CN114704224B - Intelligent well completion underground digital hydraulic communication controller - Google Patents
Intelligent well completion underground digital hydraulic communication controller Download PDFInfo
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- CN114704224B CN114704224B CN202210489851.1A CN202210489851A CN114704224B CN 114704224 B CN114704224 B CN 114704224B CN 202210489851 A CN202210489851 A CN 202210489851A CN 114704224 B CN114704224 B CN 114704224B
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- lock sleeve
- piston
- hydraulic cavity
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
An intelligent well completion underground digital hydraulic communication controller is characterized in that an upper joint is arranged at one end of a valve body, a lower joint is arranged at the other end of the valve body, a piston is arranged in the valve body, two ends of the piston extend into the upper joint and the lower joint respectively, piston stop structures are arranged in the upper joint and the lower joint, a lock sleeve is arranged between the piston and the valve body, a first reset elastic structure body is sleeved on the piston in a seventh hydraulic cavity formed between the upper part of the lock sleeve and the piston, a first radial groove and the lock sleeve are sequentially processed on the outer side wall of the valve body to form a sixth hydraulic cavity, a second radial groove and the lock sleeve form a fifth hydraulic cavity, a third radial groove and the lock sleeve form a fourth hydraulic cavity, a fourth radial groove and the lock sleeve form a third hydraulic cavity are processed on the lock sleeve positioned on the inner side of the fourth hydraulic cavity, a first hydraulic cavity is formed between the piston and the valve body in the axial lower side of the lock sleeve, and the piston is provided with a second reset elastic structure body.
Description
Technical Field
The invention belongs to the technical field of equipment for extracting oil, gas, water, soluble or meltable substances or mineral slurry from a well, and particularly relates to a well completion underground digital hydraulic communication controller.
Background
The intelligent well completion technology in China has been developed for many years, and is widely applied to thousands of oil-water wells in more than ten oil fields in China. The hydraulic sliding sleeve reversing movement of the hydraulic sliding sleeve of the underground flow control valve of the hydraulic control intelligent well completion system is a key core technology for realizing underground fluid control.
At present, the domestic hydraulic control type intelligent well completion system directly controls N underground flow control valves in an N+1 mode, namely N underground flow control valves need N open oil inlet hydraulic pipelines and 1 public closed oil return hydraulic pipeline, because the underground space is limited, the number of the hydraulic pipelines which can be put in is limited, so that the controlled production intervals are limited, and at present, the production of three underground production intervals is controlled in a 3+1 mode generally in China, and the mode is difficult to be used in a slim hole and is used for controlling more production intervals. The domestic and foreign hydraulic control type intelligent well completion system uses the underground hydraulic decoder to be connected with the flow control valve to realize that three hydraulic pipelines control the production of six production intervals, and further reduces the number of hydraulic pipelines. The hydraulic decoders in the well can identify hydraulic signals and control the hydraulic decoders in six production intervals in the well through the high-low pressure hydraulic signal sequencing of three hydraulic pipelines, and the flow regulation and control of the flow control valve in the well are realized. The domestic test type I underground hydraulic decoder adopts a plurality of single-phase valves and hydraulic pipelines to bridge and build a complex hydraulic reversing pipeline in a cavity between a central pipe and a protection cylinder, the whole pipeline structure is complex and difficult to manufacture, and the structure is difficult to be used in a slim hole due to the size limitation of the single-phase valves and a sealing joint. The domestic test type II underground hydraulic decoder adopts a single lock sleeve locking mechanism, the inner wall of the lock sleeve blocks the radial movement of the locking ball, and