anhydride, acrylamide polymer, polyamide, polyester, latex, and polyvinyl alcohol. Method of adjusting water ingress into well comprises incorporating claimed differential filter into wall bottom for operation therein. Note here that differential filter permeability decreases after contact with water.

EFFECT: controlled water ingress.

18 cl, 2 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: method includes production from a bed with a water-oil mixture in a forced mode, separation of the product into oil and water, and pumping of the released water into the bed for water intake. According to the invention, an overlying bed is opened in the well for water intake, a device is lowered into the well in the form of a lower pump and an upper pump, the inlet device of which is made as a pipe between a casing pipe and a pipe string, providing for total speed of flow during water and oil offtake that is lower than the speed of oil floating in water to separate the product in the well into oil and water. At the same time the released water is pumped with the lower pump into the bed for water intake. Pumps are selected with efficiency corresponding to watering of the bed produce, and total efficiency providing for forced offtake of the product with water and oil mixture. The device comprises pumps with drives made as capable of their serial arrangement on the pipe string in the well and having inlet and outlet devices, and a packer capable of arrangement between beds in the well, one of which is with a water-oil mixture, and the other one is intended for water intake. The inlet device of the upper pump is made as a cylindrical reservoir with an inlet side hole communicated with a bed holding a water-oil mixture, and the outlet device of this pump is made as a valve unit that lets oil through into a pipe string. The outlet device of the lower pump is made in the form of a channel with an injection valve to inject water into a bed intended for water intake, and the inlet device - in the form of a channel with a suction valve for pumping of settled water into the pump. According to the invention, the reservoir is made in the form of a pipe arranged between a casing pipe and a pipe string with the area of the inner circular section that provides for total speed of flow during water offtake with a lower pump and oil with an upper pump, which is lower than the speed of oil floating in water during intensive offtake in the reservoir. The side hole of the reservoir is arranged below the foot of the bed with water-oil mixture and the inlet of the upper pump by at least 1 m. At the same time above the upper bed designed to intake water, between the casing string and the reservoir, which is made as open at the bottom, there is an additional packet installed, and a channel of the outlet device of the lower pump is communicated with an internal packer space of the well, besides, the side hole of the reservoir is arranged above the inlet device of the lower pump at least by 1 m and below the dynamic level of the water and oil contact.

EFFECT: higher oil recovery of producing formations due to lower watering of the products, limitation of water offtake, higher gradient of pressure in borehole environment of the bed.

2 cl

FIELD: oil and gas industry.

SUBSTANCE: method involves extraction of product from formation with water-oil mixture in forced mode, separation of product into oil and water and pumping of separated water to water receiving formation. According to the invention, drilling of lower water receiving formation is performed; device in the form of lower pump and upper pump is lowered into the well; inlet system of the above device is made in the form of a pipe between casing pipe and pipe string, which provides total flow velocity at water and oil extraction, which is less than floating-up velocity of oil in water for separation of product in well into water and oil. Separated water is pumped with lower pump to water receiving formation; at that, pumps are chosen with the capacity corresponding to formation product water content and total capacity providing the forced product extraction from the formation with water-oil mixture. Device includes pumps with drives, which have the possibility of being located in series on pipe string in the well and have inlet and outlet devices, and packer having the possibility of being located between formations in the well, the upper one of which has water-oil mixture, and lower one is intended to receive water. Inlet device of upper pump is made in the form of cylindrical capacity with side inlet hole interconnected with formation containing water-oil mixture, and outlet device of this pump is made in the form of valve unit passing the oil to pipe string. Outlet device of lower pump is made in the form of channel with water delivery valve to the formation intended to receive water, and inlet device is made in the form of channel with suction valve for pumping of settled water to the pump. At that, annular section area outside the capacity is chosen so that maximum flow velocity of water-oil mixture downstream of this section exceeds floating-up velocity of oil in water. At that, capacity is made in the form of a pipe located between casing pipe and pipe string with inner annular section area providing the total flow velocity at water extraction with lower pump and oil extraction with upper pump, which is lower than floating-up velocity of oil in water at intense extraction in the capacity. Side hole of the capacity is located at least 1 m below bottom of formation containing water-oil mixture and inlet of upper pump. At that, inlet device of lower pump is interconnected with the capacity at least 1 m below side hole. Capacity is closed from below with a plug with a connection pipe interconnected with outlet device of lower pump and with borehole space.

EFFECT: increasing oil recovery owing to increasing reservoir coverage coefficient at water flooding at advanced stage of development, and reducing material costs.

