CN107288580B - Remote control sleeve sliding sleeve based on potential difference communication - Google Patents
Remote control sleeve sliding sleeve based on potential difference communication Download PDFInfo
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- CN107288580B CN107288580B CN201710664747.0A CN201710664747A CN107288580B CN 107288580 B CN107288580 B CN 107288580B CN 201710664747 A CN201710664747 A CN 201710664747A CN 107288580 B CN107288580 B CN 107288580B
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- 238000004891 communication Methods 0.000 title claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 32
- 210000002445 nipple Anatomy 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 34
- 238000009434 installation Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 5
- 239000004636 vulcanized rubber Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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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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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The application discloses a remote control sleeve sliding sleeve based on potential difference communication, which comprises an insulating sleeve joint, an electrical nipple, a sliding sleeve nipple and a sleeve joint which are connected in sequence; the sliding sleeve nipple comprises a sliding sleeve outer cylinder, a sliding sleeve and a sliding sleeve inner cylinder, wherein the sliding sleeve inner cylinder is arranged on the inner side of the sliding sleeve outer cylinder, a hydraulic channel chamber is formed between the sliding sleeve outer cylinder and the sliding sleeve inner cylinder, and the sliding sleeve is arranged in the hydraulic channel chamber; the sliding sleeve outer cylinder is provided with a first fracturing fluid channel hole, the sliding sleeve inner cylinder is provided with a third fracturing fluid channel hole, and the positions of the first fracturing fluid channel hole and the third fracturing fluid channel hole are opposite; the position of the sliding sleeve inner barrel, which is close to the electrical short section, is provided with a two-position two-way electromagnetic valve, and the electromagnetic valve liquid flow inlet of the two-position two-way electromagnetic valve faces the inner side of the sliding sleeve inner barrel. The application does not need to transmit signals underground by means of hardware devices such as cables, optical fibers, relays and the like, thereby greatly saving underground data communication cost and reducing the labor intensity of field operation.
Description
Technical Field
The application relates to an oil and gas well casing sliding sleeve, in particular to a remote control casing sliding sleeve based on potential difference communication.
Background
With the deep exploration and development, shale gas and tight gas reservoirs enter a scale development stage, and large-scale fracturing modes such as horizontal well staged fracturing and volume fracturing become the main technology of oil and gas field development, and the existing staged fracturing technology mainly comprises the following steps: open hole packer-sliding sleeve staged fracturing technology, drillable bridge plug staged fracturing technology, large-diameter bridge plug staged fracturing technology, double-seal single-pressure staged fracturing technology and hydraulic jet staged fracturing technology, but all have great limitations: bridge plugs and packers used for packing in the traditional fracturing technology make the construction process complicated and complicated, the fracturing equipment and the bridge plugs are cycled to go into and out of the well, and the packer is carried to the position of a reservoir by frequently lifting a tubular column, so that the construction risk and cost are increased.
In the prior art of intelligent sleeve sliding sleeve, chinese patent CN202125290U discloses an intelligent sliding sleeve in a selective switch sliding sleeve assembly, and the intelligent sliding sleeve is opened and closed by utilizing a special switch tool. The scheme needs to operate by using a coiled tubing with a switch tool, is complex to operate and has long construction period.
The patent CN203452763U is an intelligent sliding sleeve for infinite stage separation reconstruction of a horizontal well, and the intelligent sliding sleeve is opened and closed by utilizing a piston to control self-generation of a ball seat. The scheme still needs to be completed through ball throwing, and the full drift diameter of a shaft and the reciprocating opening of the sliding sleeve cannot be realized.
Patent CN203891841U, "a surface controlled downhole sliding sleeve for staged fracturing acidizing modification of horizontal wells," utilizes the opening and closing of the sliding sleeve by wireless waves. The scheme is mainly applied to the field of conventional natural gas, tools are installed on oil pipes, packer packing production layers are needed, and the intelligent multi-production-layer segmentation process of the horizontal section of the oil-gas well cannot be realized.
