RU2512228C1 - Plant for dual operation of multiple-zone well with telemetry system - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: plant contains in the casing pipe a pipe string, electric pump, power cable and device for dual strata operation made in a housing consisting of adjustment units and production rate measurement unit that contain controlling valves and instruments and meters. The housing consists of pipes equipped with packers and connected by sleeves for cross-flow fluids. Controlling valves are made in a cage with installed electrically-actuated needle valve interacting with crossover seat. In cage walls there are windows made at both sides of crossover seat. Instruments and meters are located higher and/or lower than controlling valves; they are interconnected by a logging cable laid in the channel made in the cage wall. Adjustment units and production rate measurement units are connected to the power cable by logging cable, TMC adapter installed at the end-face of electric pump and cable socket, which pin is fixed at a mounting flange with openings installed at the end-face of the housing and a contact pair socket placed in the centring skid fixed at the end-face of electric pump.

EFFECT: increasing efficiency of dual operation of the well at optimum regulation of phase composition and metering of fluids from strata on real-time basis.

9 cl, 2 dwg

Description

The invention relates to mining, in particular to oil production, and can be used for simultaneous and separate operation of multilayer wells.

A well-known installation for simultaneous and separate operation of a multilayer well, including a pipe string, a pump with a liner, a hydraulic channel or an electric cable, at least one hydraulic or mechanical or electrical packer located on the liner and / or outside the liner, is provided at least one regulating shut-off-by-pass device of reusable hydraulic or electrical action located on the shank and / or outside the shank and connected to the hydraulic cable scarlet and / or an electric cable. The pump is a deep electric pump or sucker rod pump, and at least one packer is connected to the hydraulic channel and / or with an electric cable and is installed above and / or below the pump with a shank, an electric immersion cable supplying the submersible electric drive of the deep pump, going through the packer. Regulating locking and bypass device contains a bellows, a piston, a valve, a fitting. A packer or a borehole chamber with a check valve or fitting is also used as a control shut-off device. The shank is made of a monolithic, hollow, hollow with a blind end. The installation additionally includes instrumentation located on the shank or outside the shank, an ejector located above the pump, a disperser and / or separator located on the pump intake, a suction grid or filter installed at the pump inlet with a disconnecting device and / or a shear coupling elements, a centralizer located on the disconnector rod or on the pipe string. (Patent RU No. 95741 U1 for utility model “Garipov's pumping unit for simultaneous and separate well operation (options)”. - IPC: Е21В 43/00. - 07/10/2010). A disadvantage of the known installation is the lack of the possibility in real time to change the operating mode of each formation in the well and to monitor the actual changes in the technological parameters of the fluid of the well product.

A well-known installation for simultaneous and separate operation of a multilayer well, comprising several tubular elements located one in the other with the formation of at least one central channel and at least two annular channels with the possibility of directing flows from different layers into their corresponding concentric channels, as well as valves configured to control flow in each of the channels. The valves are located in the casing of the wellbore with the possibility of separate movement of flows through concentric channels and further selective mixing of flows from all channels in the tubing string. Each channel is associated with an actuated valve. A plug is installed in the central channel directly above the valve, blocking the movement of flow directly from the central channel to the string of tubing of the well. The system may further comprise at least one controller with a sensor for measuring at least one parameter of the produced product, functionally interconnected, with the ability to automatically control at least one valve in accordance with information received from the sensor. The measured parameter can be selected from the group including pressure, temperature, chemical composition, water content, pH, solids content, tendency to form a solid precipitate, and resistivity. The system provides effective selective control of the flow rate from a large number of formations prior to mixing inside the well by means of valves installed inside the well, without significantly complicating and increasing the surface and underground layouts (Patent RU No. 2320850 C2. Intelligent downhole valve control system for extracting fluids from several intervals of the well and method management of such fluid extraction. - IPC Е21В 34/06, ЕВВ 43/14. - Publ. March 27, 2008). A disadvantage of the known technical solution is the possibility of depression of the formation with lower pressure in real time and to track the actual flow rate of the well product.

