CN114704224A - Intelligent well completion underground digital hydraulic communication controller - Google Patents
Intelligent well completion underground digital hydraulic communication controller Download PDFInfo
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- CN114704224A CN114704224A CN202210489851.1A CN202210489851A CN114704224A CN 114704224 A CN114704224 A CN 114704224A CN 202210489851 A CN202210489851 A CN 202210489851A CN 114704224 A CN114704224 A CN 114704224A
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- 230000006854 communication Effects 0.000 title claims abstract description 19
- 238000004891 communication Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 26
- 230000003068 static effect Effects 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
An intelligent well completion downhole digital hydraulic communication controller, wherein 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, a piston is arranged in the valve body, two ends of the piston respectively extend into the upper joint and the lower joint, 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 second hydraulic cavity, a fifth radial groove and the piston are processed on the lock sleeve on the inner side of the fourth hydraulic cavity to form a third hydraulic cavity, and a first hydraulic cavity is formed between the piston and the valve body under the lock sleeve shaft, a lock sleeve stop structure is arranged on the valve body in the first hydraulic cavity, and a second reset elastic structure body is sleeved on the piston.
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 domestic intelligent well completion technology is developed for many years and widely applied to more than ten oil fields and nearly thousand oil-water wells in China. The key core technology for realizing underground fluid control is that a hydraulic sliding sleeve of a hydraulic control type intelligent well completion system underground flow control valve is reversed to move to open and close each stage of valve hole.
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 oil inlet hydraulic pipelines which are opened and 1 oil return hydraulic pipeline which is closed in a public mode, the number of hydraulic pipelines which can be put into the well is limited due to limited underground space, so that the number of the controlled production intervals is limited, at present, the domestic 3+1 mode is usually adopted to control the production of three underground production intervals, and the mode is difficult to be used in a small well hole and control more production intervals. The domestic and foreign hydraulic control type intelligent well completion system uses the connection of the underground hydraulic decoder and the flow control valve to realize that three hydraulic pipelines control the production of six production intervals, thereby further reducing the number of hydraulic control pipelines. The hydraulic decoder in the well recognizes hydraulic signals and controls through high and low pressure hydraulic signal sequencing of three hydraulic pipelines, so as to realize flow regulation and control of the flow control valve in the well. A complex hydraulic reversing pipeline is built in a cavity between a central pipe and a protection barrel by bridging a plurality of single-phase valves and hydraulic pipelines in a domestic test I-type underground hydraulic decoder, the whole pipeline structure is complex and high in manufacturing difficulty, and the structure is difficult to use in a small borehole due to the limitation of the sizes of the single-phase valves and sealing joints. A single lock sleeve locking mechanism is adopted in a domestic test II type underground hydraulic decoder, the inner wall of a lock sleeve blocks a locking ball to move radially, and the locking ball is clamped in a clamping groove in a valve core to lock the valve core. When the lock sleeve moves under the action of low-pressure unlocking liquid force, an unlocking groove on the lock sleeve moves to the central position of the locking ball, the valve core moves under the action of high-pressure pushing liquid force, the locking ball radially moves under the pushing action of the valve core and enters the unlocking groove on the lock sleeve to complete unlocking, the high-low pressure hydraulic channel is communicated with the opening and closing hydraulic channels of the flow control valve respectively, and the valve core and the lock sleeve reset to the initial position under the elasticity of respective springs after the high-low pressure hydraulic channel is unloaded; when the actual hydraulic loading of the high-pressure hydraulic channel and the low-pressure hydraulic channel is opposite, namely the lock sleeve is pushed by high pressure greater than unlocking hydraulic to push the unlocking groove on the lock sleeve to move beyond the central 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, and the unlocking can be completed only when a hydraulic decoder is subjected to a correct hydraulic sequence. Such a hydraulic decoder has the following problems: firstly, due to pressure loss on a long underground 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 an underground hydraulic decoder, so that an unlocking groove on a lock sleeve does not move to the central position of a locking ball, the locking ball is still clamped in a clamping groove on a valve core to lock the valve core, the unlocking is invalid, and the valve core cannot move under the high-pressure pushing hydraulic force; when the hydraulic force loaded by the wellhead is greater than the unlocking hydraulic force, the actual hydraulic force is greater than the unlocking hydraulic force after being transmitted to the downhole hydraulic decoder through the downhole long hydraulic pipeline, so that the unlocking groove on the lock sleeve moves