In summary, the sliding sleeve opening mode of the existing fracturing technology mainly comprises the following steps: ball throwing setting, continuous pipe opening type, hydraulic control type, electric control type and electrohydraulic control type. The realization of the mode often needs to establish a control channel between a ground wellhead and an underground sliding sleeve, realizes ground and underground communication, and finally completes the transportation of pressure transmission media such as electric power, hydraulic power and the like or opening and closing devices such as continuous pipes, spheres and the like. With the increase of the level segment stage number and the working distance, the construction of the ground and the underground passage is more difficult to ensure. Therefore, the above problems will extend the working cycle to some extent, increasing the working cost.
Disclosure of Invention
The application aims to solve the technical problems that the existing device needs to frequently lift a pipe column to carry a packer to a reservoir position, thereby increasing construction risk and cost, and aims to provide a remote control sleeve sliding sleeve based on potential difference communication, thereby reducing completion cost; the packer is prevented from being carried to the reservoir position by frequently lifting the pipe column, and the construction risk is reduced.
The application is realized by the following technical scheme:
a remote control sleeve sliding sleeve based on potential difference communication comprises an insulating sleeve joint, an electrical nipple, a sliding sleeve nipple and a sleeve joint which are connected in sequence; the sliding sleeve nipple comprises a sliding sleeve outer cylinder, a sliding sleeve and a sliding sleeve inner cylinder, wherein the sliding sleeve inner cylinder is arranged on the inner side of the sliding sleeve outer cylinder, a hydraulic channel chamber is formed between the sliding sleeve outer cylinder and the sliding sleeve inner cylinder, and the sliding sleeve is arranged in the hydraulic channel chamber;
the sliding sleeve outer cylinder is provided with a first fracturing fluid channel hole, the sliding sleeve inner cylinder is provided with a third fracturing fluid channel hole, and the positions of the first fracturing fluid channel hole and the third fracturing fluid channel hole are opposite; the middle part of the sliding sleeve is provided with a second fracturing fluid passage hole;
the position, close to the electrical nipple, in the sliding sleeve inner barrel is provided with a two-position two-way electromagnetic valve, and an electromagnetic valve liquid flow inlet of the two-position two-way electromagnetic valve faces the inner side of the sliding sleeve inner barrel.
When the two-position two-way electromagnetic valve is opened, high-pressure liquid in the inner barrel of the sliding sleeve flows through the liquid flow inlet of the electromagnetic valve to reach the hydraulic channel cavity, then the sliding sleeve is pushed, after the sliding sleeve moves to a terminal, the three channel holes of the first fracturing fluid channel hole, the second fracturing fluid channel hole and the third fracturing fluid channel hole are aligned, and at the moment, the underground sleeve sliding sleeve is in an opened state, so that subsequent fracturing or acidizing construction operation can be performed. Thus, the problem that the packer is carried to the position of the reservoir by frequently lifting the pipe column is solved, and the construction risk and cost are reduced.
Further, the electrical short section comprises an electrical inner protection cylinder and an electrical outer protection cylinder, the electrical inner protection cylinder is arranged on the inner side of the electrical outer protection cylinder, and an electrical system installation cavity is formed between the electrical inner protection cylinder and the electrical outer protection cylinder.
Further, a communication circuit board, a battery and a valve control circuit board are arranged in the electric system installation cavity, and the communication circuit board, the battery, the valve control circuit board and the two-position two-way electromagnetic valve are sequentially connected.
An electrical system installation cavity is formed between the electrical inner protection cylinder and the electrical outer protection cylinder, so that the overall management of related hardware of an electrical system is facilitated, and meanwhile, the electrical system is prevented from being damaged; the cable passes through the insulating sleeve joint and enters the electric system installation cavity to be connected to the communication circuit board, and the communication circuit board, the battery, the valve control circuit board and the two-position two-way electromagnetic valve are sequentially connected, so that external control signals are sequentially transmitted to the two-position two-way electromagnetic valve through the cable, the communication circuit board, the battery and the valve control circuit board, and the opening and closing of the two-position two-way electromagnetic valve are controlled.
Further, the insulation sleeve joint is isolated from the electrical short section by the arrangement of insulation vulcanized rubber. The insulating vulcanized rubber isolates the insulating sleeve joint from the electrical short joint, so that the current flowing through the insulating sleeve joint is prevented from directly passing through the electrical short joint and the sliding sleeve short joint to cause false triggering of the two-position two-way electromagnetic valve.
Further, the sliding sleeve outer cylinder fixes the sliding sleeve through the anti-moving pin. The sliding sleeve is fixed by the anti-moving pin, so that the sliding sleeve is prevented from moving in advance in the process of well running and well cementation operation.
