CN111663922B - Underground decoder system - Google Patents
Underground decoder system Download PDFInfo
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- CN111663922B CN111663922B CN202010329191.1A CN202010329191A CN111663922B CN 111663922 B CN111663922 B CN 111663922B CN 202010329191 A CN202010329191 A CN 202010329191A CN 111663922 B CN111663922 B CN 111663922B
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- 230000006837 decompression Effects 0.000 claims description 55
- 238000009434 installation Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 60
- 239000010720 hydraulic oil Substances 0.000 abstract description 10
- 239000010410 layer Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 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
-
- 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
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- 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
- E21B47/00—Survey of boreholes or wells
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- Life Sciences & Earth Sciences (AREA)
- 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)
- Geophysics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an underground decoder system, which comprises a decoder, a pressure release valve, a sliding sleeve, a one-way valve and an oil pipe opening, wherein the pressure release valve is a hydraulic control type three-position five-way valve and comprises two hydraulic control input ports and five openings, two output ports of the decoder are respectively and correspondingly connected with the two hydraulic control input ports of the pressure release valve for controlling the end position operation state of the pressure release valve, the two output ports of the decoder are also respectively and correspondingly connected with a first opening and a second opening of the pressure release valve for supplying oil to the pressure release valve, a third opening and a fourth opening of the pressure release valve are respectively and correspondingly connected with two ends of the sliding sleeve, the fifth opening of the pressure release valve is connected with the oil pipe opening through the one-way valve to be connected with an underground hydraulic system of a three-pipeline control six-position sliding sleeve, the invention arranges the pressure release valve between the decoder and the sliding sleeve to discharge the hydraulic oil in the sliding sleeve into a shaft, preventing the hydraulic oil from reentering the interior of the pipeline to cause system pressure fluctuation.
Description
Technical Field
The invention belongs to the technical field of oil and gas exploitation, and particularly relates to an underground decoder system.
Background
In order to realize fine exploitation of oil fields and reduce interlayer contradictions, layered development is widely adopted in oil fields at present. The existing problems are that the number of layers of a mining well is large, interlayer contradiction is large, and development is difficult. In order to solve the problem, a full-electric control or hydraulic control mode is widely adopted at present, in order to realize multilayer hydraulic control separate production, two hydraulic control pipelines are required to be installed on each hydraulic control sliding sleeve device at present, the process feasibility is not high when the number of the pipelines is too large, meanwhile, the decoding technology adopted at present enables backflow hydraulic oil of a hydraulic control valve to directly enter a hydraulic control system, the pressure fluctuation of the hydraulic control system is caused, the pressure control is influenced, meanwhile, the cleanliness of the backflow hydraulic oil is not high, the pollution of the hydraulic control system is easily caused, and the control precision is influenced.
Disclosure of Invention
It is an object of the present invention to overcome the deficiencies of the prior art and to provide a downhole decoder system.
The technical scheme adopted by the invention for achieving the aim is as follows:
a downhole decoder system, characterized by: including a decoder, a relief valve, a sliding sleeve, a check valve and an oil pipe trompil, the relief valve is hydraulic control type tribit five-way valve, including two hydraulic control input ports and five openings, two delivery outlets of decoder are connected with two hydraulic control input ports one-to-ones of relief valve respectively, be used for controlling the end position operating condition of relief valve, and two delivery outlets of decoder still are connected with the first opening and the second opening one-to-ones of relief valve respectively, be used for supplying fluid to the relief valve, the third opening and the fourth opening of relief valve are connected with the both ends mouth one-to-one of sliding sleeve respectively, the fifth opening of relief valve passes through the check valve and is connected with the oil pipe trompil.
In the technical scheme, when the pressure release valve is in a left end position operation state, the first opening and the third opening of the pressure release valve are communicated, and the fourth opening and the fifth opening are communicated, so that the oil liquid pushes the sliding sleeve to move in the positive direction and the oil liquid in the sliding sleeve enters the oil pipe opening through the fourth opening, the fifth opening and the one-way valve; when the pressure release valve is in the right end position operation state, the second opening and the fourth opening of the pressure release valve are communicated, and the third opening and the fifth opening are communicated, so that the oil liquid pushes the sliding sleeve to move in the reverse direction, and the oil liquid in the sliding sleeve enters the oil pipe hole through the third opening, the fifth opening and the one-way valve.