to exceed the central position of the locking ball, the locking ball is still clamped in the clamping groove on the valve core to lock the valve core, so that unlocking failure is caused, the valve core cannot move under high-pressure pushing hydraulic force, and unlocking failure is extremely likely to be caused by ground hydraulic operation error, therefore, the unlocking groove on the lock sleeve can be ensured to move to the central position of the locking ball only by accurately loading a low-pressure unlocking hydraulic force value on the wellhead by a single lock sleeve structure, the ground hydraulic operation difficulty is higher, secondly, the unlocking hydraulic channel of the lock sleeve is connected with the opening or closing hydraulic channel of the flow control valve, the unlocking hydraulic force of the flow control valve is far greater than that of the hydraulic lock sleeve, and the lock sleeve cannot effectively protect a lock sleeve spring without a positioning structure, the locking sleeve moves under the action of hydraulic force for opening or closing the flow control valve to directly compress a locking sleeve spring to the bottom, the locking sleeve spring is subjected to excessive fatigue and easy to elastically lose efficacy after repeated compression for many times, so that the locking sleeve can not reset to the initial position to cause the locking failure of the valve core, the underground hydraulic decoder loses the effect of identifying a hydraulic signal, thirdly, the locking sleeve spring needs to be repeatedly subjected to secondary compression in the process of identifying the hydraulic signal, the locking sleeve spring is extremely easy to fatigue and lose efficacy to cause the locking failure of the valve core in the process of long-term underground working, fourthly, the procedure of ground hydraulic operation is increased by adopting an additional hydraulic pipeline pressing mode to assist the resetting initial position of the locking sleeve, and the reliability of the overall working of the underground hydraulic decoder is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an intelligent well completion underground digital hydraulic communication controller which is reasonable in total, compact in structure, safe and reliable and reduces ground hydraulic operation procedures.
The technical scheme for solving the technical problems is as follows: an intelligent well-completion underground digital hydraulic communication controller is characterized in that an upper connector is arranged at one end of a valve body, a lower connector is arranged at the other end of the valve body, a piston is arranged in the valve body, two ends of the piston respectively extend into the upper connector and the lower connector, piston stop structures are arranged in the upper connector and the lower connector, a lock sleeve is arranged between the piston and the valve body, a seventh hydraulic cavity is formed between the upper part of the lock sleeve and the piston, a first elastic reset structure body is sleeved on the piston in the seventh hydraulic cavity, a first radial groove and the lock sleeve are sequentially processed on the valve body outside the seventh hydraulic cavity to form a sixth hydraulic cavity, a fifth hydraulic cavity is formed by the second radial groove and the lock sleeve, a fourth hydraulic cavity is formed by the third radial groove and the lock sleeve, a fifth radial groove and the piston are processed on the lock sleeve on the inner side of the fourth hydraulic cavity to form a third hydraulic cavity, a first hydraulic cavity is formed between the piston and the valve body below a lock sleeve shaft, a valve body in the first hydraulic cavity is provided with a lock sleeve stop structure, and a piston is sleeved with a second reset elastic structure body;
a first hydraulic channel, a second hydraulic channel and a third hydraulic channel which are axially arranged in the circumferential direction of the side wall of the valve body are machined, and a fourth hydraulic channel and a 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 the fifth hydraulic cavity through a first radial channel on the side wall of the valve body, and the fifth hydraulic cavity is communicated with the 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 channel is communicated with the sixth hydraulic cavity through a fifth radial channel on the side wall of the valve body;
and the fifth hydraulic channel is communicated with the second hydraulic cavity through a sixth radial channel on the side wall of the valve body.
As a preferred technical scheme, the center 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 structure of the lock sleeve.
As a preferred technical scheme, a central hole of the lower joint is formed by sequentially connecting a first cylindrical end surface hole, a cylindrical middle hole and a second cylindrical end surface hole, the end of the lower joint where the second cylindrical end surface hole is located is connected with the valve body, the aperture of the second cylindrical end surface hole is larger than that of the cylindrical middle hole, and a chamfer is processed at the joint of the second cylindrical end surface hole and the cylindrical middle hole to form a piston stop structure; the upper joint and the lower joint have the same structure.
As a preferred technical scheme, the top connection passes through the sealing washer with the valve body and constitutes static seal, piston and top connection pass through the sealing washer and constitute dynamic seal, pass through the sealing washer with the lower clutch and constitute dynamic seal, pass through the sealing washer with the lock sleeve and constitute dynamic seal, the lock sleeve passes through the sealing washer with the valve body and constitutes dynamic seal.
