CN116411845A - Downhole electric control hydraulic communication device, well bore and system - Google Patents

Abstract

The invention relates to an underground electric control hydraulic communication device, a shaft and a system, wherein the underground electric control hydraulic communication device comprises a valve body, a valve core and a driving module. The input connection end of the valve body is respectively connected with a first hydraulic pipeline and a second hydraulic pipeline, and the output connection end of the valve body is respectively connected with a third hydraulic pipeline and a fourth hydraulic pipeline. The valve core is provided with first communication structure and second communication structure, and when the valve core is located the intercommunication position, first communication structure intercommunication first hydraulic pipeline and third hydraulic pipeline, second communication structure intercommunication second hydraulic pipeline and fourth hydraulic pipeline. The driving module comprises a displacement output piece, the displacement output piece is connected with the valve core, and the movement of the displacement output piece enables the linkage valve core to enter or leave the communication position. The control system has the advantages of compact integral structure, low manufacturing cost and high reliability, can be applied to any deep well and ultra-deep well, and has the advantages of high control mode flexibility and high integral practicability.

Description

Downhole electric control hydraulic communication device, well bore and system

Technical Field

The invention relates to the technical field of underground hydraulic systems, in particular to an underground electric control hydraulic communication device, a shaft and a system.

Background

Currently, the domestic hydraulic control type intelligent well completion system generally uses an n+1 mode to directly control the underground flow control valves of N production intervals, each production interval needs an opening hydraulic pipeline and an oil return pipeline, wherein the opening hydraulic pipelines need to be independently arranged, and the oil return pipelines can be arranged in a converging manner, namely the N underground flow control valves need the N opening oil inlet hydraulic pipelines and the 1 public oil return hydraulic pipeline, so that the N+1 hydraulic pipelines need to be lowered. The system is limited in underground space in a shaft and cannot be used for entering too many hydraulic pipelines, the current domestic N+1 mode hydraulic control intelligent well completion system can only be applied to shafts with the diameter of 7 inches and more, and can only generally control the production of three underground production intervals, and the mode is difficult to be applied to shafts with the diameter of 5.5 inches and less, so that the problem of lower practicability exists.

Disclosure of Invention

Aiming at the technical problems, the invention provides an underground electric control hydraulic communication device, a shaft and a system, which have the advantages of higher control mode flexibility and higher overall practicability.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a downhole electronically controlled hydraulic communication device comprising:

the input connection end of the valve body is respectively connected with a first hydraulic pipeline and a second hydraulic pipeline; the output connection end of the valve body is respectively connected with a third hydraulic pipeline and a fourth hydraulic pipeline;

the valve core is provided with a first communication structure and a second communication structure, when the valve core is positioned at a communication position, the first communication structure is communicated with the first hydraulic pipeline and the third hydraulic pipeline, and the second communication structure is communicated with the second hydraulic pipeline and the fourth hydraulic pipeline; and

the driving module comprises a displacement output piece, and the displacement output piece is connected with the valve core; movement of the displacement output member will link the valve spool into or out of the communication position.

In one embodiment, the valve body is provided with an inner cylinder for the valve core to linearly move;

the inner wall of the inner cylinder is provided with a first communication port, a second communication port, a third communication port and a fourth communication port at intervals along the axial direction;

the first communication port is communicated with the second hydraulic pipeline;

the second communication port is communicated with the fourth hydraulic pipeline;

the third communication port is communicated with the third hydraulic pipeline;

the fourth communication port communicates with the first hydraulic line.

In one embodiment, the outer wall of the valve core is in sealed sliding connection with the inner wall of the inner cylinder; the first communication structure comprises a first axial edge groove, and the second communication structure comprises a second axial edge groove;

the first shaft edge groove and the second shaft edge groove are concavely arranged on the outer wall of the inner cylinder, when the valve core moves to the communicating position, the first communicating port and the second communicating port are all positioned in the first shaft edge groove, the first shaft edge groove is communicated with the first communicating port and the second communicating port, the third communicating port and the fourth communicating port are all positioned in the second shaft edge groove, and the second shaft edge groove is communicated with the third communicating port and the fourth communicating port.

In one embodiment, the valve body is further provided with a blocking position;

when the valve core moves to the blocking position, the first shaft edge groove is separated from the second communication port, and the valve core blocks the first communication port and the second communication port; the second axial edge groove is separated from the fourth communication port, the second communication port and the third communication port are both positioned in the second axial edge groove, and the second axial edge groove is communicated with the second communication port and the third communication port.

