X-tree control method and device for its implementation

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

 

The invention relates to oil and gas industry and can be used in the technique of automatic control of technological processes and is intended to improve the reliability of operation of gas wells.

Known control station fountain fixture firm Cameron, operated at the Astrakhan gas-condensate field (see "Equipment wellheads and x-Mas tree". Volume 6, V/o Machinoimport, contract No. 50-0926/71338. Cameron No. 870020, No. of technical documentation R/87, Moscow, USSR).

This station contains the control Cabinet surface valves, diaphragm pneumatic separator environments, normally closed three-way two-position valve with pneumatic actuator, pressure gauge, valve couples the nozzle-valve, gearbox and throttle set as the control line side valve, and control an underground valve and flow valve. In the control Cabinet mounted pneumatic and hydraulic control actuators in the x-Mas tree (FA), a Central valve (CL), side valves (BR) and ground valve-stopping mechanism (FFP). Hydraulic cavity membrane separator in communication with the sensing element of a pressure gauge, the latter is connected with the flap valve couples the nozzle-valve using p is radtodeg mechanism.

The disadvantage of this station is the lack of reliability and the need for its maintenance by qualified personnel, due to the fact that the configuration of the transmitting mechanism from a sensing element of a pressure gauge to the flap valve couples the nozzle-valve laborious and requires attentive attitude of the staff.

Known way to control surface valves and underground valve gas wells, which consists in opening and closing the wellhead equipment of the well cluster by independent supply of the working fluid in the actuators side (KB) and stem (Sz) of the valves, underground valve-stopping mechanism (FFP) and valves governing the debit of each well using a system containing Instrumentation and automation, actuators and installed in the Cabinet station (patent RF №2181426 from 02.07.01, IPC EV 33/03, 43/12).

To implement this method, you use the control station surface valves and underground valve gas wells containing the control Cabinet in which are mounted pneumatic and hydraulic systems, pneumohydraulic diaphragm separators environments and normally closed three-way two-position pneumatic actuator and with the cavities of the input, output and drainage, established as the control line side is adviice, and control an underground valve and flow valve to line management side valve is additionally equipped with normally open three-way two-position valve with actuator, the cavity entrance which is in communication with the pneumatic system control Cabinet, the cavity output is connected to the cavity input normally closed three-way two-position valve, with the cavity of the actuator normally open and normally closed three-way two-position pneumatic spreaders are connected by a channel with a hydraulic cavity pneumohydraulic diaphragm separators environments (RF patent No. 2181426 from 02.07.01, IPC EV 33/03, 43/12).

The disadvantages of this method of management and the station are the complexity of the structures due to the necessity of using normally closed three-way two-position pneumatic, connected by a channel with a hydraulic cavity pneumohydraulic diaphragm separators environments, which leads to insufficient high reliability of the station, including the dependence of the work station from the presence of supply voltage.

Known way to control surface valves Bush wells and device for its implementation, which consists in opening and closing the wellhead equipment of the well cluster by avisimas supply the working fluid in the actuators side and stem gate valves, underground valves-off valves and valves governing the debit of each well using a system containing Instrumentation and automation, actuators and installed in the Cabinet station, characterized in that the working body for drive control actuators use the liquid, working pressure which pre-create pneumohemothorax pressure, combined with the working fluid tank, pumps, pressure regulators and multipliers in pump-and-accumulator unit and the opening of the wellhead valve to supply gas condensate wells is carried out in the following sequence: underground shutoff valve, valve stem, side valve, closing - in reverse order with a delay time determined by the inertia of the actuators actuators and safe operation of the system and device for implementing this method, containing station Cabinet in which is mounted a 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 an underground valve, when it is in the hydraulic system set pressure accumulators, connected to the working fluid tank, pumps, pressure regulators, multipliers and a piping for supplying the working fluid in the actuators side valves, stem valves, underground valve-stopping mechanism, and a valve governing the debit wells (RF patent No. 2362004, IPC EV 33/03, 43/12 - prototype).

This method is implemented as follows.