In the technical scheme, after the decoder is started, when the oil pressure output by the output port of the decoder is increased to the working pressure required by the sliding sleeve, the passages among the decoder, the pressure release valve, the sliding sleeve, the one-way valve and the oil pipe opening are communicated; the moving direction of the sliding sleeve is controlled by controlling the different output ports of the decoder to output oil pressure to the operating pressure required by the sliding sleeve.
In the technical scheme, the decoder is structurally characterized by comprising a valve body, a valve core, a valve control lock sleeve (A3), a valve control lock ball (A4), an upper end return spring (A5) and a lower end return spring (A10);
an upper connector (A1) and a lower connector (A11) are respectively installed at two ends of the valve body, the valve control lock sleeve (A3) is installed in a first installation cavity between the upper connector (A1) and the valve body in a sliding mode, the valve core is installed in the valve body, one end of the valve core is installed in a second installation cavity of the upper connector (A1) in a sliding mode, the other end of the valve core is installed with a lower end return spring in an acting mode, and restoring force in the direction of the upper connector is provided for the valve core through the lower end return spring;
the valve control lock ball (A4) is arranged in an installation channel of the upper joint (A1), the bottom of the installation channel is communicated with the second installation cavity, and the top of the installation channel is communicated with the first installation cavity; a first groove (A6-1) used for being matched with the valve control lock ball (A4) is formed in the outer wall of the valve core, and a second groove (A3-1) used for being matched with the valve control lock ball (4) is formed in the inner wall of the valve control lock sleeve (A3); when the valve control locking ball (A4) is matched with the first groove of the valve core, the valve core is in a locking state and cannot move; the valve control lock ball (A4) enters the second groove of the valve control lock sleeve upwards to be in an unlocking state, and the valve core can move;
the valve body is sequentially provided with a decoder opening a, a decoder opening b, a decoder opening c, a decoder opening g, a decoder opening d, a decoder opening h, a decoder opening e and a decoder opening f along the direction from the upper connector (A1) to the lower connector (A11), wherein the decoder opening g and the decoder opening h are two output ports of a decoder, the decoder opening a is arranged above the valve control lock sleeve (A3), and the decoder opening a pushes the valve control lock sleeve (A3) to move rightwards after oil is injected; a sealing gasket is arranged in the valve body between the decoder opening b and the decoder opening c to isolate the decoder opening b from the decoder opening c;
the valve core is provided with a first plugging and expanding section (A9-1), a second plugging and expanding section (A9-2) and a third plugging and expanding section (A9-3), the first plugging and expanding section is positioned between the decoder opening c and the decoder opening g, the effects of isolating the decoder opening c and the decoder opening g are achieved, oil is injected from the decoder opening c and then pushes the first plugging and expanding section to move rightwards, and the first plugging and expanding section drives the valve core to move; the second plugging and expanding section is arranged between the decoder opening hole d and the decoder opening hole h, and plays a role in isolating the decoder opening hole d from the decoder opening hole h and plugging the decoder opening hole d; the third plugging and expanding section is arranged between the decoder opening hole e and the decoder opening hole f, and plays a role in isolating the decoder opening hole e and the decoder opening hole f and plugging the decoder opening hole e;
an upper end return spring (A5) for providing restoring force to the valve control lock sleeve (A3) in the direction of the upper joint is arranged in the valve body.
In the technical scheme, the inner wall of the valve body is also provided with a limit step (A2-1) for limiting the rightward movement position of the valve control lock sleeve (A3).
In the technical scheme, the initial state of the second plugging and expanding section is positioned at the opening d of the decoder, and the second plugging and expanding section is positioned between the opening d of the decoder and the opening h of the decoder after being unlocked; the initial state of the third plugging expanding section is positioned at the opening e of the decoder, and the third plugging expanding section is positioned between the opening e of the decoder and the opening f of the decoder after being unlocked.