In one embodiment, the driving module further comprises a driving motor, a fixing seat, a sliding block and a screw rod;

the fixed seat is fixed with the valve body, the sliding block is in sliding connection with the fixed seat, the screw rod is in threaded connection with the sliding block, and the screw rod is in transmission connection with an output shaft of the driving motor;

the displacement output piece comprises a push rod, the push rod is fixed with the sliding block, the driving motor is linked with the push rod through the sliding block, and the push rod is linked with the valve core to move.

In one embodiment, the ejector rod is in contact connection with the valve core, the valve body is provided with an elastic piece for driving the valve core to move towards the ejector rod, one end of the elastic piece is connected with the valve core, and the other end of the elastic piece is connected with the valve body.

In one embodiment, the driving module further comprises a first travel switch for driving the driving motor to stop running, and the first travel switch is arranged on the fixed seat;

the first travel switch is arranged corresponding to the communication position, and the sliding block triggers the first travel switch when the sliding block is linked with the valve core to reach the communication position;

the first travel switch is electrically connected with the driving motor.

In one embodiment, the driving module further comprises a second travel switch for driving the driving motor to stop running, and the second travel switch is arranged on the fixed seat;

the first travel switch is arranged corresponding to the partition position, and when the sliding block is linked with the valve core to reach the partition position, the sliding block triggers the second travel switch;

the second travel switch is electrically connected with the driving motor.

The application also provides an electric control hydraulic communication shaft, which comprises a cylinder body and the underground electric control hydraulic communication device according to the scheme, wherein the underground electric control hydraulic communication device is arranged on the cylinder body, and the driving module is further connected with an electric control pipeline.

The application also provides an electric control hydraulic communication system, which comprises the electric control hydraulic communication shaft according to the scheme, wherein the electric control hydraulic communication system comprises N production intervals, each production interval is correspondingly provided with the electric control hydraulic communication shaft, and adjacent electric control hydraulic communication shafts are connected in series;

the electric control hydraulic communication shafts share the electric control pipeline, the first hydraulic pipeline and the second hydraulic pipeline;

and the third hydraulic pipeline and the fourth hydraulic pipeline of each electric control hydraulic communication shaft are respectively connected with a driving oil port and an oil return port of the hydraulic output component corresponding to the production interval.

Due to the adoption of the technical scheme, the invention has the following advantages:

if the underground system is provided with a plurality of production intervals, the whole underground electric control hydraulic communication device is correspondingly arranged on each production interval, the plurality of underground electric control hydraulic communication devices are mutually connected in series, all the underground electric control hydraulic communication devices share a first hydraulic pipeline and a second hydraulic pipeline, when a hydraulic output component in a certain production interval is required to work, only a driving module in the corresponding underground electric control hydraulic communication device is required to be controlled, a displacement output component is enabled to be linked with a valve core to enter a communication position, at the moment, the first hydraulic pipeline is communicated with a third hydraulic pipeline through a first communication structure, the second hydraulic pipeline is communicated with a fourth hydraulic pipeline through a second communication structure, namely, a driving oil port of the hydraulic output component in the production interval is communicated with the first hydraulic pipeline, an oil return port is communicated with the second hydraulic pipeline, at the moment, the high-pressure hydraulic pipeline outputs high pressure to the hydraulic output component, the hydraulic output component is driven to normally operate, and oil return is carried out through a fourth hydraulic oil pipeline in the operation process;

when the hydraulic output part is required to stop working, the driving module in the corresponding underground electric control hydraulic communication device is controlled to enable the displacement output part to be linked with the valve core to leave the communication position, so that the high-pressure oil circuit connection of the hydraulic output part is blocked, and the hydraulic output part is caused to stop working. The underground electric control hydraulic communication device is integrally connected in series, so that the high-pressure oil pipeline and the low-pressure oil return pipeline can be shared, only two hydraulic oil pipelines need to be lowered when the underground electric control hydraulic communication device is integrally installed in a well, the arrangement of the underground hydraulic oil pipelines can be greatly optimized through the arrangement of the first hydraulic pipeline and the second hydraulic pipeline, when a plurality of production intervals are faced, the hydraulic output components in the production intervals can be driven to work through the series connection of the underground electric control hydraulic communication device, and compared with the prior art, the underground electric control hydraulic communication device has the advantages of compact integral structure, low manufacturing cost and high reliability, can be applied to any deep well and ultra-deep well, and has the advantages of high control mode flexibility and high integral practicability.