the locking ball is clamped in a clamping groove on the valve core to lock the valve core. When the lock sleeve moves under the action of low-pressure unlocking liquid to enable the unlocking groove on the lock sleeve to move to the center position of the locking ball, the valve core moves under the action of high-pressure pushing liquid, the locking ball radially moves into the unlocking groove on the lock sleeve under the pushing of the valve core to unlock, the high-pressure hydraulic channel and the low-pressure hydraulic channel are respectively communicated with the opening hydraulic channel and the closing hydraulic channel of the flow control valve, and the valve core and the lock sleeve return to the initial positions under the elasticity of respective springs after the high-pressure hydraulic is unloaded; when the actual hydraulic force loaded by the high-low pressure hydraulic channel is opposite, namely, the lock sleeve is pushed by the high pressure greater than the unlocking hydraulic force to push the unlocking groove on the lock sleeve to move beyond the center position of the locking ball, the inner wall of the lock sleeve still blocks the radial movement of the locking ball, the locking ball is clamped in the clamping groove on the valve core to lock the valve core, the valve core cannot move under the high pressure pushing hydraulic force, and only the hydraulic decoder can complete unlocking after receiving the correct hydraulic sequence. Such a hydraulic decoder has the following problems: firstly, due to pressure loss on a downhole long hydraulic pipeline, the actual hydraulic force is smaller than the unlocking hydraulic force after the low-pressure unlocking hydraulic force loaded by a wellhead is transmitted to a downhole hydraulic decoder, so that an unlocking groove on a lock sleeve does not move to the center of a locking ball, a locking ball is still clamped in a clamping groove on a valve core to lock the valve core, the unlocking is disabled, and the valve core cannot move under high-pressure pushing hydraulic force; when the hydraulic force loaded by a wellhead is larger than unlocking hydraulic force, the actual hydraulic force is larger than unlocking hydraulic force after the hydraulic force is transferred to a downhole hydraulic decoder through a downhole long hydraulic pipeline, so that the unlocking groove on the lock sleeve moves beyond the central position of the locking ball, the locking ball is still clamped in the clamping groove on the valve core, the locking valve core is unlocked and fails, the valve core cannot move under the action of high-pressure pushing hydraulic force, and the unlocking failure is extremely likely to be caused by the fact that the unlocking is failed due to the fact that the ground hydraulic operation errors, therefore, a single lock sleeve structure needs to be precisely loaded with a low-pressure unlocking hydraulic force value by the wellhead, the ground hydraulic operation difficulty is larger, the unlocking hydraulic force of the lock sleeve is larger than the unlocking hydraulic force of the lock sleeve, the opening or closing hydraulic force of the flow control valve is far larger than the unlocking hydraulic force of the lock sleeve, the lock sleeve is not provided with a positioning structure, the lock sleeve spring cannot be effectively protected, the lock sleeve spring is directly compressed to the bottom through the opening or closing action of the flow control valve, the lock sleeve spring is easy to be elastically failed due to the fact that the lock sleeve cannot reset to the initial position, the lock sleeve is reset after the lock sleeve spring is repeatedly compressed for many times, the hydraulic decoder is required to be used for recognizing the hydraulic force signals, the fact that the hydraulic force is lost, the hydraulic force is completely is lost, the problem that the lock sleeve can be easily is solved by the whole through the repeated operation, and the error is solved, and the first step is greatly is solved, and the problem is due to the repeated, and the operation is due to the repeated operation of the failure of the spring has high failure mode is caused by the spring and has high compression failure mode and has high failure.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the intelligent well completion underground digital hydraulic communication controller which has reasonable summation, compact structure, safety, reliability and capability of reducing the ground hydraulic operation program.