Further, the insulation sleeve joint and the electric inner protection cylinder are sealed by a sealing ring; the insulation sleeve joint is connected with the electric outer protection cylinder through threads, and is sealed through a sealing ring.
Further, the electrical nipple and the sliding sleeve nipple are connected through a sliding sleeve joint.
Further, the sliding sleeve joint is connected with the sliding sleeve pup joint through screw threads, and is sealed through a sealing ring.
Further, cable passage holes are formed in the insulating sleeve joint and the sliding sleeve joint.
Further, the sliding sleeve outer cylinder and the sliding sleeve inner cylinder are respectively connected with the sliding sleeve through waterproof mud combined sealing rings.
Compared with the prior art, the application has the following advantages and beneficial effects:
1. the application can realize the underground remote wireless remote control technology in the true sense, does not need to transmit signals to the underground by means of hardware devices such as cables, optical fibers, relays and the like, greatly saves the underground data communication cost and reduces the labor intensity of field operation;
2. compared with wireless signal transmission modes such as hydraulic pulse, sound wave and the like, the application can improve the accuracy and reliability of data transmission and can provide powerful support for efficient management and command of on-site operation;
3. the application can solve the problems of poor well integrity, long time consumption, great influence by sleeve change and the like in the process of improving the yield of part of complex wells.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present application;
FIG. 2 is a schematic view of the structure of the electrical nipple of the present application;
FIG. 3 is a schematic view of a nipple of the present application;
fig. 4 to 6 are schematic views of the structure of the waterproof mud combined sealing ring according to the present application;
fig. 7 is a pipe string installation diagram of the present application.
In the drawings, the reference numerals and corresponding part names:
1-insulating sleeve joint, 16-insulating vulcanized rubber, 17-first cable passage hole, 2-electric inner protection cylinder, 3-electric outer protection cylinder, 4-communication cable, 5-communication circuit board, 6-battery, 7-electromagnetic valve control circuit board, 8-sliding sleeve joint, 81-second cable passage hole, 9-sliding sleeve outer cylinder, 91-first fracturing fluid passage hole, 10-electromagnetic valve control cable, 11-two-position two-way electromagnetic valve, 111-electromagnetic valve fluid inlet, 12-sliding sleeve, 121-second fracturing fluid passage hole, 13-sliding sleeve inner cylinder, 131-third fracturing fluid passage hole, 14-anti-moving pins, 15-sleeve joints, M1-first sealing rings, M2-second sealing rings, DQ 1-electric system installation cavities, M3-third sealing rings, M4-fourth sealing rings, M5-fifth sealing rings, YQ 1-hydraulic channel cavities, M6-sixth sealing rings, M8-waterproof mud combined sealing rings, M9-seventh sealing rings, M10-eighth sealing rings, A-ground control devices, B-wellheads, C-wellheads fixing devices, D-surface layer pipes, E-technical pipes, F-production pipes, G-stratum, H-intelligent sleeves and J-production layers.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application.
Example 1
As shown in fig. 1 to 6, a remote control casing sliding sleeve based on potential difference communication comprises an insulating casing joint 1, an electrical nipple, a sliding sleeve nipple and a casing joint 15 which are connected in sequence; the sliding sleeve nipple comprises a sliding sleeve outer cylinder 9, a sliding sleeve 12 and a sliding sleeve inner cylinder 13, the sliding sleeve inner cylinder 13 is arranged on the inner side of the sliding sleeve outer cylinder 9, a hydraulic channel chamber YQ1 is formed between the sliding sleeve outer cylinder 9 and the sliding sleeve inner cylinder 13, and the sliding sleeve 12 is arranged in the hydraulic channel chamber YQ 1;
the sliding sleeve outer cylinder 9 is provided with a first fracturing fluid channel hole 91, the sliding sleeve inner cylinder 13 is provided with a third fracturing fluid channel hole 131, and the positions of the first fracturing fluid channel hole 91 and the third fracturing fluid channel hole 131 are opposite; a second fracturing fluid passage hole 121 is formed in the middle of the sliding sleeve 12;
the position, close to the electrical short section, in the sliding sleeve inner cylinder 13 is provided with a two-position two-way electromagnetic valve 11, and an electromagnetic valve liquid flow inlet 111 of the two-position two-way electromagnetic valve 11 faces the inner side of the sliding sleeve inner cylinder 13.