In the technical scheme, the upper connector of the decoder is provided with a reducing section, and a first mounting cavity is formed between the reducing section and the inner cavity of the valve.
In the above technical solution, an axial hole is formed at an inner end of an upper joint of the decoder, and the axial hole forms a second mounting cavity.
In the technical scheme, the inner end of the lower joint (A11) of the decoder is provided with a third mounting cavity for mounting a lower end return spring (A10).
In the technical scheme, the valve core of the decoder is formed by butting an upper valve core (A6) and a lower valve core (A9).
The invention has the advantages and beneficial effects that:
in the ground test process of the existing test decoder, the decoder pushes the sliding sleeve to act after being unlocked, and the hydraulic oil discharged after the sliding sleeve acts enters a decoder system again, so that the pressure of a pipeline in the system is unstable, and the decoding failure is caused. Through the relief valve addition, reveal the pit shaft inside with sliding sleeve action discharge fluid to avoid fluid to get into hydraulic system and arouse the system disorder, guaranteed the clean degree of fluid simultaneously, satisfy the liquid accuse demand.
The decoder system of the invention can realize that the independent control of 6 decoder systems can be completed by using three hydraulic pipelines through the combination of the decoder and the pressure relief valve.
Drawings
The invention is briefly described based on the drawings and illustrates an application example of the invention.
FIG. 1: the whole schematic diagram of the shaft structure of the hydraulic decoding technology is shown;
FIG. 2 is a schematic diagram: the structure distribution schematic diagram of the underground decoding hydraulic system is shown;
FIG. 3: the invention is a schematic view of the structure of the underground decoder system 1;
FIG. 4: schematic layout of the downhole decoder system 1 of the present invention in a wellbore;
FIG. 5: the invention is a schematic view of the structure of the underground decoder system 2;
FIG. 6: the invention is a schematic view of the structure of the underground decoder system 3;
FIG. 7: the invention is a schematic structural diagram of the underground decoder system 4;
FIG. 8: the invention is a schematic view of the structure of the underground decoder system 5;
FIG. 9: the invention is a schematic view of the structure of the underground decoder system 6;
FIG. 10: the structure of the decoder of the invention is shown schematically (initial state);
FIG. 11: the decoder of the invention has a partial enlarged structure schematic diagram (initial state);
FIG. 12: the invention has the advantages that the decoder has a partially enlarged structure schematic diagram (the valve control lock ball is separated from the first groove state);
FIG. 13: the structure of the decoder of the invention is shown schematically (the decoder is opened);
FIG. 14: the invention has the structural schematic diagram (the valve control lock sleeve moves to the position of the limit ladder).
Description of the symbols:
1. surface working equipment, 2. downhole decoder system 1, 201. decoder 1, 201a. decoder opening 11, 201b. decoder opening 12, 201c. decoder opening 13, 201d. decoder opening 14, 201e. decoder opening 15, 201f. decoder opening 16, 201g. decoder opening 17, 201h. decoder opening 18, 202. relief valve 1, 202a. relief valve opening 11, 202b. relief valve opening 12, 202c. relief valve opening 13, 202d. relief valve opening 14, 202e. relief valve opening 15, 202f. left return spring 11, 202g right return spring 12, 203 sliding sleeve 1, 204. check valve 1, 205. tubing bore 1, 3. 