The technical scheme adopted for solving the technical problems is as follows: an intelligent well completion underground digital hydraulic communication controller is characterized in that one end of a valve body is provided with an upper joint, the other end of the valve body is provided with a lower joint, pistons are arranged in the valve body, two ends of each piston extend into the upper joint and the lower joint respectively, piston stop structures are arranged in the upper joint and the lower joint, a lock sleeve is arranged between each piston and the valve body, a seventh hydraulic cavity is formed between the upper part of each lock sleeve and each piston, a first reset elastic structure body is sleeved on each piston in each seventh hydraulic cavity, a first radial groove and each lock sleeve are sequentially formed in the valve body outside each seventh hydraulic cavity to form a sixth hydraulic cavity, a second radial groove and each lock sleeve are sequentially formed in each second radial groove and each lock sleeve to form a fifth hydraulic cavity, a fourth radial groove and each lock sleeve are formed in each lock sleeve positioned on the inner side of each fourth hydraulic cavity to form a third hydraulic cavity, a first hydraulic cavity is formed between each piston and the valve body which is arranged below each lock sleeve, and a second reset elastic structure body is sleeved on each piston;
the first hydraulic channel, the second hydraulic channel and the third hydraulic channel which are axially arranged in the inner direction are machined in the circumferential direction of the side wall of the valve body, and the fourth hydraulic channel and the fifth hydraulic channel are axially machined in the side wall of the lower end of the valve body;
the first hydraulic channel is communicated with a fifth hydraulic cavity through a first radial channel on the side wall of the valve body, and the fifth hydraulic cavity is communicated with a seventh hydraulic cavity through a second radial channel on the side wall of the lock sleeve;
the second hydraulic channel is communicated with a fourth hydraulic cavity through a third radial channel on the side wall of the valve body, and the fourth hydraulic cavity is communicated with the third hydraulic cavity through a seventh radial channel on the side wall of the lock sleeve;
the third hydraulic channel is communicated with the first hydraulic cavity through a fourth radial channel on the side wall of the valve body;
the fourth hydraulic passage is communicated with the sixth hydraulic chamber through a fifth radial passage on the side wall of the valve body;
the fifth hydraulic passage is communicated with the second hydraulic chamber through a sixth radial passage on the side wall of the valve body.
As a preferable technical scheme, the central hole of the valve body is formed by sequentially connecting a first cylindrical hole, a second cylindrical hole and a third cylindrical hole from top to bottom, the diameter of the first cylindrical hole is larger than that of the second cylindrical hole, and a chamfer is machined at the joint of the first cylindrical hole and the second cylindrical hole to form a locking sleeve stop structure.
As a preferable technical scheme, the central hole of the lower joint is formed by sequentially connecting a first cylindrical end face hole, a cylindrical middle hole and a second cylindrical end face hole, the end of the lower joint where the second cylindrical end face hole is located is connected with the valve body, the aperture of the second cylindrical end face hole is larger than that of the cylindrical middle hole, and a chamfer is processed at the joint of the second cylindrical end face hole and the cylindrical middle hole to form a piston stop structure; the upper joint and the lower joint have the same structure.
As an optimized technical scheme, the upper joint and the valve body form a static seal through a sealing ring, the piston and the upper joint form a dynamic seal through the sealing ring, the piston and the lower joint form a dynamic seal through the sealing ring, the lock sleeve and the valve body form a dynamic seal through the sealing ring, and the lock sleeve and the valve body form a dynamic seal through the sealing ring.
As a preferable technical scheme, the first reset elastic structure body is an annular seat provided with a spring.
As a preferable technical scheme, the second reset elastic structure body is a spring.
As a preferable technical scheme, the joints of the valve body, the upper joint and the lower joint are provided with radial pins.
As an optimized technical scheme, exhaust holes which are respectively communicated with the second hydraulic cavity, the fourth hydraulic cavity, the fifth hydraulic cavity and the sixth hydraulic cavity are formed in the outer side wall of the valve body, and sealing plugs are arranged on the exhaust holes.
As a preferred solution, the valve body side wall is shown provided with a line groove axially.
The beneficial effects of the invention are as follows:
according to the hydraulic linkage novel locking mechanism formed by the piston and the lock sleeve, a steel ball locking mechanism with a complex structure is omitted, and the reliability of identifying hydraulic signals is improved; the invention adopts the structure that the multiple dynamic sealing structures in the prior art are reduced to two dynamic sealing structures, the whole structure is composed of nine simple structural parts, the whole structure is reduced by more than half parts, the whole length is shortened by half, and the stability and the reliability of the whole tool are improved after the structure is simplified; the first return spring and the second return spring bear load together, so that the spring is prevented from being fatigued, no additional hydraulic pipeline is needed for providing hydraulic force for auxiliary return, the ground hydraulic operation procedure is simplified, and the working reliability of the whole tool is enhanced; the whole of the invention adopts a concentric structure, and the lock sleeve adopts a concentric two-position two-way valve core structure, so that the radial dimension can be reduced or enlarged in the same proportion and then used in all the size wellholes; the valve body has a simple internal structure, and reduces the machining difficulty.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a bottom view of fig. 1.