The electrical short section comprises an electrical inner protection cylinder 2 and an electrical outer protection cylinder 3, wherein the electrical inner protection cylinder 2 is arranged on the inner side of the electrical outer protection cylinder 3, and an electrical system installation cavity DQ1 is formed between the electrical inner protection cylinder 2 and the electrical outer protection cylinder 3.
The electric system installation chamber DQ1 is internally provided with a communication circuit board 5, a battery 6 and a valve control circuit board 7, and the communication circuit board 5, the battery 6, the valve control circuit board 7 and the two-position two-way electromagnetic valve 11 are sequentially connected.
The insulation sleeve joint 1 and the electric inner protection cylinder 2 are sealed by a sealing ring; the insulation sleeve joint 1 is connected with the electric outer protection cylinder 3 through threads, and is sealed through a sealing ring.
The electrical nipple and the sliding sleeve nipple are connected through a sliding sleeve joint 8.
The sliding sleeve joint 8 is connected with the sliding sleeve pup joint through screw threads and is sealed through a sealing ring.
The insulating sleeve joint 1 and the sliding sleeve joint 8 are respectively provided with a cable passage hole 81.
The insulating sleeve joint 1 is isolated from the electrical short section by the insulating vulcanized rubber 16.
The sliding sleeve outer cylinder 9 and the sliding sleeve inner cylinder 13 are respectively connected with the sliding sleeve 12 through a waterproof mud combined sealing ring M8. As shown in fig. 4 and 5, since the working environment of the present application is in a liquid containing gravel or cement fine particles, it is necessary to consider a particle-proof hydraulic seal, and the cement-proof composite seal M8 also has a friction-reducing function. The two cement-resistant composite seal rings M8 of fig. 4 and 6 are identical, one end of the two identical cement-resistant composite seal rings M8 is used for sealing liquid, and the other end of the higher seal ring is used for sealing sand or cement particles. The left and right ends of the combined sealing ring in fig. 5 are mainly used for preventing particle medium liquid sealing, and the middle is mainly used for liquid sealing.
The sliding sleeve 12 is fixed by the sliding sleeve outer cylinder 9 through the anti-moving pin 14.
The application has the external diameter of 170mm, the internal diameter of 114mm, the internal pressure of 140MPa, the external pressure of 120MPa and the temperature resistance of 150 ℃, and has the capability of maintaining the large diameter of the well bore and the integrity of the well bore; meanwhile, the application is applicable to all oil and gas wells, and is applicable to vertical wells, high-inclination wells and horizontal wells.
Example 2
In the application, if a signal is to be transmitted from the ground to the sleeve sliding sleeve under the well, one pole of current or voltage with a certain size is applied to the sleeve on the ground, the other pole is installed at a position of 50-200 m (in theoretical calculation, only 20m away from the center of the sleeve is needed), the upper end of the sleeve sliding sleeve under the well is provided with an insulating sleeve joint 1 in consideration of the stray electromagnetic interference on the site, the farther and better the distance is, the distance is more than 100 m away from the center of the sleeve), the upper sleeve of the well cementation sleeve is insulated and isolated from the sleeve sliding sleeve of the application, the upper sleeve of the well cementation sleeve is connected with a communication circuit board 5 of the application through a cable wire from the inside of the insulating sleeve joint 1, and the communication circuit board 5 takes the sleeve behind as a potential reference, thus an approximate potential difference (or current) detection circuit at the two ends of the sleeve sliding sleeve is formed. The communication circuit board 5 in the underground sleeve receives the ground emission current or voltage change value, amplifies and filters the received micro-potential signal, demodulates the ground emission current or voltage change value to obtain a ground control instruction, outputs the ground control instruction to the electromagnetic valve control circuit board 7, drives the two-position two-way electromagnetic valve 11 to open, introduces high-pressure liquid of the sleeve inner barrel 13 into the hydraulic channel chamber YQ1, and accordingly pushes the sleeve 12 to be aligned with the first fracturing fluid channel hole 91, the second fracturing fluid channel hole 121 and the third fracturing fluid channel hole 131, and then communicates the sleeve inner barrel 13 with the outside. The process of transmitting signals downhole to the surface is the reverse process of the surface downwards.