As a preferable technical solution, the first elastic return structure is an annular seat on which a spring is arranged.
Preferably, the second return elastic structure is a spring.
As a preferable technical scheme, radial pins are arranged at the joints of the valve body and the upper joint and the lower joint.
As a preferred technical scheme, the outer side wall of the valve body is provided with exhaust holes which are respectively communicated with the second hydraulic cavity, the fourth hydraulic cavity, the fifth hydraulic cavity and the sixth hydraulic cavity, and the exhaust holes are provided with sealing plugs.
As a preferred technical scheme, the side wall of the valve body is axially provided with a pipeline groove.
The invention has the following beneficial effects:
the hydraulic linkage novel locking mechanism consisting of the piston and the lock sleeve is adopted, a steel ball locking mechanism with a complex structure is removed, and the reliability of identifying hydraulic signals is improved; the invention reduces the multi-position dynamic sealing structure in the prior art to the two-position dynamic sealing structure, the whole structure is only composed of nine simple structure parts, the whole structure reduces more than half of the parts, the whole length is also reduced 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 share the load, so that the springs are prevented from being fatigued, and hydraulic force is not required to be provided by an additional hydraulic pipeline for auxiliary reset, the ground hydraulic operation procedure is simplified, and the working reliability of the whole tool is enhanced; the whole body 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 the well bores of all sizes; the valve body has a simple internal structure, and reduces the machining difficulty.
Drawings
FIG. 1 is a schematic diagram 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 sectional view a-a of fig. 2.
Fig. 5 is a sectional view B-B of fig. 3.
Fig. 6 is a cross-sectional view C-C of fig. 3.
Fig. 7 is a cross-sectional view taken along line D-D 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; sealing the plug 9; the second hydraulic passage 21; a first hydraulic passage 22; a third hydraulic channel 23; a fourth hydraulic path 24; a fifth hydraulic channel 25; a first radial channel 221; a second radial passage 71; a third radial channel 221; a fourth radial passage 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 below with reference to the drawings and examples, but the present invention is not limited to the embodiments described below.
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; and the sealing plugs 9 are 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 locking structure, an upper joint 1 and a lock sleeve 7 are installed in the first cylindrical hole of the valve body 2, a lower joint 3 is installed on the third cylindrical hole, radial pins are installed at the joints of the valve body 2 and the upper joint 1 and the lower joint 3 to prevent the valve body 2 from rotating circumferentially, the upper joint 1 and the valve body 2 form static seal through sealing rings, the lock sleeve 7 and the valve body 2 form dynamic seal through sealing rings, a piston 6 is installed 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 forms dynamic seal with the upper joint 1 through sealing rings and forms dynamic seal with the lower joint 3 through sealing rings, The upper connector 3 is formed by sequentially connecting a first cylindrical end surface hole, a cylindrical middle hole and a second cylindrical end surface hole, the end of the upper connector 3 where the second cylindrical end surface hole is located is connected with the valve body 2, the aperture of the second cylindrical end surface hole is larger than that of the cylindrical middle hole, a chamfer is machined at the joint of the second cylindrical end surface hole and the cylindrical middle hole to form a piston locking structure, the upper connector 1 and the lower connector 3 are identical in 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 reset spring 5 are sleeved on the piston 6 in the seventh hydraulic cavity g, the first reset spring 5 is fixed on the annular seat 4, the annular seat 4 is fixed on the lock sleeve 7, a first radial groove and the lock sleeve 7 are machined on the valve body 2 outside the seventh hydraulic cavity g to form a sixth hydraulic cavity f, a second radial groove and the lock sleeve 7 are sequentially machined on the downstream valve body 2 of the sixth hydraulic cavity f to form a fifth hydraulic cavity e The third radial groove and the lock sleeve 7 form a fourth hydraulic cavity d, the fourth radial groove and the lock sleeve 7 form a second hydraulic cavity b, a fifth radial groove and the piston 6 form a third hydraulic cavity c are machined on the lock sleeve 7 on the inner side of the fourth hydraulic cavity d, the lock sleeve 7 is positioned axially below the piston 6 and the valve body 2 to form a first hydraulic cavity a, a second reset spring 8 is sleeved on the piston 6 in the first hydraulic cavity a, a lock sleeve locking structure of the valve body 2 is positioned in the first hydraulic cavity a, exhaust holes communicated with the second hydraulic cavity b, the fourth hydraulic cavity d, the fifth hydraulic cavity e and the sixth hydraulic cavity f are machined on 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 used for loading low-pressure or high-pressure identification liquid, a fourth hydraulic channel 24 and a fifth hydraulic channel 25 are axially formed in the side wall of the lower end of the valve body 2, the fourth hydraulic channel 24 is used for being communicated with a hydraulic channel for opening the flow control valve, the fifth hydraulic channel 25 is used for being communicated with a hydraulic channel for closing 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 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 passage 21 communicates with the fourth hydraulic chamber d through a third radial passage 221 formed in 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 in 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 passage 22 is charged with low pressure hydraulic and the second hydraulic passage 21 is charged with high pressure hydraulic as the unique identification hydraulic signal for hydraulic communication in the present invention.