Previously in pneumohemothorax pressure, combined with the working fluid tank, pumps, pressure regulators and multipliers in pump-and-accumulator installation, create pressure fluid 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. Further, the fluid under pressure enters the actuators of the system for further use. The opening wellhead equipment for the gas condensate wells is carried out in the following sequence: underground shutoff valve, valve stem, side valve, close - in reverse order with a delay time determined by the inertia of the actuators actuators and safe operation of the system, because this sequence of actions when open and closing ensures trouble-free opening/closing hole. 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 actuators actuators, and are selected so as to ensure trouble-free closure of the wells in the specified sequence. The liquid used as the working fluid, after use in the enforcement mechanisms of the system, is fed into the tank of the hydraulic working fluid.

The main disadvantages of the above method and device for its implementation are the complexity of the design of the control station, significant size and weight, complexity and insufficient reliability of the control provided by the control unit in the station.

The objective of the invention is to eliminate the above disadvantages, increasing reliability and simplifying the design of the station.

The decision of the given problem is due to the fact that in the proposed method of control surface valves mainly gas-condensate wells, intended for the production of formation fluids, which consists in opening/closing valve in the following sequence: underground shutoff valve, valve stem, side valve, close - in reverse order by the independent the independent supply of the working fluid in the mechanisms of underground drives the valve-stopping mechanism, lateral and trunk latches by using the management station that contains the control unit, Instrumentation and automation, actuators, installed in a Cabinet station, and forming a pneumatic-hydraulic system control station that is connected via the sensor control parameters of the work station control station according to the invention as a control unit, ensure the implementation of logical operations for opening/closing the well, use the program-technical complex, mainly in the form of a controller, preferably with a local control panel that contains the monitor with touchscreen for entering commands interactively and local keyboard, at the same time as working body for the drive mechanism of the underground valve-stopping mechanism apply hydraulic fluid pressure which is created by air-driven hydraulic pump, a drive mechanism which serves pre-prepared gas management from the input line, and the flow of hydraulic fluid in the actuator underground valve-stopping mechanism from the air-driven hydraulic pump passes through valve-controlled gas control supplied to the drive mechanisms pneumatically valves, at the same time as the working fluid for control of the fur the isms actuator is pneumatically stem and side valves use the specified gas control.

In the use case method, as the working fluid to control valves and mechanisms of the actuator stem and side valves use natural gas, preferably pre-cleaned from sulphur compounds and impurities, with a dew point of water not more than minus 40°C.

In the use case method, as the working fluid to control valves and mechanisms of the actuator stem and side valves use air, preferably pre-cleaned from impurities, with the dew point for water of not more than minus 40°C.

In the use case method, as a working body for the drive mechanism of the underground valve-stopping mechanism using hydraulic fluid, mainly oil, working pressure which create air-driven hydraulic pump, mainly with manual handwheel, combined with the working fluid tank, a pressure regulator and relief valve in the oil block.

In the use case method, as a working body for the drive mechanism of the valve-stopping mechanism used oil multigrade hydraulic, mainly vmgs.

In the use case method, as a working body for the drive mechanism of the valve-stopping mechanism used oil multigrade hydraulic, advantages of the NGOs AMG-10.

In the use case method, as a working body for the drive mechanism of the valve-stopping mechanism used polymethylsiloxanes liquid type PMS-20.

In the use case method, inside the Cabinet control station support temperature that ensures smooth functioning of all system elements located in the closet.

In the use case method, the working fluid control valves closed when the well is directed into the drain line.

In the use case method, control over observance of the operating conditions on the hole and close the hole when the violation carried out through the use of primarykeyname line with destructible fusible link.

In the use case method, 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 the implementation of this method proposed control station containing station Cabinet in which is mounted the control unit of the station, pneumatic-hydraulic system for control of surface valves and underground valve wells containing Instrumentation and automation, actuators, valves with actuator and prostamide, exit and drainage, established as on-line control stem and side valves, and control an underground valve, with pneumatic-hydraulic system control station is connected via the sensor control parameters work station with a control unit of the station, which according to the invention the control unit, ensure the implementation of logical operations for opening/closing the hole made in the form of software and hardware complex, mainly in the form of a controller, preferably with a local control panel and the monitor with touchscreen for entering commands interactively and local keyboard, with a supply of working fluid in the actuator underground valve-stopping mechanism installed air-driven hydraulic pump, mainly with manual handwheel, combined with the working fluid tank, a pressure regulator and relief valve in the oil block, and the drive mechanism of the above-mentioned pump and actuator valve supplying hydraulic fluid to the drive mechanism of the valve-stopping mechanism, connected to the input supply line to the gas control, supply of the working fluid in the drive mechanisms of the lateral and trunk latches, at least, is installed on onemorelevel and the non-return valve.