Fig. 4 is a cross-sectional view A-A of fig. 2.
Fig. 5 is a B-B cross-sectional view of fig. 3.
Fig. 6 is a C-C cross-sectional view of fig. 3.
Fig. 7 is a D-D cross-sectional view of fig. 3.
Wherein: an upper joint 1; a valve body 2; a lower joint 3; an annular seat 4; a first return spring 5; a piston 6; a lock sleeve 7; a second return spring 8; a sealing plug 9; a second hydraulic passage 21; a first hydraulic passage 22; a third hydraulic passage 23; a fourth hydraulic passage 24; a fifth hydraulic passage 25; a first radial channel 221; a second radial channel 71; a third radial channel 221; a fourth radial channel 231; a fifth radial channel 241; a sixth radial channel 251; a seventh radial passage 72; a first hydraulic chamber a; a second hydraulic chamber b; a third hydraulic chamber c; a fourth hydraulic chamber d; a fifth hydraulic chamber e; a sixth hydraulic chamber f; and a seventh hydraulic chamber g.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited to the following embodiments.
In fig. 1 to 7, the intelligent well completion downhole digital hydraulic communication controller of the embodiment comprises an upper joint 1, a valve body 2, a lower joint 3, an annular seat 4, a first return spring 5, a piston 6, a lock sleeve 7 and a second return spring 8; the sealing plug 9 is connected.
The central hole of the valve body 2 is formed by sequentially connecting a first cylindrical hole, a second cylindrical hole and a third cylindrical hole from top to bottom, the diameter of the first cylindrical hole is larger than that of the second cylindrical hole, a chamfer is processed at the joint of the first cylindrical hole and the second cylindrical hole to form a lock sleeve stop structure, an upper joint 1 and a lock sleeve 7 are arranged in the first cylindrical hole of the valve body 2, a lower joint 3 is arranged on the third cylindrical hole, radial pins are arranged at the joint of the valve body 2 and the upper joint 1 and the lower joint 3 to prevent the valve body 2 from generating circumferential rotation, the upper joint 1 and the valve body 2 form static seal through a sealing ring, the lock sleeve 7 and the valve body 2 form dynamic seal through the sealing ring, a piston 6 is arranged in the lock sleeve 7, two ends of the piston 6 respectively extend into the upper joint 1 and the lower joint 3, the piston 6 and the upper joint 1 form dynamic seal through the sealing ring, the lower joint 3 form dynamic seal through the sealing ring and the lock sleeve 7 form dynamic seal through the sealing ring, the central hole of the upper joint 3 is formed by sequentially connecting a first cylindrical end face hole, a cylindrical middle hole and a second cylindrical end face hole, the end of the second cylindrical end face hole of the upper joint 3 is connected with the valve body 2, the aperture of the second cylindrical end face hole is larger than that of the cylindrical middle hole, a chamfer is processed at the joint of the second cylindrical end face hole and the cylindrical middle hole to form a piston stop structure, the upper joint 1 and the lower joint 3 have the same structure, a seventh hydraulic cavity g is formed between the upper part of the lock sleeve 7 and the piston 6, an annular seat 4 and a first return spring 5 are sleeved on the piston 6 in the seventh hydraulic cavity g, the first return spring 5 is fixed on the annular seat 4, the annular seat 4 is fixed on the lock sleeve 7, a first radial groove is processed on the valve body 2 outside the seventh hydraulic cavity g to form a sixth hydraulic cavity f with the lock sleeve 7, the valve body 2 at the downstream of the sixth hydraulic cavity f is axially and sequentially provided with a second radial groove and a lock sleeve 7 to form a fifth hydraulic cavity e, a third radial groove and the lock sleeve 7 to form a fourth hydraulic cavity d, a fourth radial groove and the lock sleeve 7 to form a second hydraulic cavity b, a fifth radial groove and a piston 6 to form a third hydraulic cavity c are arranged on the lock sleeve 7 at the inner side of the fourth hydraulic cavity d, a first hydraulic cavity a is formed between the piston 6 and the valve body 2 at the axially lower part of the lock sleeve 7, a second return spring 8 is sleeved on the piston 6 in the first hydraulic cavity a, a lock sleeve stop structure of the valve body 2 is arranged in the first hydraulic cavity a, exhaust holes respectively communicated with the second hydraulic cavity b, the fourth hydraulic cavity d, the fifth hydraulic cavity e and the sixth hydraulic cavity f are formed in the outer side wall of the valve body 2, and sealing plugs 9 are arranged on the exhaust holes.