The hydraulic communication process of the invention is as follows: low-pressure hydraulic enters the first hydraulic channel 22, enters the fifth hydraulic chamber e through the first radial channel 221, then enters the seventh hydraulic chamber g through the second radial channel 71 on the side wall of the lock sleeve 7, the piston 6 moves downwards under the action of the low-pressure hydraulic force to drive the lock sleeve 7 to move downwards, so that the second return spring 8 is compressed, hydraulic oil in the first hydraulic chamber a enters the third hydraulic channel 23 through the fourth radial channel 231 on the side wall of the valve body 2, when the lower end of the piston 6 abuts against a piston stopping structure in the lower connector 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, and the second radial groove of the valve body 2 is sealed from the second radial channel 71 on the lock sleeve 7, the hydraulic oil stops entering the seventh hydraulic chamber g and the piston 6 stops moving. High-pressure hydraulic power enters the second hydraulic channel 21 and enters the fourth hydraulic cavity d through the third radial channel 221, hydraulic oil in the fourth hydraulic cavity d enters the third hydraulic cavity 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 and pushes the hydraulic oil in the seventh hydraulic cavity g into the first hydraulic channel 22 through the second radial channel 71, the fifth hydraulic cavity e and the first radial channel 221 in sequence, 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 onto the second radial channel 71 on the lock sleeve 7 to form critical sealing, the hydraulic oil in the seventh hydraulic cavity g cannot be pushed into the first hydraulic channel 22, the high-pressure hydraulic power input from 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 cavity, the first return spring 5 and the second return spring 8 continue to be 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 and the lock sleeve 7 stop moving, the first return spring 5 and the second return spring 8 stop compressing, at the moment, the first hydraulic channel 22 is communicated with the fourth hydraulic channel 24 through the first radial channel 221, the fifth hydraulic cavity e and the sixth hydraulic cavity f, the second hydraulic channel 21 is communicated with the fifth hydraulic channel 25 through the third radial channel 221, the fourth hydraulic cavity d and the second hydraulic cavity b, and hydraulic communication is completed.
And (3) hydraulic disconnection process: unloading the hydraulic oil to the second hydraulic channel 21, recovering the lower end of the piston 6 to abut against a piston stop structure in the lower joint 3 under the elastic force action of the first return spring 5 and the second return spring 8 by the input high-pressure hydraulic force, returning the hydraulic oil in the third hydraulic cavity c to the second hydraulic channel 21 through the seventh radial channel 72, the fourth hydraulic cavity d and the third radial channel 221, returning the hydraulic oil in the third hydraulic channel 23 to the first hydraulic cavity a through the fourth radial channel 231, wherein the second return spring 8 is in a one-stage compression state, canceling the low-pressure hydraulic force input by the first hydraulic channel 22, recovering the locking sleeve 7 to the initial position under the elastic force action of the second return spring 8, continuously returning the hydraulic oil in the third hydraulic channel 23 to the first hydraulic cavity a through the fourth radial channel 231, and returning the hydraulic oil in the seventh hydraulic cavity g to the first hydraulic channel 22 through the first radial channel 221, the hydraulic disconnection process is completed.