Drawings

FIG. 1 is a schematic diagram of a downhole electronically controlled hydraulic communication device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the internal structure of a downhole electronically controlled hydraulic communication device according to an embodiment of the present invention;

FIG. 3 is a schematic view showing a specific structure of a valve body according to an embodiment of the present invention;

FIG. 4 is a schematic view showing a specific structure of a first inner pipe according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a third internal pipe according to an embodiment of the present invention.

The figures are marked as follows:

10. a valve body; 101. an inner cylinder; 102. a first communication port; 103. a second communication port; 104. a third communication port; 105. a fourth communication port; 106. an elastic member;

20. a valve core; 201. a first axial edge groove; 202. a second axial edge groove;

30. a driving module; 301. a driving motor; 302. a fixing seat; 303. a slide block; 304. a screw; 305. a push rod; 306. a first travel switch; 307. a second travel switch; 308. a controller;

40. a first hydraulic line; 41. a second hydraulic line; 42. a third hydraulic line; 43. a fourth hydraulic line; 44. an electric control pipeline; 45. a first inner conduit; 46. a second inner conduit; 47. a third inner conduit; 48. a fourth inner conduit;

50. a cylinder; 51. and a communication member.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," "third," "fourth," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

At present, the domestic N+1 mode hydraulic control type intelligent well completion system can only be applied to wellbores with the diameter of 7 inches and more, and can only control three underground production intervals generally

Production, this approach is difficult to use in 5.5 inch and smaller wellbores, and has a problem of low practicality. Aiming at the prior art problems, the invention provides an underground electric control hydraulic communication device, a shaft and a system, which have the advantages of higher control mode flexibility and higher overall practicability.

The technical scheme of the invention is described in detail below with reference to specific examples.

Referring to fig. 1, 2 and 3, the present invention relates to a downhole electrically controlled hydraulic communication device, which comprises a valve body 10, a valve core 20 and a driving module 30. The input connection end of the valve body 10 is connected with a first hydraulic line 40 and a second hydraulic line 41, and the output connection end of the valve body 10 is connected with a third hydraulic line 42 and a fourth hydraulic line 43.

The valve core 20 is provided with a first communication structure and a second communication structure, when the valve core 20 is located at the communication position, the first communication structure communicates the first hydraulic line 40 with the third hydraulic line 42, and the second communication structure communicates the second hydraulic line 41 with the fourth hydraulic line 43.

The drive module 30 includes a displacement output member that is coupled to the valve spool 20, movement of the displacement output member moving the linked valve spool 20 into or out of the communication position.

It should be noted that, in this embodiment, the downhole electronically controlled hydraulic communication device is integrally applied to a well completion downhole system, where the system has a plurality of production intervals, each production interval is provided with a hydraulic output component, in the prior art, in order to control the hydraulic output component in each production interval, a high-pressure oil inlet hydraulic line needs to be lowered into the well for each hydraulic output component, and a low-pressure oil return hydraulic line for collecting and returning needs to be lowered into the well, but the downhole space in the well bore is limited, and too many hydraulic lines cannot be lowered, so that the downhole system with a plurality of production intervals cannot be handled in the prior art.

In contrast to the present solution, in this embodiment the first hydraulic line 40 is a line for outputting high pressure hydraulic oil to the hydraulic output means and the second hydraulic line 41 is a low pressure return line for the aggregate return. In addition, the third hydraulic line 42 is used for connecting with a driving oil port of a hydraulic output member corresponding to the production interval, and the fourth hydraulic line 43 is used for connecting with an oil return port of the hydraulic output member corresponding to the production interval.

For example, if the downhole system has a plurality of production intervals, the downhole electronically controlled hydraulic communication devices are integrally and correspondingly installed on each production interval, the downhole electronically controlled hydraulic communication devices are connected in series, all the downhole electronically controlled hydraulic communication devices share the first hydraulic line 40 and the second hydraulic line 41, when the hydraulic output component in a certain production interval is required to work, only the driving module 30 in the corresponding downhole electronically controlled hydraulic communication device is required to be controlled, the shift output piece is enabled to be in communication with the valve core 20, at this moment, the first hydraulic line 40 is communicated with the third hydraulic line 42 through the first communication structure, the second hydraulic line 41 is communicated with the fourth hydraulic line 43 through the second communication structure, namely, the driving oil port of the hydraulic output component in the production interval is communicated with the first hydraulic line 40, the oil return port is communicated with the second hydraulic line 41, at this moment, the high-pressure hydraulic line outputs high-pressure oil to the hydraulic output component, the hydraulic output component is driven to normally work, and the hydraulic return is carried out to the second hydraulic line 41 through the fourth hydraulic line 43 in the working process.