In a variant of use of the device, to simplify maintenance and repair, 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 the system.

In a variant of use of the device, to reduce heat loss, the Cabinet of the station are insulated.

In a variant of use of the device, to maintain the inside of the Cabinet station desired temperature inside the Cabinet station is equipped with heating elements to provide a predetermined temperature inside the Cabinet.

In a variant of use of the device, inside the Cabinet of the station are heated area for maintenance and repair of equipment station service personnel.

In a variant of use of the device, to reduce heat loss, the internal cavity of the enclosure of the station is divided into several parts, each of which has an open panel.

In a variant of use of the device, to reduce heat losses, the 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.

In a variant of use of the device, to simplify the design of the control station, in primarykeyname Cabinet station made drainage line for transmission work is about the body when closing the well back into the tank.

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 under the real control system 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 pneumatic schematic diagram of the station, figure 2 shows a Cabinet electrical control station control station figure 3 - control station.

On a pneumo-hydraulic principial the Noah scheme station (figure 1) conventionally not shown underground shutoff valve (FFP), the side valve (BR), valve stem (Sz), and shown as a supply of the working fluid in the actuators of these devices.

For the implementation of this method proposed control station fountain fixture.

In a pneumatic system of the station are the pipeline containing the ball valve 1 and valve 2 for gas supply to the actuators of the elements pneumohydraulic system. To control the pressure of gas supply has a pressure sensor 3. For ease of maintenance the sensor is mounted on the manifold with drain hole.

The valve 4, valve 5 with an electromagnetic actuator, a pressure regulator 6, custom pressure control pump 7, is installed in the gas supply lines to drive the pump 7. In the discharge line of the pump has a relief valve that is configured to the maximum pressure (not labeled). To open the valve 5 serves voltage at the valve coil. The valve 5 has a manual actuator that is used during maintenance or adjustment of the station.

The valve 8 is used to supply gas to the inputs of the valves with solenoid control 9, 10, 11, intended to control, respectively drives the distributor 12 FFP, Sz, BZ. Drives Sz and BZ conventionally not shown. To open the valves 9, 10, 11, serves the voltage on them is tuski.

The valve 9 is installed in the gas supply lines to the actuator of the dispenser 12 that is installed in the supply line hydraulic fluid FFP (not shown). When opening the valve 12 of the hydraulic fluid, preferably oil, under pressure through the needle valve is supplied to the actuator FFP. To control the pressure of the hydraulic fluid in line FFP installed sensor 13.

In the Cabinet of the control station is an oil block 14 to the tank of the working fluid to create a pressure of the hydraulic fluid in the control line FFP. When the supply pressure of the control gas pump 7 is activated, increasing the pressure of the hydraulic fluid to the desired value.

Cavity of the distributor 12 is connected to the cavities of pipeline gas supply management and supply line hydraulic fluid from the pump cavity 7, associated with the cavity of the tank working body oil unit 14.

In the discharge line of the pump 7 is installed a pressure gauge 15 for visual inspection of the pressure.

In-line valve 10, providing gas supply control on the drive NW, a pressure sensor 16.

In line valve 11, which feeds gas control actuator BZ, a pressure sensor 17.

The algorithm is open all valves in the automatic mode using the control Cabinet 18 of the station.

The control Cabinet 1 station includes a control unit 19, made in the form of program-technical complex, with a monitor 20 for entering commands in interactive mode and the keyboard 21.

In the control Cabinet station 18 also mounted all pneumohydraulic system station for control of surface valves. Pneumohydraulic system of the control station are connected via the sensor control parameters 13, 16, 17 station control station 19.

The proposed station is as follows.

The feed gas is supplied into the pneumatic line from the outer stationary source through the ball valve 1 and valve 2. The pressure of the gas supply is controlled using the pressure sensor 3.