A device is known for simultaneous and separate operation of a multilayer well, comprising a body with holes made opposite each productive formation, valve sleeves with spring ring retainers and gripping elements installed in the body opposite each of its holes with axial movement, a control mechanism for lowering into the well with surface and movement of valve sleeves to open or close housing openings and packers. Outside the casing, opposite each of its openings, adjustable valves are installed. Each adjustable valve consists of a hollow cup, inside of which a sleeve with a seat is placed, and a ball spring-loaded from top to bottom, placed on the seat of the sleeve. At the same time, adjustable valves make it possible to operate the corresponding productive formations when the specified pressure values are exceeded by adjusting the compression force of the ball spring for each adjustable valve separately, while the gripping elements of the valve sleeves are made in the form of their lower ends, and the inner diameter of each of the valve sleeves decreases from above way down. (Patent RU No. 2339796 C1 for the invention. Device for simultaneous and separate operation of a multilayer well. - IPC: Е21В 43/14, ЕВВ 34/06. - Publ. 27.11.2008). This invention is taken as a prototype.

A disadvantage of the known device for simultaneous and separate operation of a multilayer well, adopted as a prototype, are adjustable valves with a ball spring-loaded from top to bottom placed on the saddle of the sleeve, allowing to operate the corresponding productive formations when exceeding the specified pressure values by adjusting the compression force of the ball spring for each adjustable valve separately, which eliminates the possibility in real time to change the operating mode of each formation in the well and ezhivat actual changes in fluid flow rate downhole parameters and product.

The main task to be solved by the claimed invention is aimed at providing the possibility in real time to change the operating mode of each formation in the well and to monitor the actual changes in the fluid parameters and the flow rate of the well product, including pressure, temperature, chemical composition, water content, pH, solid content particles, a tendency to form gravel and sand packing and resistivity.

The technical result is to increase the efficiency of simultaneous and separate operation of the well with optimal control of the phase composition of the fluid from the wellbore in real time.

The specified technical result is achieved by the fact that in the well-known installation for simultaneous and separate operation of a multilayer well with a telemechanical system containing a tubing string, a deep electric drive pump, a power cable supplying the submersible electric drive of the pump, and control valves made in glasses with a bypass saddle, located below the pump in a housing equipped with packers and fixed in the casing with mechanical anchors, and a control o-measuring instruments, according to the proposed technical solution,

it contains a device for simultaneous and separate operation of the reservoirs, made in a housing consisting of a string of pipes equipped with packers and connected to each other and to the lower end of the housing by couplings for the cross-flow of fluids from the formation through the annular spaces, the hollow pipes of the housing communicated with longitudinal channels of the latter with the possibility of selective mixing fluids from all productive formations in the casing cavity above the device for simultaneous and separate reservoir exploitation, and the longitudinal channels of the lower the couplings are blocked by a plug, and the radial channels of the couplings are in communication with the annular space of the corresponding wellbore, while the couplings are equipped with blocks for controlling and accounting for flow rates of the strata containing the control valve and control and measuring devices, the latter are located above and / or below the control valve, interconnected a geophysical cable located in a channel made in the wall of the glass, while the control units and metering flow rate are interconnected by geophysical cables and connected to the point well control by a telemechanical transmission system of control commands to control valves from the control point and control information on the technological parameters of the fluid in the well strata from control and measuring devices in the opposite direction with the separation of signals, using geophysical and power cables through a cable connector and an adapter mounted on the end of the pump electric drive ;

the upper end of the body is connected to the packer and secured with a mechanical anchor at the level of its end;

the cable connector pin is mounted on a support flange mounted on the upper end of the housing, in which holes are made, communicating the cavity of the housing and the casing, and the geophysical cable is equipped with a contact pair outlet installed in the centralizer of its position relative to the contact pair pin mounted on the pump electric drive, with the possibility of hermetically connecting them by pressing the socket on the pin with an electric drive of the pump, lowered into the casing on the tubing string;

blocks of regulation and accounting of the flow rate of the seams are made with the possibility of alternating landing them from the wellhead into the nests of the respective couplings and dismantling during repair and maintenance, for which the diameters of the seats of the blocks and couplings, respectively, are reduced from top to bottom;