When the hydraulic output part is required to stop working, the driving module 30 in the corresponding underground electric control hydraulic communication device is controlled to enable the displacement output part to be in linkage with the valve core 20 to leave from the communication position, so that the high-pressure oil circuit connection of the hydraulic output part is blocked, and the hydraulic output part is caused to stop working. The whole underground electric control hydraulic communication device can share the high-pressure oil pipeline and the low-pressure oil return pipeline in a serial connection mode, so that when the whole underground electric control hydraulic communication device is installed, only two hydraulic oil pipelines need to be lowered, namely the first hydraulic pipeline 40 and the second hydraulic pipeline 41, the arrangement of the underground hydraulic oil pipelines can be greatly optimized, when a plurality of production intervals are faced, the hydraulic output components in the production intervals can be driven to work through the serial connection underground electric control hydraulic communication device, and compared with the prior art, the underground electric control hydraulic communication device has the advantages of compact whole structure, low manufacturing cost and high reliability, can be applied to any deep well and ultra-deep well, and has the advantages of higher flexibility of control modes and higher whole practicality.

Referring to fig. 2 and 3, in an embodiment, the valve body 10 is further refined, the valve body 10 is provided with an inner cylinder 101 for the valve core 20 to linearly move, and the inner wall of the inner cylinder 101 is provided with a first communication port 102, a second communication port 103, a third communication port 104 and a fourth communication port 105 at intervals along the axial direction. Wherein the first communication port 102 communicates with the second hydraulic line 41; the second communication port 103 communicates with the fourth hydraulic line 43; third communication port 104 communicates with third hydraulic line 42; the fourth communication port 105 communicates with the first hydraulic line 40.

Illustratively, by moving the spool 20, the first communication structure and the second communication structure can control the connection manner of the first communication port 102, the second communication port 103, the third communication port 104, and the fourth communication port 105.

In this embodiment, further refinement is made on the valve core 20, where the outer wall of the valve core 20 is in sealed sliding connection with the inner wall of the inner cylinder 101, and the first communication structure includes a first axial edge groove 201 and the second communication structure includes a second axial edge groove 202.

The first flange groove 201 and the second flange groove 202 are both concavely formed on the outer wall of the inner cylinder 101, when the valve core 20 moves to the communicating position, the first communicating port 102 and the second communicating port 103 are both located in the first flange groove 201, the first flange groove 201 communicates with the first communicating port 102 and the second communicating port 103, the third communicating port 104 and the fourth communicating port 105 are both located in the second flange groove 202, and the second flange groove 202 communicates with the third communicating port 104 and the fourth communicating port 105.

In this embodiment, the first communication port 102, the second communication port 103, the third communication port 104, and the fourth communication port 105 are provided at intervals along the axial direction of the inner tube 101, and the outer wall of the valve body 20 is hermetically and slidably connected to the inner wall of the inner tube 101 during the movement of the valve body 20, so that the valve body 20 can hermetically seal the first communication port 102, the second communication port 103, the third communication port 104, and the fourth communication port 105. After the valve core 20 moves to the communicating position, the first communicating port 102 and the second communicating port 103 are all located in the first axial edge groove 201, the third communicating port 104 and the fourth communicating port 105 are all located in the second axial edge groove 202, and the first axial edge groove 201 and the second axial edge groove 202 are concavely arranged, so that a cavity for liquid to enter is formed by the first axial edge groove 201 and the second axial edge groove 202, and the communicating structure can be realized.

In this embodiment, more preferably, the valve body 10 is further provided with a blocking position, and it should be noted that the blocking position is mainly used for controlling the hydraulic output component in the downhole production interval to stop working, and the following two cases can cause the hydraulic output component to stop working, firstly, by moving the valve core 20, the connection among the first communication port 102, the second communication port 103, the third communication port 104 and the fourth communication port 105 is completely cut off, so that the first communication port 102, the second communication port 103, the third communication port 104 and the fourth communication port 105 are mutually sealed; second, by moving the valve body 20, the first communication port 102 and the fourth communication port 105 are sealed, the second communication port 103 and the third communication port 104 are communicated, and at this time, the oil return port of the hydraulic output member is communicated with the driving oil port, and the hydraulic output member is in a hydraulic balance state, so that the whole is stopped in operation.