An axial first hydraulic channel 22, a second hydraulic channel 21 and a third hydraulic channel 23 are formed in the inner circumferential direction of the side wall of the valve body 2 and are used for loading low-pressure or high-pressure identification liquid, a fourth hydraulic channel 24 and a fifth hydraulic channel 25 are formed in the inner axial direction of the side wall of the lower end of the valve body 2, the fourth hydraulic channel 24 is used for being communicated with an opening hydraulic channel of a flow control valve, the fifth hydraulic channel 25 is used for being communicated with a closing hydraulic channel of the flow control valve, and a pipeline groove is axially formed in the outer side wall of the valve body 2.
The first hydraulic channel 22 communicates with a fifth hydraulic chamber e through a first radial channel 221 on the side wall of the valve body 2, and the fifth hydraulic chamber e communicates with a seventh hydraulic chamber g through a second radial channel 71 on the side wall of the lock sleeve 7; the second hydraulic passage 21 communicates with the fourth hydraulic chamber d through a third radial passage 221 on the side wall of the valve body 2; the third hydraulic passage 23 communicates with the first hydraulic chamber a through a fourth radial passage 231 on the side wall of the valve body 2; the fourth hydraulic passage 24 communicates with the sixth hydraulic chamber f through a fifth radial passage 241 in the side wall of the valve body 2; the fifth hydraulic passage 25 communicates with the second hydraulic chamber b through a sixth radial passage 251 in the side wall of the valve body 2.
The working principle of the invention is as follows:
the first hydraulic channel 22 is loaded with low pressure hydraulic power and the second hydraulic channel 21 is loaded with high pressure hydraulic power as the unique identification hydraulic signal of the hydraulic communication of the present invention.
The hydraulic communication process of the invention is as follows: the low-pressure hydraulic force enters the first hydraulic passage 22, the first radial passage 221 enters the fifth hydraulic chamber e, then the second radial passage 71 on the side wall of the lock sleeve 7 enters the seventh hydraulic chamber g, the piston 6 moves downwards under the action of the low-pressure hydraulic force to drive the lock sleeve 7 to move downwards, the second return spring 8 is compressed, hydraulic oil in the first hydraulic chamber a enters the third hydraulic passage 23 through the fourth radial passage 231 on the side wall of the valve body 2, when the lower end of the piston 6 abuts against a piston stop structure in the lower joint 3, the piston 6 and the lock sleeve 7 stop moving, the second return spring 8 completes one-stage compression, a sealing ring which is arranged on the lock sleeve 7 and is positioned between the first radial groove and the second radial groove of the valve body 2 moves into the second radial groove of the valve body 2 to form critical sealing, the second radial groove of the valve body 2 is separated from the second radial passage 71 on the lock sleeve 7, the hydraulic oil stops entering the seventh hydraulic chamber g, and the piston 6 stops moving. The high-pressure hydraulic power enters the second hydraulic channel 21 to be communicated, the hydraulic oil in the fourth hydraulic channel d enters the fourth hydraulic channel d through the third radial channel 221, the hydraulic oil in the fourth hydraulic channel d enters the third hydraulic channel c through the seventh radial channel 72 on the side wall of the lock sleeve 7, the piston 6 moves upwards under the action of the high-pressure hydraulic power, the hydraulic oil in the seventh hydraulic channel g sequentially passes through the second radial channel 71, the fifth hydraulic channel e and the first radial channel 221 to be extruded into the first hydraulic channel 22, the first return spring 5 is compressed, a sealing ring arranged on the piston 6 and positioned at the downstream of the first radial channel 221 moves to the second radial channel 71 on the lock sleeve 7 to form critical seal, the hydraulic oil in the seventh hydraulic channel g cannot be extruded into the first hydraulic channel 22, the high-pressure hydraulic power input by the second hydraulic channel 21 continuously pushes the piston 6 to move upwards, the lock sleeve 7 moves downwards under the pushing of the hydraulic oil in the first hydraulic channel, the first return spring 5 and the second return spring 8 continuously are compressed, when the lower end surface of the lock sleeve 7 abuts against a lock sleeve stop structure of the valve body 2, the piston 6 stops moving with the lock sleeve 7, the first return spring 5 and the second return spring 8 stops moving, the fourth hydraulic channel 25 f is in communication with the fourth hydraulic channel 25, the fourth hydraulic channel 25 f and the fourth hydraulic channel 25 is completed, the fourth hydraulic channel is in the radial channel 8 is in the communication with the fourth radial channel 8, and the fourth hydraulic channel 8 is in the fourth radial channel 25, and the fourth hydraulic channel 8 is in the fourth radial channel, and the fourth radial channel 8 is in the fourth radial channel is continuously compressed.