1, 4. downhole decoder system 2, 401. decoder 2, 401a. decoder opening 21, 401b. decoder opening 22, 401c. decoder opening 23, 401d. decoder opening 24, 401e. decoder opening 25, 201c. decoder opening 25, 401f decoder opening 26, 401g decoder opening 27, 401h decoder opening 28, 402 pressure relief valve 2, 402a pressure relief valve opening 21, 402b pressure relief valve opening 22, 402c pressure relief valve opening 23, 402d pressure relief valve opening 24, 402e pressure relief valve opening 25, 402f left return spring 21, 402g right return spring 22, 403 sliding sleeve 2, 404 one- way valve 2, 405 tubing bore 2, 5 packer 2, 6 downhole decoder system 3, 601, decoder 3, 601a decoder opening 31, 601b decoder opening 32, 601c decoder opening 33, 601d decoder opening 34, 601e decoder opening 35, 601f decoder opening 36, 601g decoder opening 37, 601h pressure relief valve opening 38, 602 pressure relief valve 3, 602a decoder opening 31, 602b decoder opening 32, 602c pressure relief valve opening 33, 602d decoder opening 34, 602e. relief valve opening 35, 602f left return spring 31, 602g right return spring 32, 603 sliding sleeve 3, 604 check valve 3, 605 oil tube bore 3, 7 packer 3, 8 downhole decoder system 4, 801 decoder 4, 801a decoder opening 41, 801b decoder opening 42, 801c decoder opening 43, 801d decoder opening 44, 801e decoder opening 45, 801f decoder opening 46, 801g decoder opening 47, 801h decoder opening 48, 802 relief valve 4, 802a relief valve opening 41, 802b relief valve opening 42, 802c relief valve opening 43, 802d relief valve opening 44, 802e relief valve opening 45, 802f left return spring 41, 802g right return spring 42, 803 sliding sleeve 4, 804 check valve 4, 805 oil tube bore 4, 9 packer 4, 10 downhole decoder system 5, 1001 decoder 5, 1001a, 1001b, decoder opening 52, 1001c, decoder opening 53, 1001d, decoder opening 54, 1001e, decoder opening 55, 1001f, decoder opening 56, 1001g, decoder opening 57, 1001h, decoder opening 58, 1002, relief valve 5, 1002a, relief valve opening 51, 1002b, relief valve opening 52, 1002c, relief valve opening 53, 1002d, relief valve opening 54, 1002e, relief valve opening 55, 1002f, left return spring 51, 1002g right return spring 52, 1003 sliding sleeve 5, 1004, check valve 5, 1005, tubing bore 5, 11, packer 5, 12, downhole decoder system 6, 1201, decoder 6, 1201a, decoder opening 61, 1201b, decoder opening 62, 1201c, decoder opening 63, 1201d, decoder opening 64, 1201e, decoder opening 65, 1201f, decoder opening 66, 1201g, decoder opening 67, 1201h, decoder opening 68, 1202. Pressure relief valve 6, 1202a pressure relief valve opening 61, 1202b pressure relief valve opening 62, 1202c pressure relief valve opening 63, 1202d pressure relief valve opening 64, 1202e pressure relief valve opening 65, 1202f left return spring 61, 1202g right return spring 62, 1203 slide sleeve 6, 1204 check valve 6, 1205 tubing bore 6, 13 packer 6, 14 casing, 15 tubing, 16 plug, a hydraulic line 1, a01. line 1 wellhead joint, a02. line 1, a03. line pressure relief valve 1, b. hydraulic line 2, b01. line 2 wellhead joint, b02. line 2, b03. line 2, c. hydraulic line 3, c01. line 3 wellhead joint, c02. line 3, c03. line pressure relief valve 3.
Detailed Description
The invention is further illustrated by the following figures and examples:
example one
As shown in figure 1, the downhole hydraulic system for controlling the six-layer sliding sleeve by the three pipelines comprises surface operation equipment (1), a downhole decoder system 1(2), a packer 1(3), a downhole decoder system 2(4), a packer 2(5), a downhole decoder system 3(6), a packer 3(7), a downhole decoder system 4(8), a packer 4(9), a downhole decoder system 5(10), a packer 5(11), a downhole decoder system 6(12), a packer 6(13), a casing (14), an oil pipe (15), a plug (16), a hydraulic pipeline 1(a), a hydraulic pipeline 2(b) and a hydraulic pipeline 3 (c).