Specifically, in this embodiment, the first communication port 102, the second communication port 103, the third communication port 104, and the fourth communication port 105 are distributed at uniform intervals as a whole, wherein the width values of the first axial edge groove 201 and the second axial edge groove 202 are the distance values between the first communication port 102 and the second communication port 103;

when the valve core 20 is positioned at the communicating position, the first communicating port 102 and the second communicating port 103 are both positioned in the first axial edge groove 201, and the third communicating port 104 and the fourth communicating port 105 are both positioned in the second axial edge groove 202;

when the valve core 20 enters the blocking position from the communicating position, the valve core 20 moves upwards as a whole, the first communicating port 102 and the second communicating port 103 are gradually separated, the third communicating port 104 and the fourth communicating port 105 are also gradually separated, after the blocking position is reached, as shown in fig. 3, the first communicating port 102 is positioned in the first axial edge groove 201, the second communicating port 103 and the third communicating port 104 are positioned in the second axial edge groove 202, the fourth communicating port 105 is sealed by the outer wall of the valve core 20, at this time, the oil return port of the hydraulic output part is communicated with the driving oil port, the hydraulic output part is in a hydraulic balance state, and the whole is in a stop working state.

Referring to fig. 4 and 5, in particular, in this embodiment, in order to facilitate the connection of the first hydraulic line 40, the second hydraulic line 41, the third hydraulic line 42, and the fourth hydraulic line 43, a first internal pipe 45, a second internal pipe 46, a third internal pipe 47, and a fourth internal pipe 48 are provided inside the valve body 10, respectively, and each hydraulic line is connected to a corresponding communication port through a corresponding internal pipe.

In this embodiment, the driving module 30 is further refined, and the driving module 30 further includes a driving motor 301, a fixing base 302, a slider 303, and a screw 304. Wherein, fixing base 302 is fixed with valve body 10, slider 303 and fixing base 302 sliding connection, screw rod 304 and slider 303 threaded connection, screw rod 304 pass through the shaft coupling and drive motor 301's output shaft transmission is connected. The displacement output piece comprises a push rod 305, the push rod 305 is fixed with the sliding block 303, the driving motor 301 is linked with the push rod 305 through the sliding block 303, and the push rod 305 is linked with the valve core 20 to move.

For example, when the valve core 20 needs to be switched to the communication position, the driving motor 301 is started, the rotation of the output shaft drives the screw 304 to rotate synchronously, and the sliding block 303 is connected with the fixed seat 302 in a sliding way, and the sliding block 303 is connected with the screw 304 in a threaded way, so that the rotation of the output shaft is converted into linear movement of the sliding block 303 through the movement of the screw 304, and finally the sliding block 303 pushes the valve core 20 to move through the ejector rod 305, and when the valve core 20 reaches the communication position, the driving motor 301 is stopped; on the contrary, when the valve core 20 needs to be switched to the blocking position, the driving motor 301 is started, and the driving motor 301 is controlled to reversely rotate, at the moment, the output shaft drives the valve core 20 to reversely move through the ejector rod 305, and after the valve core 20 reaches the blocking position, the driving motor 301 stops working, and through the arrangement of the structure, the driving and linkage effects are realized.

It should be noted that, the connection between the ejector rod 305 and the valve core 20 may be a hard fixed connection or a contact connection, and when the hard fixed connection is performed, the movement of the valve core 20 is synchronously linked by the movement of the ejector rod 305, in an embodiment, the ejector rod 305 is connected to the valve core 20 in a contact manner, the valve body 10 is provided with an elastic member 106 driving the valve core 20 to move toward the ejector rod 305, one end of the elastic member 106 is connected to the valve core 20, and the other end is connected to the valve body 10.