Through the valve 4, valve 5 with an electromagnetic actuator, a pressure regulator 6, custom pressure control pump 7, the gas is supplied to the pump 7. The relief valve is configured to the maximum pressure in the discharge line of the pump. To open the valve 5 is energized by the valve coil. The valve 5 has a manual actuator that is used during maintenance or adjustment of the station.

Through the valve 8, the gas is fed to the inputs of the valves with solenoid control 9, 10, 11, designed to control, respectively, the actuators 12 FFP, Sz, BZ. Drives Sz and BZ conventionally not shown. To open the valves 9,10, 11 voltage is applied to their cat the key.

After opening the valve 9, the gas is supplied to the actuator of the dispenser 12. When opening the valve 12, the hydraulic fluid under pressure through the needle valve is supplied to the actuator FFP. Monitoring the pressure of the hydraulic fluid in line FFP is carried out by the pressure sensor 13.

The pressure of the hydraulic fluid, mainly oil, in-line control FFP is created using oil unit 14, located in the Cabinet of the control station. When the supply pressure of the control gas pump 7 is activated, increasing the oil pressure to the desired value. The oil under pressure is fed to the input of the distributor 12. Simultaneously to the actuator of the dispenser 12 is supplied with control pressure of the gas. The valve 12 is opened, and the oil under pressure enters the hydraulic FFP. Visual control of the oil pressure in the discharge line of the pump 7 in the station is on a pressure gauge 15.

After opening the valve 10, the gas under pressure through the valve quick exhaust is supplied to the drive NW. The control pressure of the control gas in the line Sz is carried out by means of the sensor 16.

After opening the valve 11, the gas under pressure through the valve quick exhaust is supplied to the actuator BRS. The control pressure of the control gas in the line BR is carried out by means of the sensor 17.

The algorithm works all klebanow automatic mode, consisting in opening/closing valve in the following sequence: underground shutoff valve, valve stem, side valve, close - in reverse order by the independent supply of the working fluid in the mechanisms of underground drives the valve-stopping mechanism, lateral and trunk latches, using the control Cabinet 18 stations. Commands are entered into the control unit 19, made in the form of software and hardware complex, in the interactive mode using the monitor 20 or the keyboard 21.

Pneumohydraulic system of the control station are connected via the sensor control parameters 13, 16, 17 station control station 19.

In addition, when the control unit 19 provides the following functions:

- control equipment x-Mas tree BZ,Sz, FFP, valves;

- forming and displaying information to the operator about the condition of the equipment FA and station;

- functional testing of pressure sensors, temperature sensors and solenoid valves;

control the oil level in the hydraulic tank;

- formation of information for presentation on the operator panel;

- receive control signals from the operator panel;

- exchange of information with APCS.

The proposed method is implemented as follows : the m

Gas food served in the pneumatic line from the outer stationary source through the ball valve 1 and valve 2. The pressure of the gas supply control pressure sensor 3. For ease of maintenance the sensor is mounted on the manifold with drain hole.

Through the valve 4, valve 5 with an electromagnetic actuator, a pressure regulator 6, custom pressure control pump 7, the gas serves to drive the pump 7. The relief valve is configured to the maximum pressure in the discharge line of the pump. To open the valve 5 serves voltage at the valve coil. The valve 5 has a manual actuator that is used during maintenance or adjustment of the station.

Through the valve 8, the gas is fed to the inputs of the valves with solenoid control 9, 10, 11, intended to control, respectively drives the distributor 12 FFP, Sz, BZ. Drives Sz and BZ conventionally not shown. To open the valves 9, 10, 11 serves voltage on their coils.

After opening the valve 9, the gas is fed to the actuator of the dispenser 12. When opening the valve 12, the hydraulic fluid under pressure through the needle valve is supplied to the actuator FFP. Monitoring the pressure of the hydraulic fluid in line FFP carried out by the sensor 13.

The pressure of the hydraulic fluid in the control line FFP created by mass is on block 14, located in the Cabinet of the control station. When the supply pressure of the control gas pump 7 is activated, increasing the oil pressure to the desired value. The oil is fed under pressure at the valve inlet 12. Simultaneously to the actuator valve 12 serves the control gas pressure. The valve 12 is opened, and the oil under pressure enters the hydraulic FFP. Visual control of the oil pressure in the discharge line of the pump 7 in the stations operate on a pressure gauge 15.