Hydraulic disconnection process: the hydraulic oil in the third hydraulic cavity c flows back into the second hydraulic cavity 21 through the seventh radial channel 72, the fourth hydraulic cavity d and the third radial channel 221, the hydraulic oil in the third hydraulic cavity 23 flows back into the first hydraulic cavity a through the fourth radial channel 231, at the moment, the second return spring 8 is in a first-stage compression state, the low-pressure hydraulic input by the first hydraulic channel 22 is canceled, the lock sleeve 7 is restored to the initial position under the action of the elasticity of the second return spring 8, the hydraulic oil in the third hydraulic cavity 23 continuously flows back into the first hydraulic cavity a through the fourth radial channel 231, and the hydraulic oil in the seventh hydraulic cavity g flows back into the first hydraulic channel 22 through the first radial channel 221, so that the hydraulic breaking process is completed.
Claims (7)
1. An intelligent well completion underground digital hydraulic communication controller is characterized in that: one end of the valve body (2) is provided with an upper joint (1), the other end is provided with a lower joint (3), a piston (6) is arranged in the valve body (2), two ends of the piston (6) respectively extend into the upper joint (1) and the lower joint (3), piston stop structures are arranged in the upper joint (1) and the lower joint (3), a lock sleeve (7) is arranged between the piston (6) and the valve body (2), a seventh hydraulic cavity (g) is formed between the upper part of the lock sleeve (7) and the piston (6), a first reset elastic structure body is sleeved on the piston (6) in the seventh hydraulic cavity (g), a first radial groove and a lock sleeve (7) are sequentially processed on the valve body (2) at the outer side of the seventh hydraulic cavity (g) to form a sixth hydraulic cavity (f), a second radial groove and the lock sleeve (7) to form a fifth hydraulic cavity (e), a third radial groove and the lock sleeve (7) to form a fourth hydraulic cavity (d), a fourth radial groove and the lock sleeve (7) to form a second hydraulic cavity (b), a fifth radial groove and a piston (6) are processed on the lock sleeve (7) at the inner side of the fourth hydraulic cavity (d) to form a third hydraulic cavity (c), a first hydraulic cavity (a) is formed between the piston (6) and the valve body (2) at the axial lower part of the lock sleeve (7), a lock sleeve stop structure is arranged on the valve body (2) in the first hydraulic cavity (a), and a second reset elastic structure is sleeved on the piston (6);
an axial first hydraulic channel (22), an axial second hydraulic channel (21) and an axial third hydraulic channel (23) are formed in the inner circumferential direction of the side wall of the valve body (2), and a fourth hydraulic channel (24) and a fifth hydraulic channel (25) are formed in the side wall of the lower end of the valve body (2) in an axial mode;
the first hydraulic channel (22) is communicated with a fifth hydraulic cavity (e) through a first radial channel (221) on the side wall of the valve body (2), and the fifth hydraulic cavity (e) is communicated with a seventh hydraulic cavity (g) through a second radial channel (71) on the side wall of the lock sleeve (7);
the second hydraulic channel (21) is communicated with a fourth hydraulic cavity (d) through a third radial channel (221) on the side wall of the valve body (2), and the fourth hydraulic cavity (d) is communicated with a third hydraulic cavity (c) through a seventh radial channel (72) on the side wall of the lock sleeve (7);
the third hydraulic passage (23) is communicated with the first hydraulic cavity (a) through a fourth radial passage (231) on the side wall of the valve body (2);
the fourth hydraulic passage (24) is communicated with the sixth hydraulic chamber (f) through a fifth radial passage (241) on the side wall of the valve body (2);