Illustratively, when the valve core 20 is switched to the communication position, the ejector rod 305 pushes the valve core 20 to move, when the valve core 20 reaches the communication position, the driving motor 301 is stopped, and the elastic member 106 is gradually compressed during the movement of the valve core 20; on the contrary, when the valve core 20 needs to be switched to the blocking position, the driving motor 301 is started, the driving motor 301 is controlled to rotate reversely, at the moment, the output shaft drives the ejector rod 305 to move reversely, and in the moving process of the ejector rod 305, the valve core 20 is tightly pressed on the ejector rod 305 under the action of the elastic force of the elastic piece 106, so that the valve core 20 moves synchronously along with the ejector rod 305, and after the valve core 20 reaches the blocking position, the driving motor 301 stops working, and through the structural arrangement, the driving and linkage effects are realized.

Preferably, in this embodiment, to optimize the accuracy of the movement of the valve core 20, the driving module 30 further includes a first travel switch 306 for driving the driving motor 301 to stop running, the first travel switch 306 is electrically connected to the driving motor 301, and the first travel switch 306 is disposed on the fixed seat 302. The first travel switch 306 is arranged corresponding to the communication position, and when the slider 303 links the valve core 20 to reach the communication position, the slider 303 triggers the first travel switch 306.

The driving module 30 further includes a second travel switch 307 for driving the driving motor 301 to stop, the second travel switch 307 is disposed on the fixing base 302, and the second travel switch 307 is electrically connected to the driving motor 301. The first travel switch 306 is provided corresponding to the off position, and when the slider 303 moves to the valve element 20 to the off position, the slider 303 activates the second travel switch 307.

Through the arrangement of the first travel switch 306 and the second travel switch 307, when the starting driving motor 301 is linked with the valve core 20 to reach a communication position, the sliding block 303 triggers the first travel switch 306, and at the moment, the first travel switch 306 is linked with the driving motor 301 to stop running; when the driving motor 301 moves to the blocking position in conjunction with the valve core 20, the slider 303 triggers the second travel switch 307, and at this time, the second travel switch 307 controls the driving motor 301 to stop running.

The first hydraulic line 40 is a line for outputting high-pressure hydraulic oil to the hydraulic output unit, and the second hydraulic line 41 is a low-pressure return line for the total return flow. In addition, the third hydraulic line 42 is used for connecting with a driving oil port of a hydraulic output member corresponding to the production interval, and the fourth hydraulic line 43 is used for connecting with an oil return port of the hydraulic output member corresponding to the production interval.

When the downhole system is provided with a plurality of production intervals, the downhole electric control hydraulic communication devices are integrally and correspondingly arranged on each production interval, the plurality of downhole electric control hydraulic communication devices are connected in series, and all the downhole electric control hydraulic communication devices share the first hydraulic pipeline 40 and the second hydraulic pipeline 41.

When the hydraulic output component in a certain production interval is required to work, the driving module 30 in the corresponding underground electric control hydraulic communication device is controlled, the ejector rod 305 pushes the valve core 20 to move, when the valve core 20 reaches the communication position, the sliding block 303 triggers the first travel switch 306, and at the moment, the first travel switch 306 jointly controls the driving motor 301 to stop running. At this time, the first hydraulic line 40 is communicated with the third hydraulic line 42 through the first communication structure, the second hydraulic line 41 is communicated with the fourth hydraulic line 43 through the second communication structure, that is, the driving oil port of the hydraulic output component in the production interval is communicated with the first hydraulic line 40, the oil return port is communicated with the second hydraulic line 41, at this time, the high-pressure hydraulic line outputs high-pressure oil to the hydraulic output component, the driving hydraulic output component normally operates, and oil return is performed to the second hydraulic line 41 through the fourth hydraulic line 43 in the operation process.

When the hydraulic output part is required to stop working, the driving module 30 in the corresponding underground electric control hydraulic communication device is controlled, the driving motor 301 is started, the driving motor 301 is controlled to rotate reversely, the output shaft drives the ejector rod 305 to move reversely, and in the moving process of the ejector rod 305, the valve core 20 is pressed on the ejector rod 305 under the action of the elastic force of the elastic piece 106, so that the valve core 20 moves synchronously along with the ejector rod 305, when the valve core 20 reaches the isolating position, the sliding block 303 triggers the second travel switch 307, and the second travel switch 307 is connected with the driving motor 301 to stop running. At the moment, an oil return port of the hydraulic output component is communicated with the driving oil port, the hydraulic output component is in a hydraulic balance state, and the whole hydraulic output component is in a stop working state.