3 cl, 1 dwg

FIELD: electric engineering.

SUBSTANCE: the invention relates to submersible electric motors used in pumps. The electric motor comprises a frame, numerous stator laminations inside the frame, several rotors. Each stator lamination has a central window and several slots. The rotors are positioned inside the space formed by the central windows of stator laminations. The coil wires pass through each slot of each stator laminations. The heat shrink tube wraps the coil wires and tightens them into cords. Furthermore, the space between the heat shrink tube around the coil wires and the inner space of stator laminations allows the fluid flow through stator lamination slots. The heat shrink tube is installed into the stator lamination slots to improve the heat transfer in the electric motor. Numerous wires are inserted into the slots in stator laminations. The coil wires are heated, shrinking the heat shrink tube around the coil wires and tightening them into cords, in such a way so the gap between the heat shrink tube and inner surface of the stator laminations allows the fluid flow through wire cords inside the stator laminations.

EFFECT: improved heat transfer during cooling of submersible electric motors used in pumps, improved coil wires protection from wearing.

11 cl, 3 dwg

FIELD: oil producing industry.

SUBSTANCE: invention belongs to the oil producing industry, more specifically, to killing of gas and gas-condensate wells within the framework of well-workover, primarily carried out in productive formations with abnormal low pressure and within the severe environment. Essence of the invention: the production string is filled with sealing composite in the volume equal to the total volume of the production string and the volume of the annular sub-packer space of a well. The sealing composite is pushed into a sub-packer space of a well, gradually pumping the production string with displacement and killing fluid, whereupon the well is left off for return-to-thermal-equilibrium time. After that the completion fluid is pumped into the annular space of a well, pushing out the gas, accumulated in the annular space, and into the completion string leak interval and the upper part of the annular space of a well, where it is gathered in a gas cap and blown off. Subsequently the annular space of a well is filled with a plugging composite with its driving into the completion string leak interval, whereupon the well is left off for about 12 hours. After that the production string upper than the packer and lower than the completion string leak interval is located, through holes are made. Beneath the through holes, from within the production string, a blind plug is placed. He production string is filled with killing fluid, which, while going through holes in the production string, rinses the rests of the plugging composite, displacement and completion fluid from the annular space of a well. The killing fluid supply is ceased, when its density in the annular space equals an initial density.

EFFECT: enhancement of packer well killing security within the conditions of abnormal low pressure and severe environment, more specifically, unpressurized completion string or faulty circulation valve.

1 dwg

FIELD: oil-and-gas production.

SUBSTANCE: proposed method comprises selecting initial fluid-salt solution of natural origin and/or its semi-finished product with content of dissolved salts providing for initial density in preset limits. Prepared solution is cleaned of gaseous, and/or mechanical, and/or mineral, and/or biological admixtures. Solution, thus produced, is concentrated in preset number of stages. Solution density and concentration is increased in every said stage to preselected intermediate value. Concentrated solution is forced by high-pressure pumps through integrated units of reversed osmosis. Said units are made up of concentrate and permeate tanks are separated by reversed osmosis membranes. Said reversed osmosis is used at every stage to increase salt solution concentration. Pressure of 30-190 atm is used in every concentrate tank in time interval wherein intermediate density is increased to final magnitude.

EFFECT: reduced power consumption, higher efficiency, possibility of process automation.

4 cl, 2 tbl, 2 ex

FIELD: oil and gas industry.

SUBSTANCE: opening and closing of shutoff-control valves of well cluster is performed by independent supply of working medium to actuators of shutoff-control valves and underground cutout valves in the specified sequence, as well as valves controlling the flow rate of each well. Method is implemented by means of control station mounted in the cabinet and including instrumentation and control, as well as hydraulic system. Hydraulic system includes pneumatic hydraulic pressure accumulators combined with working medium tank, pumps, pressure controls and multiplying gears, and has the possibility of controlling actuators of shutoff-control valves with time delay and in certain sequence. At that, in addition, control lines of loop and flare gate valves are mounted in cabinet of the station, which are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: invention simplifies mineral deposit production control process, as well as allows reducing the area occupied with process equipment.

21 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: single wells or wells forming clusters are drilled; production wells are equipped with wellhead equipment with X-tree including at least one side gate valve and one master gate valve, as well as underground cutout valve and throttle valve and monitoring and control members, which are installed on the loop, for example, fuse strip and gas line pressure monitoring valve. Operation of the well is performed at simultaneous control of production processes of hydrocarbons by means of the station. Control processes involve opening and closing of shutoff-control valves of well cluster by independent supply of working medium to actuators of shutoff-control valves, as well as flare and loop gate valves, which are arranged on pipelines in close proximity to control cabinet, for example on one common frame with control cabinet. Opening of shutoff-control valves of each well is performed in the following way: underground cutout valve, master gate valve, loop gate valve, side gate valve; closing is performed in the reverse order.