The ground operation equipment (1) is positioned on the ground and used for suspending a casing (14) and an oil pipe (15) and providing hydraulic power for a hydraulic pipeline;
the hydraulic pipeline 1(a), the hydraulic pipeline 2(b) and the hydraulic pipeline 3(c) are arranged in a shaft annulus of a casing (14) and an oil pipe (15) and penetrate through the whole shaft, and the three hydraulic pipelines are sequentially connected with a ground operation device (1), a decoder system 1(2), a packer 1(3), a downhole decoder system 2(4), a packer 2(5), a downhole decoder system 3(6), a packer 3(7), a downhole decoder system 4(8), a packer 4(9), a downhole decoder system 5(10), a packer 5(11), a downhole decoder system 6(12) from the ground to the bottom, each decoder system corresponds to a reservoir needing to be produced, and packers 1(3), 2(5), 3(7), 4(9), 5(11) and 6(13) are adopted to separate the annular space in the shaft to form independent spaces. The oil pipe (15) is positioned inside the casing (14), the oil pipe (15) is attached to the casing (14) under the action of the packers 1(3), 2(5), 3(7), 4(9), 5(11) and 6(13), and the plug (16) is in threaded connection with the tail of the oil pipe (15).
Furthermore, the three-pipeline-controlled underground hydraulic system for the six-layer sliding sleeve carries out power transmission through three hydraulic pipelines, namely a hydraulic pipeline 1(a), a hydraulic pipeline 2(b) and a hydraulic pipeline 3 (c). Referring to fig. 2, a hydraulic pipeline 1(a) is composed of a pipeline 1 wellhead connector (a01), a pipeline 1(a02) and a pipeline pressure relief valve 1(a03), wherein the pipeline 1 wellhead connector (a01) is connected with the pipeline pressure relief valve 1(a03) through a pipeline 1(a 02); the hydraulic pipeline 2(b) consists of a pipeline 2 wellhead connector (b01), a pipeline 2(b02) and a pipeline pressure relief valve 2(b03), wherein the pipeline 2 wellhead connector (b01) is connected with the pipeline pressure relief valve 2(b03) through a pipeline 2(b 02); the hydraulic pipeline 3(c) consists of a pipeline 3 wellhead connector (c01), a pipeline 3(c02) and a pipeline pressure relief valve 3(c03), wherein the pipeline 3 wellhead connector (c01) is connected with the pipeline pressure relief valve 3(c03) through a pipeline 3(c 02); the pipeline 1 wellhead joint (a01), the pipeline 2 wellhead joint (b01) and the pipeline 3 wellhead joint (c01) are all connected with surface operation equipment (1) so as to carry out pressure supply operation underground.
Further, the underground hydraulic system with three pipelines for controlling the six-layer sliding sleeve has the following components and structures that 6 groups of underground decoder systems are similar to each other: referring to fig. 3 and 4, the downhole decoder system 1(2) is composed of a decoder 1(201), a pressure relief valve 1(202), a sliding sleeve 1(203), a one-way valve 1(204) and an oil pipe opening 1(205), the specific wellbore layout is shown in fig. 4, the decoder 1(201) is connected with the sliding sleeve 1(203) through the pressure relief valve 1(202), the oil pipe opening 1(205) is connected with the pressure relief valve 1(202) through the one-way valve 1(204), the layout of each layer of decoder system is similar, and the description of the drawing is not performed one by one; the underground decoder system 2(4) consists of a decoder 2(401), a pressure relief valve 2(402), a sliding sleeve 2(403), a one-way valve 2(404) and an oil pipe opening 2(405), wherein the decoder 2(401) is connected with the sliding sleeve 2(403) through the pressure relief valve 2(402), and the oil pipe opening 2(405) is connected with the pressure relief valve 2(402) through the one-way valve 2 (404); the underground decoder system 3(6) is composed of a decoder 3(601), a pressure relief valve 3(602), a sliding sleeve 3(603), a one-way valve 3(604) and an oil pipe opening 3(605), wherein the decoder 3(601) is connected with the sliding sleeve 3(603) through the pressure relief valve 3(602), and the oil pipe opening 3(605) is connected with the pressure relief valve 3(602) through the one-way valve 3 (604); the underground decoder system 4(8) is composed of a decoder 4(801), a pressure relief valve 4(802), a sliding sleeve 4(803), a one-way valve 4(804) and an oil pipe opening 4(805), wherein the decoder 4(801) is connected with the sliding sleeve 4(803) through the pressure relief valve 4(802), and the oil