After opening the valve 10, the gas under pressure through the valve quick exhaust serves to drive NW. The control pressure in the line Sz carried out by means of the pressure sensor 16.

After opening the valve 11, the gas under pressure through the valve quick exhaust serves to drive the BRS. The control pressure in the line BZ carried out by means of the pressure sensor 17.

The algorithm of operation of all valves in the automatic mode, in which the opening/closing valve in the following sequence: underground shutoff valve, valve stem, side valve, close - in reverse order by the independent supply of the working fluid in the mechanisms of underground drives the valve-stopping mechanism, lateral and trunk latches, perform using the control Cabinet 18 stations. The control Cabinet 18 station includes a control unit 19, made the first in the form of software and hardware complex, with the monitor 20 to enter commands in interactive mode and the keyboard 21.

In addition, when the control unit 19 provides the following functions:

- control equipment x-Mas tree BZ,Sz, FFP, valves;

- forming and displaying information to the operator about the condition of the equipment FA and station;

- functional testing of pressure sensors, temperature sensors and solenoid valves;

control the oil level in the hydraulic tank;

- formation of information for presentation on the operator panel;

- receive control signals from the operator panel;

- exchange of information with APCS.

The use of the proposed technical solutions will improve the reliability of the control station and to simplify its construction.

1. The method of controlling surface valves mainly gas-condensate wells, intended for the production of formation fluids, which consists in opening/closing valve in the following sequence: underground shutoff valve, valve stem, side valve, close - in reverse order by the independent supply of the working fluid in the mechanisms of underground drives the valve-stopping mechanism, lateral and trunk latches by using the management station that contains the control unit, the control and measuring instruments, the IV is tion mechanisms, installed in the Cabinet station, and forming a pneumatic-hydraulic system control station that is connected via the sensor control parameters of the work station with the control unit in the station, characterized in that the control unit, ensure the implementation of logical operations for opening/closing the well, use the program-technical complex, mainly in the form of a controller, preferably with a local control panel that contains the monitor with touchscreen for entering commands interactively and local keyboard, at the same time as the working fluid for the drive mechanism of the underground valve-stopping mechanism apply hydraulic fluid pressure which is created by air-driven hydraulic pump drive mechanism which serves pre-prepared gas management from the input line, and the flow of hydraulic fluid in the actuator underground valve-stopping mechanism from the air-driven hydraulic pump passes through valve-controlled gas control supplied to the drive mechanisms pneumatically valves, at the same time as the working fluid for controlling mechanism of the actuator is pneumatically stem and side valves use the specified gas control.

2. The method according to claim 1, featuring the the action scene, as the working fluid to control valves and mechanisms of the actuator stem and side valves use natural gas, preferably pre-cleaned from sulphur compounds and impurities, with a dew point of water not more than minus 40°C.

3. The method according to claim 1, characterized in that as a working fluid to control valves and mechanisms of the actuator stem and side valves use air, preferably pre-cleaned from impurities, with the dew point for water of not more than minus 40°C.

4. The method according to claim 1, characterized in that as the working fluid for the drive mechanism of the underground valve-stopping mechanism using hydraulic fluid pressure which create air-driven hydraulic pump, mainly with manual handwheel, combined with the working fluid tank, a pressure regulator and relief valve in the oil block.

5. The method according to claim 1, characterized in that as the working fluid for the drive mechanism of the valve-stopping mechanism used oil multigrade hydraulic, mainly vmgs.

6. The method according to claim 1, characterized in that as the working fluid for the drive mechanism of the valve-stopping mechanism used oil multigrade hydraulic, mainly AMG-10.

7. The method according to claim 1, characterized in that the as the working fluid for the drive mechanism of the valve-stopping mechanism used polymethylsiloxanes liquid type PMS-20.

8. The control method according to claim 1, characterized in that inside the Cabinet stations support a temperature that ensures smooth functioning of all system elements located in the closet.

9. The control method according to claim 1, characterized in that the working body control valves closed when the well is directed into the drain line.

10. The control method according to claim 1, characterized in that the control over observance of the operating conditions on the hole and close the hole when the violation carried out through the use of primarykeyname line with destructible fusible link.

11. The control method according to claim 1, characterized in that the 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.