the fifth hydraulic passage (25) is communicated with the second hydraulic cavity (b) through a sixth radial passage (251) on the side wall of the valve body (2);
the central hole of the valve body (2) is formed by sequentially connecting a first cylindrical hole, a second cylindrical hole and a third cylindrical hole from top to bottom, the diameter of the first cylindrical hole is larger than that of the second cylindrical hole, and a chamfer is processed at the joint of the first cylindrical hole and the second cylindrical hole to form a lock sleeve stop structure;
the central hole of the lower joint (3) is formed by sequentially connecting a first cylindrical end face hole, a cylindrical middle hole and a second cylindrical end face hole, the end of the lower joint (3) where the second cylindrical end face hole is located is connected with the valve body (2), the aperture of the second cylindrical end face hole is larger than that of the cylindrical middle hole, and a chamfer is processed at the joint of the second cylindrical end face hole and the cylindrical middle hole to form a piston stop structure; the upper joint (1) and the lower joint (3) have the same structure.
2. The intelligent completion downhole digital fluid communication controller according to claim 1, wherein: the upper joint (1) and the valve body (2) form static seal through a sealing ring, the piston (6) and the upper joint (1) form dynamic seal through a sealing ring, the piston and the lower joint (3) form dynamic seal through a sealing ring, the piston and the lower joint form dynamic seal with a lock sleeve (7) through a sealing ring, and the lock sleeve (7) and the valve body (2) form dynamic seal through a sealing ring.
3. The intelligent well completion downhole digital fluid communication controller according to claim 1, wherein the first return elastic structure is an annular seat provided with a spring.
4. The intelligent completion downhole digital fluid communication controller according to claim 1, wherein the second return resilient structure is a spring.
5. The intelligent well completion underground digital hydraulic communication controller according to claim 1, wherein radial pins are arranged at the joints of the valve body (2) and the upper joint (1) and the lower joint (3).
6. The intelligent well completion underground digital hydraulic communication controller according to claim 1, wherein exhaust holes which are respectively communicated with the second hydraulic cavity (b), the fourth hydraulic cavity (d), the fifth hydraulic cavity (e) and the sixth hydraulic cavity (f) are formed in the outer side wall of the valve body (2), and sealing plugs (9) are arranged on the exhaust holes.
7. The intelligent well completion downhole digital hydraulic communication controller according to claim 1, wherein the outer side wall of the valve body (2) is axially provided with a pipeline groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210489851.1A CN114704224B (en) | 2022-05-07 | 2022-05-07 | Intelligent well completion underground digital hydraulic communication controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210489851.1A CN114704224B (en) | 2022-05-07 | 2022-05-07 | Intelligent well completion underground digital hydraulic communication controller |
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| Publication Number | Publication Date |
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| CN114704224A CN114704224A (en) | 2022-07-05 |
| CN114704224B true CN114704224B (en) | 2023-05-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386146B (en) * | 2018-04-27 | 2024-01-26 | 中国石油大学(北京) | Casing head and annulus sealing device running tool for deep water drilling and use method thereof |
| CN210918981U (en) * | 2019-09-04 | 2020-07-03 | 中国石油化工股份有限公司 | Novel underground agent injection valve |
| CN114439398B (en) * | 2020-10-19 | 2024-03-22 | 中国石油化工股份有限公司 | Underground hydraulic control pressure distribution device for oil-water well |
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