Claims (9)
1. An intelligent well completion downhole digital hydraulic communication controller is characterized in that: an upper connector (1) is arranged at one end of a valve body (2), a lower connector (3) is arranged at the other end of the valve body, a piston (6) is arranged in the valve body (2), two ends of the piston (6) respectively extend into the upper connector (1) and the lower connector (3), piston locking structures are arranged in the upper connector (1) and the lower connector (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 the 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), and a fourth hydraulic cavity (d) is formed by the third radial groove and the lock sleeve (7), A second hydraulic cavity (b) is formed by the fourth radial groove and the lock sleeve (7), a fifth radial groove is processed on the lock sleeve (7) positioned on the inner side of the fourth hydraulic cavity (d) to form a third hydraulic cavity (c) with the piston (6), a first hydraulic cavity (a) is formed between the piston (6) and the valve body (2) and axially below the lock sleeve (7), a lock sleeve locking structure is arranged on the valve body (2) in the first hydraulic cavity (a), and a second reset elastic structure body is sleeved on the piston (6);
an axial first hydraulic channel (22), a second hydraulic channel (21) and a third hydraulic channel (23) are machined 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 machined in the side wall of the lower end of the valve body (2) in the axial direction;
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 channel (23) is communicated with the first hydraulic cavity (a) through a fourth radial channel (231) on the side wall of the valve body (2);
the fourth hydraulic channel (24) is communicated with the sixth hydraulic cavity (f) through a fifth radial channel (241) on the side wall of the valve body (2);
the fifth hydraulic channel (25) is communicated with the second hydraulic cavity (b) through a sixth radial channel (251) on the side wall of the valve body (2).
2. The intelligent well completion downhole digital hydraulic communication controller according to claim 1, wherein: the centre bore from the top down of valve body (2) is by first cylindrical hole, second cylindrical hole, the constitution of linking to each other in proper order in third cylindrical hole, the diameter in first cylindrical hole is greater than the diameter in second cylindrical hole, first cylindrical hole has the chamfer to lock sleeve locking structure with second cylindrical hole junction processing.
3. An intelligent completion downhole digital hydraulic communication controller according to claim 1 or 2, wherein: the center hole of the lower joint (3) is formed by sequentially connecting a first cylindrical end surface hole, a cylindrical middle hole and a second cylindrical end surface hole, the end of the lower joint (3) where the second cylindrical end surface hole is located is connected with the valve body (2), the aperture of the second cylindrical end surface hole is larger than that of the cylindrical middle hole, and a chamfer is processed at the connection position of the second cylindrical end surface hole and the cylindrical middle hole to form a piston stop structure; the upper joint (1) and the lower joint (3) are identical in structure.
4. The intelligent completion downhole digital hydraulic communication controller of 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 the sealing ring, form dynamic seal with the lower joint (3) through the sealing ring, and form dynamic seal with the lock sleeve (7) through the sealing ring, and the lock sleeve (7) and the valve body (2) form dynamic seal through the sealing ring.
5. An intelligent well completion downhole digital hydraulic communication controller according to claim 1, wherein the first return elastic structure is an annular seat with a spring disposed thereon.
6. The intelligent well-completion downhole digital hydraulic communication controller according to claim 1, wherein the second reset resilient structure is a spring.
7. An intelligent well completion downhole 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).
8. An intelligent well completion downhole digital hydraulic communication controller according to claim 1, wherein 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 processed on the outer side wall of the valve body (2), and sealing plugs (9) are arranged on the exhaust holes.
9. An 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 |
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| 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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| CN114704224A true CN114704224A (en) | 2022-07-05 |
| CN114704224B CN114704224B (en) | 2023-05-09 |
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| CN202210489851.1A Active CN114704224B (en) | 2022-05-07 | 2022-05-07 | Intelligent well completion underground digital hydraulic communication controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019205479A1 (en) * | 2018-04-27 | 2019-10-31 | 中国石油大学(北京) | Casing head and annulus sealing device running tool for deepwater drilling, and method for using same |
| 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 |
| CN114439398A (en) * | 2020-10-19 | 2022-05-06 | 中国石油化工股份有限公司 | Underground hydraulic control pressure distribution device for oil-water well |
-
2022
- 2022-05-07 CN CN202210489851.1A patent/CN114704224B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019205479A1 (en) * | 2018-04-27 | 2019-10-31 | 中国石油大学(北京) | Casing head and annulus sealing device running tool for deepwater drilling, and method for using same |
| 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 |
| CN114439398A (en) * | 2020-10-19 | 2022-05-06 | 中国石油化工股份有限公司 | Underground hydraulic control pressure distribution device for oil-water well |
Non-Patent Citations (1)
| Title |
|---|
| 廖成龙;黄鹏;李明;沈泽俊;张卫平;钱杰;张国文;: "智能完井用井下液控多级流量控制阀研究" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114704224B (en) | 2023-05-09 |
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