12. The device for implementing the method according to claim 1, containing station Cabinet in which is mounted the control unit of the station, pneumatic-hydraulic system for control of 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 an underground valve about what scutellum, when this pneumatic-hydraulic system control station is connected via the sensor control parameters work station with a control unit of the station, characterized in that the control unit, ensure the implementation of logical operations for opening/closing the hole made in the form of software and hardware complex, mainly in the form of a controller, preferably with a local control panel and the monitor with touchscreen for entering commands interactively and local keyboard, with a supply of working fluid to the actuator underground valve-stopping mechanism installed air-driven hydraulic pump, mainly with manual handwheel, combined with the working fluid tank, regulator pressure and relief valve in the oil block, and the drive mechanism of the above-mentioned pump and actuator valve supplying hydraulic fluid to the drive mechanism of the valve-stopping mechanism, connected to the input supply line to the gas control, supply of the working fluid in the drive mechanisms of the lateral and trunk latches at least set one dispenser and the non-return valve.

13. The device according to item 12, wherein the hydraulic system is divided into several parts, each of which cm is mounted in a separate module, and has connectors for otstykovki with the rest of the system.

14. The device according to item 12, characterized in that the enclosure of the station are insulated.

15. The device according to item 12, characterized in that the inside of the closet station is equipped with heating elements to provide a predetermined temperature inside the Cabinet.

16. The device according to item 12, characterized in that inside the Cabinet of the station are heated area for maintenance and repair of equipment station service personnel.

17. The device according to item 12, characterized in that the internal cavity of the enclosure of the station is divided into several parts, each of which has an open panel.

18. The device according to item 12, 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.

19. The device according to item 12, characterized in that primarykeyname Cabinet station made drainage line for transmission of a working body when closing the well back into the tank.



 

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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 production.

SUBSTANCE: proposed device comprises parker. Said parker comprises casing with lock, top coupling, elastic gland and adjusting assembly made up of hollow casing locked in coupling, seat, radial channels, shut-off element and compression spring. Locking element is made up of slips moving apart in fitting in place. Hollow casing inner space is provided with changeable jet. Hollow casing is provided with annular contraction with top and bottom chamfers arranged above radial channels. Top chamber angle is smaller than that of bottom chamber. Seat is fitted into hollow chamber to move up and down therein as-sealed. Shut-off element is provided with shaft with grooved surface to receive spring ring to interact with said annular contraction. Note here that spring stiffness, angles of chamfers and rigidity of spring ring are selected to allow spring contraction by pressure differential and spring ring displacement below said hollow casing annular contraction. Thereafter, shut-off element moves up while spring ring displaces into its initial position, that is, above hollow casing annular contraction.

EFFECT: simplified design, decreased consumption of metal.

1 dwg

FIELD: gas and oil production.

SUBSTANCE: method involves perforation interval locking by locking composition and a portion of choking fluid feed. Additional portion of choking fluid is injected through pump compressor pipe string to wellhead before feeding locking composition. Perforation interval zone overlapping is implemented at wellhead height of minimum 110% of perforation interval length. Volume of choking fluid portions are calculated so as the height of choking fluid portion column against surface of locking composition in pump compressor pipe string is equal to the height of additional choking fluid portion column against surface of locking composition in annular space. When pressures in pump compressor pipe string and in annular space are equal, gas is extracted from annular space together with gas extracted by displacement in pump compressor pipe string.

EFFECT: extended functional possibilities of the method, reliable locking insulation screen in perforation interval zone in a well with abnormally low bed pressure.

2 dwg

FIELD: gas and oil production.

SUBSTANCE: pressure of extracted fluid in pump zone is monitored, pump performance is controlled by control station located on the surface. Pressure gauge is placed into extracted fluid collection chamber located between suction valve and plunger. Reciprocal plunger movement rate is regulated from the station by the gauge readings so that pressure in collection chamber does not fall below specified value.

EFFECT: increased performance of bottomhole plunger pump due to more compact filling of the chamber between plunger and suction valve at each plunger stroke.

1 dwg

FIELD: gas and oil production.