Example 3
As shown in fig. 7, the string structure for installing the sleeve sliding sleeve comprises a ground control device A, a well platform B, a surface layer conduit D, a technical conduit E and a production conduit F, wherein the diameters of the surface layer conduit D, the technical conduit E and the production conduit F are sequentially reduced, and the lengths of the surface layer conduit D, the technical conduit E and the production conduit F are sequentially increased; the surface layer conduit D is vertically buried in the stratum G, the technical conduit E is arranged on the inner side of the surface layer conduit D, and the production conduit F is arranged on the inner side of the technical conduit E; the ground control device A is connected with the production conduit F through a cable; the sleeve sliding sleeve is arranged on the inner side of the production conduit F.
The prior art generally adopts to establish a special control channel between the ground and the casing, but as the exploitation depth and the exploitation section number increase, the establishment of the control channel not only prolongs the exploitation time, but also is costly and laborious, and cannot meet the exploitation conditions of the existing petroleum well. In this embodiment, the ground control device a sends a control command, the control command is transmitted to the production conduit F through a cable, the production conduit F is usually made of metal materials because of bearing higher pressure and higher temperature, the production conduit F transmits the control command to the two-position two-way electromagnetic valve 11, and the two-position two-way electromagnetic valve 11 can open the sliding sleeve 12.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (8)
1. The remote control sleeve sliding sleeve based on potential difference communication is characterized by comprising an insulating sleeve joint (1), an electrical short joint, a sliding sleeve short joint and a sleeve joint (15) which are connected in sequence; the sliding sleeve nipple comprises a sliding sleeve outer cylinder (9), a sliding sleeve (12) and a sliding sleeve inner cylinder (13), wherein the sliding sleeve inner cylinder (13) is arranged on the inner side of the sliding sleeve outer cylinder (9), a hydraulic channel chamber (YQ 1) is formed between the sliding sleeve outer cylinder (9) and the sliding sleeve inner cylinder (13), and the sliding sleeve (12) is arranged in the hydraulic channel chamber (YQ 1);
the sliding sleeve outer cylinder (9) is provided with a first fracturing fluid channel hole (91), the sliding sleeve inner cylinder (13) is provided with a third fracturing fluid channel hole (131), and the positions of the first fracturing fluid channel hole (91) and the third fracturing fluid channel hole (131) are opposite; a second fracturing fluid passage hole (121) is formed in the middle of the sliding sleeve (12);
a two-position two-way electromagnetic valve (11) is arranged in the sliding sleeve inner cylinder (13) and close to the electrical short section, and an electromagnetic valve liquid flow inlet (111) of the two-position two-way electromagnetic valve (11) faces the inner side of the sliding sleeve inner cylinder (13);
the electrical short section is provided with an electrical system installation cavity, and a communication circuit board (5) and an electromagnetic valve control circuit board (7) are arranged in the electrical system installation cavity;
the method comprises the steps that signals are transmitted from the ground to a sleeve sliding sleeve under the well, one pole of current or voltage with a certain size is applied to the sleeve on the ground, the other pole is installed at a position which is more than 100 meters away from the center of the sleeve, the upper sleeve of the well cementation sleeve is insulated and isolated from the sleeve sliding sleeve by an insulating sleeve joint (1), the upper sleeve of the well cementation sleeve is connected with a communication circuit board (5) by penetrating a cable wire from the inside of the insulating sleeve joint (1), and the communication circuit board (5) takes the sleeve at the back as a potential reference, so that an approximate potential difference detection circuit at the two ends of the sleeve sliding sleeve is formed; a communication circuit board (5) in the underground sleeve sliding sleeve receives a ground emission current or voltage change value, amplifies and filters a received micro-potential signal, demodulates the received micro-potential signal to obtain a ground control instruction, outputs the instruction to an electromagnetic valve control circuit board (7), and drives a two-bit two-way electromagnetic valve (11) to be opened;
the two-position two-way electromagnetic valve is in a closed state before the two-way electromagnetic valve does not act;
when the two-position two-way electromagnetic valve is opened, high-pressure liquid in the sliding sleeve inner cylinder (13) flows through a liquid flow inlet of the two-position two-way electromagnetic valve (11) to reach a hydraulic channel chamber and pushes the sliding sleeve (12), after the sliding sleeve (12) moves to a terminal, the first fracturing fluid channel hole (91), the second fracturing fluid channel hole (121) and the third fracturing fluid channel (131) are aligned, and the underground sleeve sliding sleeve is in an open state;
the sliding sleeve outer cylinder (9) fixes the sliding sleeve (12) through arranging an anti-moving pin (14);
the sliding sleeve outer cylinder (9) and the sliding sleeve inner cylinder (13) are respectively connected with the sliding sleeve (12) through a waterproof mud combined sealing ring (M8); the cement-proof combined sealing rings (M8) are provided with three groups, wherein two groups of cement-proof combined sealing rings are the same, one end is used for sealing liquid, and the other end is higher and used for sealing sand or cement particles; the other group of waterproof mud combined sealing rings are higher at the left end and the right end, and are mainly used for preventing particle medium liquid sealing, and the middle is mainly used for liquid sealing.