geophysical cables in the sections between the support flange and the formation flow control and metering units are placed in telescopic tubes equipped with compression springs, with the possibility of changing the distance between the control and production flow metering units when dismantling and alternately planting them in the respective fluid cross-flow couplings;

an electric drive locking needle is installed in the glass cavity from the open end side, which interacts with the overflow seat, the step electric drive of which, upon command from the control point, informs the locking needle of the reciprocating movement with the possibility of regulating fluid flow from the corresponding formation through the radial channels of the coupling and the glass cavity into the housing cavity through windows made in the wall of the glass on both sides of the bypass saddle;

fluid cross-flow couplings are made with a nozzle in which control and measuring instruments are placed, at least a fluid flow meter of the corresponding well formation;

in cross fluid flow couplings, annular valves are installed with the possibility of axial movement to open and close the radial channels of the fluid flow from the corresponding well formation during planting and their engagement during dismantling;

the telemechanical control system of the control units and the formation flow metering is equipped with an interface for transmitting control commands to the control valves from the well control point and information from the control and measuring devices in the opposite direction through the GPRS communication system.

The analysis of the prior art cited by the applicant made it possible to establish that there are no analogues that are characterized by sets of features identical to all the features of the claimed installation for simultaneous-separate operation of a multilayer well with a telemechanical system. Therefore, the claimed technical solution meets the condition of patentability "novelty."

The search results for known solutions in the art in order to identify features that match the distinctive features of the prototype of the features of the claimed technical solution have shown that they do not follow explicitly from the prior art. From the prior art determined by the applicant, the influence of the transformations provided for by the essential features of the claimed technical solution on the achievement of the specified technical result is not revealed. Therefore, the claimed technical solution meets the condition of patentability "inventive step".

The claimed technical solution can be implemented at any engineering enterprise from well-known materials and accepted technology. Therefore, the claimed technical solution meets the condition of patentability "industrial applicability".

Figure 1 schematically shows the installation of simultaneous and separate operation of a multilayer well with a telemechanical system, figure 2 is a control unit and accounting flow rate of the wellbore.