SUBSTANCE: device consists of perforated casing and of chamber-divider with channels for supply of mixture of water and oil and for water removal. Also, the chamber-divider is made in form of a case containing upper and lower chambers divided with a bridge equipped with an axial channel and a shank end wherein there is installed a back spring valve. At least two spring loaded back valves are installed in the said bridge. The lower chamber of the case is equipped with pressure tight secured bush forming a cavity between a low end of the said bridge and an upper end of the said bush. The said cavity is communicated with a lower section of circular space by means of channels made in a lower section of the case. Circular space is formed with internal surface of the casing and external surface of the case. Upper and lower sections of the case have circular cylinder lugs. Also, the upper part of the case is pressure tight connected with a hollow cover in axial channel of which there is installed the back unidirectional spring loaded valve. Back unidirectional spring loaded valves are installed in a side wall of the upper section of the upper chamber of the case. A hollow tube is set inside the upper chamber resting on the bridge of the case and a lower end of its cover. The hollow tube has a row of through orifices. A float equipped with lock valves on ends is positioned inside the tube.

EFFECT: raised efficiency of operation due to self-regulation of water evacuation into water bearing reservoir and discharge of hydrocarbons - into production string.

1 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: foam-forming compound for shutting wells contains hydrocarbon liquid, mixture of surfactants, one of components thereof is water solution of lignosulphonate reagent of 25% concentration, herbal filling agent and 20% water solution of calcium chloride, as lignosulphonate agent reagent it contains powder-like technical lignosulphonate, and as other component of surfactant mixture - hexamethylentetramine, and as herbal filling agent - peat or grass flour with following ratio of components in percents of mass: hydrocarbon liquid 12-14, said water solution of technical powder-like lignosulphonate 17-21, hexamethylentetramine 0.17-0.63, peat or grass flour 3-6, said calcium chloride solution - the rest, while relation of mass portions between said water solution of technical powder-like lignosulphonate and hexamethylentetramine is 1: 0.01-0.03 respectively, as grass flour it contains pulverized herbal waste of grain bread production or similar substance.

EFFECT: higher efficiency.

2 cl, 18 ex, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: compound includes water and inhibiting salt, as inhibiting salt contains processed electrolyte - side product during production of magnesium via electrolysis from carnallite, and additionally as reducer of filtering and thickener - carbooximethylcellulose polymer, and as colmatation agent - magnesium oxide with following relation of components in percents of mass: processed electrolyte - side product of magnesium production via electrolysis from carnallite 10.0-15.0, carbooximethylcellulose 2.5-3.0; magnesium oxide 1.0-2.0, water 80.0-86.5.

EFFECT: higher efficiency.

3 tbl

FIELD: oil and gas producing industry, in particular composition for killing of well.

SUBSTANCE: claimed polysaccharide gel contains sweet or mineralized water, polysaccharide gelling agent, boron cross-linking agent, diethanolamine, quaternary ammonium compounds, and mixture of non-ionic and anionic surfactant (complex surfactant). Mixture of water soluble oxyethilated alkylphenols and their sulphoethoxylates in form of sodium salts or salts with triethanolamine is used as complex surfactant in amount of 0.1-0.5 kg on 1000 l of water being the gel base. Polysaccharide gel is obtained by dissolution and hydration of polysaccharide gelling agent in sweet or mineralized water (preferably monovalent ion solution) followed by treatment of obtained polysaccharide solution with aqueous solution including boron cross-linking agent, diethanolamine, quaternary ammonium compounds, and complex surfactant.

EFFECT: well killing composition of improved quality.

2 cl, 6 ex, 1 tbl

FIELD: oil extractive industry.

SUBSTANCE: method includes mounting compressor pump in such a way, that input aperture of tail piece was positioned below bed sole. Prior to that water cone in face-adjacent zone is destroyed by draining water through tail piece, connected to lower suck-in valve of compressor pump cylinder, and along behind-pipe space through side suck-in valve of compressor pump cylinder. In case of increase of hydrocarbon contained in drained liquid beginning of water cone destruction is assumed. Draining is continued until destruction of emulsion in water cone, formed in non-homogenous porous environment of bed at limits of hydrocarbon-water and water-hydrocarbon, separation of water and hydrocarbon streams and bringing current water-hydrocarbon contact to initial position. Then during extraction water is drained through tail piece, and hydrocarbon - along behind-pipe space.

EFFECT: higher yield.

3 cl, 1 dwg

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