The application also provides an electric control hydraulic communication shaft, which is shown with reference to fig. 1, 2 and 3, and comprises a cylinder 50 and an underground electric control hydraulic communication device mentioned in the scheme, wherein the underground electric control hydraulic communication device is arranged on the cylinder 50, and the driving module 30 is also connected with an electric control pipeline 44.

In an embodiment, the valve body 10 is fixedly connected with the cylinder 50 through a bolt, and the driving module 30 is integrally disposed inside the cylinder 50, wherein the driving motor 301 and the fixing base 302 are fixedly connected with the cylinder 50. The driving module 30 further includes a controller 308, the controller 308 is fixedly installed inside the cylinder 50, the controller 308 is electrically connected to the electric control pipeline 44, the driving motor 301, the first travel switch 306 and the second travel switch 307 are all electrically connected to the controller 308, and when the first travel switch 306 or the second travel switch 307 is triggered by the slider 303 during actual operation, a signal is fed back to the controller 308, and then the controller 308 controls the driving motor 301 to stop working. The operator is able to operate the downhole electronically controlled hydraulic communication device via the electronically controlled line 44.

In addition, in order to facilitate assembly of the valve body 10 and the driving module 30, a communication member 51 is provided between the valve body 10 and the driving module 30, one end of the communication member 51 is screwed with the valve body 10, the other end is screwed with the cylinder 50, and as shown, the ejector rod 305 penetrates into the valve body 10 through the communication member 51.

Meanwhile, in order to facilitate the wiring of the first hydraulic line 40, the second hydraulic line 41 and the electric control line 44, three through-type line passages are correspondingly provided on the cylinder 50. In addition, the third hydraulic line 42 and the fourth hydraulic line 43 are also embedded in the inner cylinder 101.

In contrast to the prior art, if the downhole system has a plurality of production intervals, the downhole electrically-controlled hydraulic communication devices are integrally and correspondingly installed on each production interval, and the plurality of downhole electrically-controlled hydraulic communication devices are connected in series, so that all the downhole electrically-controlled hydraulic communication devices share the first hydraulic line 40, the second hydraulic line 41 and the electrically-controlled line 44. The underground electric control hydraulic communication device can be integrally connected in series, so that the high-pressure oil pipeline, the low-pressure oil return pipeline and the electrified control pipeline are shared, when the underground electric control hydraulic communication device is integrally installed in a well, the pipelines only need to be lowered by three pipelines, namely the first hydraulic pipeline 40, the second hydraulic pipeline 41 and the electric control pipeline 44, the arrangement of the underground hydraulic oil pipeline can be greatly optimized, when a plurality of production intervals are faced, the underground electric control hydraulic communication device can be connected in series to drive hydraulic output components in the plurality of production intervals to work, and compared with the prior art, the underground electric control hydraulic communication device has the advantages of compact integral structure, low manufacturing cost and high reliability, can be applied to any deep well and ultra-deep well, and has the advantages of high flexibility of control modes and high integral practicability.

The application still provides an automatically controlled hydraulic communication system, and with reference to figures 1, 2 and 3 show, automatically controlled hydraulic communication pit shaft in including above-mentioned scheme, automatically controlled hydraulic communication system includes N production intervals, and every production interval all corresponds and is provided with automatically controlled hydraulic communication pit shaft, establishes ties each other between the adjacent automatically controlled hydraulic communication pit shaft. The electrically controlled hydraulic communicating bores all share an electrically controlled line 44, a first hydraulic line 40 and a second hydraulic line 41. The third hydraulic line 42 and the fourth hydraulic line 43 of each electrically controlled hydraulic communication wellbore are respectively connected with the driving oil port and the oil return port of the hydraulic output unit of the corresponding production interval.

In a specific embodiment, the system comprises 10 production intervals, 10 shafts are correspondingly arranged, the shafts are connected in series, an electric control pipeline 44, a first hydraulic pipeline 40 and a second hydraulic pipeline 41 are connected to the shafts, and a third hydraulic pipeline 42 and a fourth hydraulic pipeline 43 on the shafts are respectively connected with a driving oil port and an oil return port of a hydraulic output component of the corresponding production interval.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An electronically controlled downhole hydraulic communication device, comprising:

the input connection end of the valve body is respectively connected with a first hydraulic pipeline and a second hydraulic pipeline; the output connection end of the valve body is respectively connected with a third hydraulic pipeline and a fourth hydraulic pipeline;

the valve core is provided with a first communication structure and a second communication structure, when the valve core is positioned at a communication position, the first communication structure is communicated with the first hydraulic pipeline and the third hydraulic pipeline, and the second communication structure is communicated with the second hydraulic pipeline and the fourth hydraulic pipeline; and

the driving module comprises a displacement output piece, and the displacement output piece is connected with the valve core; movement of the displacement output member will link the valve spool into or out of the communication position.