The installation for simultaneous and separate operation of a multilayer well with a telemechanical system (TMS) contains a tubing string 2 in the casing 1 of the well 2 with a deep electric drive pump 3, a power cable 4 supplying the submersible electric drive 5 of the deep pump 3, and the device is simultaneously -separate formation operation, performed in a housing consisting of a string of pipes 6 ′, 6 ″ and 6 ″ equipped with packers 7 ′, 7 ″ and 7 ″, respectively, connected to each other and to the lower end of the housing by couplings 8 ′, 8 "and 8" restnogo flow of fluids from reservoirs I, II and III of the well (1). The upper end of the casing is connected to the packer 7 'and fixed in the casing 1 by a mechanical anchor 9' at the end face, forming a cavity 10 in the casing 1 above the device for simultaneous-separate operation of the layers, and the lower end of the casing is fixed by a 9 "mechanical anchor. In couplings 8 ', 8 "and 8"', the control and accounting units 11 ', 11 "and 11"' are installed for reservoirs I, II and III of the well, respectively, and are interconnected by geophysical cables 12 'and 12 "and with a power cable 4 via geophysical cable 12 ", cable connector 13 and adapter 14, installed inserted at the end of the electric drive 5 of the pump 3. The pin 15 of the cable connector 13 is mounted on a support flange 16 mounted on the upper end of the housing, in which holes 17 are made, communicating the cavity of the housing and the cavity 10 of the casing 1. The socket 18 of the contact pair of the cable connector 13 is connected to geophysical cable 12 '"and installed in a centralizer (not shown conditionally) its position relative to the pin 15 of the contact pair, mounted on the electric drive 5 of the pump 3, with the possibility of hermetic connection by pressing socket 18 on the pin 15 of the electric drive house 5 of the pump 3, lowered into the casing 1 on the tubing 2. The longitudinal channels 19 in the couplings 8 'and 8 "are the cavities of the pipes 6', 6" and 6 "of the housing with the possibility of selective mixing of fluids from the reservoirs I, II and III wells in the cavity 10 of the casing 1 (Figure 2). The longitudinal channels 19 of the lower sleeve 8 ″ are blocked by a plug 20. The radial channels 21 of the couplers 8 ′ and 8 ″ are in communication with the annulus of the corresponding formation. Geophysical cables 12 ', 12 "and 12" in the areas between the support flange 16 and the blocks 11', 11 "and 11" are made, for example, in a spiral shape and placed in telescopic tubes 22 equipped with compression springs 23, with the possibility of changing the distance between blocks 11 ', 11 "and 11" during dismantling and alternately landing them in the nests of the corresponding couplings 8', 8 "and 8" ", the diameters d ', d" and d' "of their seats are reduced from top to bottom in the order d '> d "> d '". Blocks 11 ', 11 "and 11"' contain control valves (PK) 24 and control equipment (KIP) 25, designed to measure the technological parameters of the formation fluid, such as pressure P, flow rate Q, temperature T, water content R and others that can be controlled by the operator of the control point (CU) of the well (not shown conventionally) located on the surface of the well, with the possibility of transmitting control commands of RK 24 from the control unit and control information about the fluid parameters in the productive strata of the well from the instrumentation unit 25 in the opposite direction along the geofi 12 '' cable through a TMS adapter 14 and a power cable 4 with signal separation. Couplings 8 ', 8 "and 8'" are made with a pipe 26 in which instrumentation 25, at least, a flow meter 27 of the fluid of the corresponding formation are placed. 24 are made in cups 28 with a bypass saddle 29. A locking needle 30 is installed in the cavity of the cup 28 on the side of its open end, interacting with the bypass saddle 29, the electric drive 31 of which, upon command from the control unit, informs the shutting needle 30 of the reciprocating movement with the possibility of regulating fluid flow from respectively the formation through the radial channels 21 of the coupling and the cavity of the cup 28 into the cavity of the housing through the windows 32 and 33 made in the wall of the cup 28 on both sides of the bypass seat 29. Instrument 25 is located above the stepper electric drive 31 of the locking needle 30 and / or below the bypass saddle 29, interconnected by a geophysical cable 34, the latter is placed in a channel made in the wall of the cup 28. In the couplings 8 ', 8 "and 8", ring valves 35 are mounted with the possibility of axial movement to open the radial channels 21 with an emphasis on the collar 36, made on couplings, and zats heating them with circlips 37 on blocks 11 ', 11 "and 11"' when landing in couplings 8 ', 8 "and 8" "for the subsequent closure of radial channels 21 when dismantling blocks 11', 11" and 11 "" and fixing them expandable rings 38 in the groove 39, fixing the closed position. The TMS of the well is equipped with interfaces for transmitting control commands of RK 24 from the PU well and information from the control instrument 25 in the opposite direction through the GPRS or 3G communication system.