EFFECT: improving operating reliability of shutoff-control valves.

3 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: well cluster includes at least two wells. Each well includes underground operating equipment containing cutout valve and wellhead equipment having casing head, tubing head on which there mounted is X-tree including shutoff members - master and side gate valves. Well cluster is connected to control station of actuators of shutoff members, which is made in the form of a cabinet. Control station includes power lines of function control of shutoff members' actuators. In addition, control lines of loop and flare gate valves are mounted in the cabinet. Loop and flare gate valves are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: reducing the surface area occupied with the equipment and increasing cluster operating safety.

12 cl, 5 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production meant for control of inhibitor supply into natural gas streams, for prevention hydraling process in it. The system consists of pump with drive, pressure collector, pipeline for inhibitor withdrawal from collector, pressure stabilisation independent loops, one of which formed with pressure control instrument in pressure collector, its outlet connected with frequency transformer automatic controller, which its outlet connected with pump drive. The second stabilisation loop forms direct action pressure control block, included in group of withdrawal devices between pressure collector and production devices.

EFFECT: broadening of inhibitor streams control system functionality, supplied through independently controlled canals in every point.

1 dwg

The invention relates to equipment intended for picking wells, and more specifically to mechanisms for actuating tools in downstream wells, require the application of fluid under pressure

The invention relates to safety equipment for the production of hydrocarbons and, in particular, to a system test wells and method of pressure control elements of the system

The invention relates to the oil industry and can be used in the system of collection and treatment of oil, gas and water industries

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production meant for control of inhibitor supply into natural gas streams, for prevention hydraling process in it. The system consists of pump with drive, pressure collector, pipeline for inhibitor withdrawal from collector, pressure stabilisation independent loops, one of which formed with pressure control instrument in pressure collector, its outlet connected with frequency transformer automatic controller, which its outlet connected with pump drive. The second stabilisation loop forms direct action pressure control block, included in group of withdrawal devices between pressure collector and production devices.

EFFECT: broadening of inhibitor streams control system functionality, supplied through independently controlled canals in every point.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: well cluster includes at least two wells. Each well includes underground operating equipment containing cutout valve and wellhead equipment having casing head, tubing head on which there mounted is X-tree including shutoff members - master and side gate valves. Well cluster is connected to control station of actuators of shutoff members, which is made in the form of a cabinet. Control station includes power lines of function control of shutoff members' actuators. In addition, control lines of loop and flare gate valves are mounted in the cabinet. Loop and flare gate valves are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: reducing the surface area occupied with the equipment and increasing cluster operating safety.

12 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: single wells or wells forming clusters are drilled; production wells are equipped with wellhead equipment with X-tree including at least one side gate valve and one master gate valve, as well as underground cutout valve and throttle valve and monitoring and control members, which are installed on the loop, for example, fuse strip and gas line pressure monitoring valve. Operation of the well is performed at simultaneous control of production processes of hydrocarbons by means of the station. Control processes involve opening and closing of shutoff-control valves of well cluster by independent supply of working medium to actuators of shutoff-control valves, as well as flare and loop gate valves, which are arranged on pipelines in close proximity to control cabinet, for example on one common frame with control cabinet. Opening of shutoff-control valves of each well is performed in the following way: underground cutout valve, master gate valve, loop gate valve, side gate valve; closing is performed in the reverse order.

EFFECT: improving operating reliability of shutoff-control valves.

3 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: opening and closing of shutoff-control valves of well cluster is performed by independent supply of working medium to actuators of shutoff-control valves and underground cutout valves in the specified sequence, as well as valves controlling the flow rate of each well. Method is implemented by means of control station mounted in the cabinet and including instrumentation and control, as well as hydraulic system. Hydraulic system includes pneumatic hydraulic pressure accumulators combined with working medium tank, pumps, pressure controls and multiplying gears, and has the possibility of controlling actuators of shutoff-control valves with time delay and in certain sequence. At that, in addition, control lines of loop and flare gate valves are mounted in cabinet of the station, which are installed on pipelines in close proximity to control cabinet, for example on one common frame.

EFFECT: invention simplifies mineral deposit production control process, as well as allows reducing the area occupied with process equipment.

21 cl, 5 dwg

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