2. The downhole electrically controlled hydraulic communication device according to claim 1, wherein the valve body is provided with an inner cylinder for the valve core to move linearly;

the inner wall of the inner cylinder is provided with a first communication port, a second communication port, a third communication port and a fourth communication port at intervals along the axial direction;

the first communication port is communicated with the second hydraulic pipeline;

the second communication port is communicated with the fourth hydraulic pipeline;

the third communication port is communicated with the third hydraulic pipeline;

the fourth communication port communicates with the first hydraulic line.

3. The downhole electrically controlled hydraulic communication device according to claim 2, wherein the outer wall of the spool is in sealed sliding connection with the inner wall of the inner barrel; the first communication structure comprises a first axial edge groove, and the second communication structure comprises a second axial edge groove;

the first shaft edge groove and the second shaft edge groove are concavely arranged on the outer wall of the inner cylinder, when the valve core moves to the communicating position, the first communicating port and the second communicating port are all positioned in the first shaft edge groove, the first shaft edge groove is communicated with the first communicating port and the second communicating port, the third communicating port and the fourth communicating port are all positioned in the second shaft edge groove, and the second shaft edge groove is communicated with the third communicating port and the fourth communicating port.

4. A downhole electrically controlled hydraulic communication device according to claim 3, wherein the valve body is further provided with a shut-off position;

when the valve core moves to the blocking position, the first shaft edge groove is separated from the second communication port, and the valve core blocks the first communication port and the second communication port; the second axial edge groove is separated from the fourth communication port, the second communication port and the third communication port are both positioned in the second axial edge groove, and the second axial edge groove is communicated with the second communication port and the third communication port.

5. The downhole electronically controlled hydraulic communication device of claim 4, wherein the drive module further comprises a drive motor, a stationary seat, a slider, and a screw;

the fixed seat is fixed with the valve body, the sliding block is in sliding connection with the fixed seat, the screw rod is in threaded connection with the sliding block, and the screw rod is in transmission connection with an output shaft of the driving motor;

the displacement output piece comprises a push rod, the push rod is fixed with the sliding block, the driving motor is linked with the push rod through the sliding block, and the push rod is linked with the valve core to move.

6. The downhole electrically controlled hydraulic communication device according to claim 5, wherein the plunger is in contact connection with the valve core, the valve body is provided with an elastic member for driving the valve core to move toward the plunger, one end of the elastic member is connected with the valve core, and the other end of the elastic member is connected with the valve body.

7. A downhole electrically controlled hydraulic communication device according to claim 5, wherein the drive module further comprises a first travel switch for actuating the drive motor to cease operation, the first travel switch being disposed on the holder;

the first travel switch is arranged corresponding to the communication position, and the sliding block triggers the first travel switch when the sliding block is linked with the valve core to reach the communication position;

the first travel switch is electrically connected with the driving motor.

8. A downhole electronically controlled hydraulic communication device according to claim 5, wherein the drive module further comprises a second travel switch for actuating the drive motor to cease operation, the second travel switch being disposed on the mounting base;

the first travel switch is arranged corresponding to the partition position, and when the sliding block is linked with the valve core to reach the partition position, the sliding block triggers the second travel switch;

the second travel switch is electrically connected with the driving motor.

9. An electrically controlled hydraulic communication wellbore comprising a barrel and an electrically controlled hydraulic communication device according to any one of claims 1-8 disposed on the barrel, the drive module further being connected to an electrically controlled line.

10. An electrically controlled hydraulic communication system comprising the electrically controlled hydraulic communication wellbore of claim 9, the electrically controlled hydraulic communication system comprising N production intervals, each production interval being correspondingly provided with the electrically controlled hydraulic communication wellbore, adjacent electrically controlled hydraulic communication wellbores being connected in series with each other;

the electric control hydraulic communication shafts share the electric control pipeline, the first hydraulic pipeline and the second hydraulic pipeline;

and the third hydraulic pipeline and the fourth hydraulic pipeline of each electric control hydraulic communication shaft are respectively connected with a driving oil port and an oil return port of the hydraulic output component corresponding to the production interval.

Images