Installation of the proposed installation for simultaneous and separate operation of a multilayer well with TMS is performed as follows. At the wellhead, pipes 6 ′, 6 ″ and 6 ″ of the case of the device for simultaneous-separate formation operation, equipped with packers 7 ′, 7 ″ and 7 ″ ″ with mechanical anchors 9 * and 9 ″, are alternately connected to each other by couplings 8 ′, 8 "and 8 '" cross fluid flow in which the radial channels 21 are closed by annular valves 35. The housing assembly is lowered into the casing 1 using tubing string 2 and secured with mechanical anchors 9' and 9 ". Then, the blocks 11 ', 11 "and 11"' of regulation and accounting of the flow rate of the strata I, II and III of the well with closed bypass saddles 29 are connected to each other and to the supporting flange 16 by geophysical cables 12 ', 12 "and 12" ', placed in telescopic tubes 22 and stretched in length under the influence of springs 23, with a fixed pin 15 of the contact pair of the cable connector 13 on the opposite side of the support flange 16, in which the holes 17 are made. Flange 16 is attached to the blocks 11', 11 "and 11" 'to the tubing string 2 and using the last blocks 11', 11 "and 11" in a bundle of therefore, they are lowered into the device body and, by the force of the downhole closer from the well surface, are alternately hermetically seated in the jacks of the couplings 8 ', 8 "and 8'" as the diameters of the seats increase with a decrease in the length of the geophysical cables 12 ', 12 "and 12" in telescopic tubes 22 by compressing the springs 23, i.e. first into a sleeve 8 ″ with the smallest diameter d ′ ″, then into a sleeve 8 ″ with the diameter d ’, then into a sleeve 8 ′ with the largest diameter d’. Together with the seating of the blocks 11 ', 11 "and 11" in the socket of the couplings 8', 8 "and 8" the ring gate valves 35 are engaged in the blocks 11 ', 11 "and 11" by the locking rings 37 and together are displaced along the central axis to the stop of the annular valve 35 into the collar 36, squeezing expanding rings 38 from the fixing grooves 39, thereby opening the previously closed radial channels 21 for fluid flow from the corresponding wellbore. Blocks 11 ′, 11 ″ and 11 ″ are fixed in each coupling 8 ′, 8 ″ and 8 ″ under the compression force of the springs 23 by pressing the support flange 16 and securing it to the end face of the device’s simultaneous-separate formation operation. In this case, the fluid flows from the strata I, II, and III of the well enter through open radial channels 21 in the cavity of the couplings 8 ', 8 ", and 8" "as the blocks 11', 11", and 11 "" fit into the corresponding couplings of the couplings. After that, the tubing string 2 is disconnected from the device for simultaneous-separate operation of the strata and removed from the casing 1. The next step is the tubing string 2 with a deep electric drive pump 3, a power cable 4 supplying the submersible electric drive 5 of the deep pump 3 to the casing 1 of the well. the end of which has an adapter 14 TMS, a geophysical cable 12 "with a socket 18 and the centralizer of this socket. Pressing socket 18 on pin 15 of the tubing string 2 makes a tight connection of pin 15 to socket 18 of the cable pair of the connector 13 and connecting the UE via TMS, requiring no additional connection cables gasket to obtain control information from the control devices transmitting control signals RC.

The proposed installation for simultaneous and separate operation of a multilayer well with TMS works as follows.

After installing the installation for simultaneous and separate operation of a multilayer well with TMS in the cavities of blocks 11 ', 11 "and 11'" of regulation and accounting for flow rate, pressure P, temperature T, water content R and other parameters of the instrumentation fluid 25 of each of the reservoirs I, II are measured and III wells, separately. Control information on the technological parameters of the fluid in the wellbore from the instrumentation 25 is transmitted by the TMS to the control unit by the communication interface with the instrumentation 25 through the geophysical cables 34, 12 'and / or 12 "and / or 12" and the power cable 4 through the cable connector 13 and an adapter 14 TMS mounted on the end of the electric drive 5 of the pump 3, with the separation of signals. The operator of the PU analyzes the technological parameters of the fluid of each of the reservoirs I, II and III of the well and, according to the results of measuring the instrumentation 25, on a command from the PU to the stepper electric drive 31 TMS with a locking needle 30, changes the throughput section of the bypass saddle 29 of one or more RK 22 to achieve an acceptable value of technological parameters fluid reservoirs, which in a mixed state fill the cavity 10 of the casing 1 above the deep electric drive pump 3, after which the operator with PU starts the well into operation. Pump 3 pumps the borehole fluid from the cavity 10 of the casing 1, coming from the productive strata I, II and III of the well through the corresponding open radial channels 21 of the couplings 8 ', 8 "and 8", washing the instrument 25 below RK 24 blocks 11', 11 "and 11 '" control and accounting of the flow rate, window 32, the bypass seat 29, open the locking needle 30, the window 33 of the RC 24 through the cavity of the pipe 26, washing the instrument 25 above the RC 24, into the cavity of the pipe 6' and / or 6 "and / or 6 ″ housings communicating through the longitudinal channels 19 of the couplings 8 ′ and / or 8 ″ and / or 8 ″, then through the holes 17 in the support flange 16 and the cavity 10 of the casing 1 overhnost well. Flowing through the cavity of the nozzle 26, the flow meter 27 of the instrumentation fluid 25 measures the flow rate Q of the corresponding wellbore and transmits information about it to the control unit. During the operation of the well, flooding or depression of the productive formations of the I and / or II and / or III wells takes place, the latter being determined by the negative pressure difference in the formation and in the cavity 10 of the casing 1, measured by pressure sensors 25 before the bypass saddle 29 and above the stepwise actuator 31 shut-off needle 30. In order to improve the quality of the produced well fluid, it becomes necessary to selectively mix formation fluids in the cavity 10 of the casing 1 by changing the passage section of the bypass saddle 29 needle 30 using a stepper electric drive 31 TMS of one or more RK 22 to achieve an acceptable value of the technological parameters of the fluid reservoirs or shut off the flooded or depressive reservoir, which are carried out on command of the operator with PU.