2. A remote control sleeve sliding sleeve based on potential difference communication according to claim 1, characterized in that the electrical nipple comprises an electrical inner protection cylinder (2) and an electrical outer protection cylinder (3), the electrical inner protection cylinder (2) is arranged inside the electrical outer protection cylinder (3), and an electrical system installation chamber (DQ 1) is formed between the electrical inner protection cylinder (2) and the electrical outer protection cylinder (3).
3. The remote control sleeve sliding sleeve based on potential difference communication according to claim 2, wherein a battery (6) is further arranged in the electrical system installation chamber (DQ 1), and the communication circuit board (5), the battery (6), the valve control circuit board (7) and the two-position two-way electromagnetic valve (11) are sequentially connected.
4. A remotely controlled casing sliding sleeve based on potential difference communication according to claim 1, characterized in that the insulating casing joint (1) is isolated from the electrical nipple by the provision of insulating vulcanized rubber (16).
5. A remote control sleeve sliding sleeve based on potential difference communication according to claim 1, characterized in that the insulation sleeve joint (1) and the electrical inner protection cylinder (2) are sealed by a sealing ring; the insulation sleeve joint (1) is connected with the electric outer protection cylinder (3) through screw threads, and is sealed through a sealing ring.
6. The remotely controlled casing sliding sleeve based on potential difference communication according to claim 1, wherein the electrical nipple and the sliding sleeve nipple are connected through a sliding sleeve joint (8).
7. The remote control sleeve sliding sleeve based on potential difference communication according to claim 6, wherein the sliding sleeve joint (8) is connected with the sliding sleeve nipple through screw threads and is sealed through a sealing ring.
8. The remote control sleeve sliding sleeve based on potential difference communication according to claim 6, wherein cable passage holes (81) are formed in the insulating sleeve joint (1) and the sliding sleeve joint (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710664747.0A CN107288580B (en) | 2017-08-07 | 2017-08-07 | Remote control sleeve sliding sleeve based on potential difference communication |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710664747.0A CN107288580B (en) | 2017-08-07 | 2017-08-07 | Remote control sleeve sliding sleeve based on potential difference communication |
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| CN107288580A CN107288580A (en) | 2017-10-24 |
| CN107288580B true CN107288580B (en) | 2023-08-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722038B (en) * | 2020-06-18 | 2022-11-29 | 浙江省开化七一电力器材有限责任公司 | Shielding sleeve detection device |
| CN111706295B (en) * | 2020-07-14 | 2021-03-23 | 西南石油大学 | Radio electromagnetic wave direct-current control pressure-relief sleeve valve |
| CN115324526B (en) * | 2022-07-25 | 2024-02-09 | 中国石油天然气集团有限公司 | Underground sliding sleeve system based on magnetic field mutation detection and control method thereof |
| CN115478810B (en) * | 2022-09-21 | 2024-03-19 | 中国石油天然气集团有限公司 | Magnetic medium-based induction type sliding sleeve and downhole tool control method |
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| CA1336882C (en) * | 1988-01-29 | 1995-09-05 | Michel Tholance | Sliding sleeve valve for the production of bored tube wells |
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| CN202731841U (en) * | 2012-06-01 | 2013-02-13 | 中国石油天然气股份有限公司 | Controllable differential pressure type sliding sleeve |
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