The control information received from the deep instrumentation can be transmitted online via the GPRS or 3G data transmission system to any part of the world that has Internet access. In the same way, the transfer of control commands of RK 24 can occur.

Claims (9)

1. Installation of simultaneous and separate operation of a multilayer well with a telemechanical system, comprising a tubing string, a deep electric drive pump, a power cable supplying the submersible electric drive of the pump, and control valves made in glasses with a bypass saddle located below a pump in a housing equipped with packers and fixed in the casing with mechanical anchors, and instrumentation, characterized in that it contains a device The property of simultaneous and separate operation of the reservoirs, made in a housing consisting of a string of pipes equipped with packers and connected to each other and to the lower end of the housing by couplings for the cross-flow of fluids from the wellbore through the annular spaces; of all productive formations in the casing cavity above the device for simultaneous-separate operation of the formations, and the longitudinal channels of the lower coupling are blocked They are plugged, and the radial channels of the couplings are in communication with the annular space of the corresponding wellbore, while the couplings are equipped with blocks for controlling and recording flow rates of the strata containing a control valve and control and measuring devices, the latter are located above and / or below the control valve, interconnected by a geophysical a cable placed in a channel made in the wall of the glass, while the control units and metering flow are interconnected by geophysical cables and connected to the control point of the well a telecontrol system transmitting control commands regulating valves on the control item and the control information about the process parameters of the fluid in the formations of the well by measuring and control devices in the reverse direction with the separation signals by geophysical and power cables through the cable connector and the adapter installed on the end of the pump drive. 2. Installation according to claim 1, characterized in that the upper end of the housing is connected to the packer and secured with a mechanical anchor at the level of its end. 3. The installation according to claim 1, characterized in that the cable connector pin is mounted on a support flange mounted on the upper end of the housing, in which holes are made, communicating the cavity of the housing and the casing, and the geophysical cable is equipped with a socket of the contact pair installed in its centralizer the position relative to the pin of the contact pair, mounted on the electric drive of the pump, with the possibility of hermetically connecting them by pressing the socket on the pin of the electric drive of the pump, lowered into the casing pipe of the tubing pipes. 4. The installation according to claim 1, characterized in that the units for regulating and accounting for the flow rate of the seams are arranged to alternately land them from the wellhead into the nests of the respective couplings and dismantle them during repair and maintenance, for which the diameters of the seats of the blocks and couplings, respectively, are reduced top down. 5. Installation according to claim 1, characterized in that the geophysical cables in the sections between the support flange and the units for controlling the flow rate of the formations are placed in telescopic tubes equipped with compression springs, with the possibility of changing the distance between the control units and accounting for the flow rate of the formations during dismantling and alternating planting them in appropriate fluid cross fluid couplings. 6. Installation according to claim 1, characterized in that in the glass cavity from the side of the open end there is an electric drive locking needle interacting with the overflow seat, the step electric drive of which, upon command from the control point, informs the locking needle of the reciprocating movement with the possibility of regulating the fluid flow from the corresponding layer through the radial channels of the coupling and the cavity of the glass into the cavity of the housing through windows made in the wall of the glass on both sides of the bypass saddle. 7. Installation according to claim 1, characterized in that the fluid cross-flow couplings are made with a nozzle in which the control and measuring devices are located, at least the fluid flow meter of the corresponding well formation. 8. Installation according to claim 1, characterized in that in the fluid cross-coupling, annular valves are installed with the possibility of axial movement to open and close the radial channels of the fluid flow from the corresponding well formation during planting and their engagement during dismantling. 9. The installation according to claim 1, characterized in that the telemechanical control system for the control units and the formation flow meter is equipped with an interface for transmitting control commands to the control valves from the well control center and information from the control and measuring devices in the opposite direction through the GPRS or 3G communication system.

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