pipe opening 4(805) is connected with the pressure relief valve 4(802) through the one-way valve 4 (804); the underground decoder system 5(10) consists of a decoder 5(1001), a pressure relief valve 5(1002), a sliding sleeve 5(1003), a one-way valve 5(1004), and an oil pipe opening 5(1005), wherein the decoder 5(1001) is connected with the sliding sleeve 5(1003) through the pressure relief valve 5(1002), and the oil pipe opening 5(1005) is connected with the pressure relief valve 5(1002) through the one-way valve 5 (1004); the underground decoder system 6(12) is composed of a decoder 6(1201), a pressure relief valve 6(1202), a sliding sleeve 6(1203), a one-way valve 6(1204), and an oil pipe opening 6(1205), wherein the decoder 6(1201) is connected with the sliding sleeve 6(1203) through the pressure relief valve 6(1202), and the oil pipe opening 6(1205) is connected with the pressure relief valve 6(1202) through the one-way valve 6 (1204). The above 6 sets of downhole decoder systems operate in a similar manner but are independent systems, wherein the decoders 1(201), 2(401), 3(601), 4(801), 5(1001) and 6(1201) are combined with the hydraulic pipeline 1(a), 2(b) and 3(c) to perform joint coding and decoding to control the sliding sleeve 1(203), the sliding sleeve 2(403), the sliding sleeve 3(603), the sliding sleeve 4(803), the sliding sleeve 5(1003) and the sliding sleeve 6(1203) to adjust. Therefore, layered control is realized, interlayer contradiction is balanced, and ordered combined mining of multiple layers is achieved. The invention relates to a hydraulic control system, which is characterized in that a pipeline of the hydraulic control system is possibly mixed with air in a long-time standing state, and when the hydraulic system works, the air is introduced into a hydraulic control valve to cause the misoperation of the hydraulic control system. Meanwhile, the pressure relief valves 1(202), 2(402), 3(602), 4(802), 5(1002) and 6(1202) are designed and connected between the decoder and the sliding sleeve, so that the guide of the backflow liquid is realized, and the backflow liquid of the hydraulic control sliding sleeve is discharged to an annular space, so that the backflow liquid is prevented from entering a hydraulic control system loop to cause loop pressure fluctuation, and the disorder of the control system and possible pollution are avoided.
Furthermore, in the downhole hydraulic system of the three-pipeline controlled six-layer sliding sleeve, the operation principle of the decoder is mainly operated through 8 flow ports, each layer of decoder adopts different symbols for illustration, but the port connection of each layer of decoder is consistent structurally, an opening with a suffix of a code sign a is connected with an opening with a suffix of a code sign e through a hydraulic control pipeline, an opening with a suffix of a code sign b is connected with an opening with a suffix of a code sign f, an opening with a suffix of a code sign c is connected with an opening with a suffix of a code sign d through a hydraulic control pipeline, the opening with the suffix of a code sign g is communicated with an opening with a suffix of a code sign h, and the communicated openings are connected with a hydraulic pipeline 1(a), a hydraulic pipeline 2(b) and a hydraulic pipeline 3(c) in different orders to form a code, as shown in fig. 3, fig. 5, 6, 7, 8 and 9 show the port connection from the first layer bit decoder to the sixth layer bit decoder and the connection to the hydraulic line, respectively, and, more specifically, wherein the decoder 1(201) comprises a decoder opening 11(201a), a decoder opening 12(201b), a decoder opening 13(201c), a decoder opening 14(201d), a decoder opening 15(201e), a decoder opening 16(201f), a decoder opening 17(201g) and a decoder opening 18(201h), wherein decoder port 13(201c) and decoder port 14(201d) are connected to hydraulic line 1(a), decoder port 11(201a) and decoder port 15(201e) are connected to hydraulic line 2(b), decoder port 12(201b) and decoder port 16(201f) are connected to hydraulic line 3(c), and decoder port 17(201g) and decoder port 18(201h) are connected to pressure relief valve 1 (202); decoder 2(401) comprises decoder opening 21(401a), decoder opening 22(401b), decoder opening 23(401c), decoder opening 24(401d), decoder opening 25(401e), decoder opening 26(401f), decoder opening 27(401g), decoder opening 28(401h), wherein decoder opening 23(401c) and decoder opening 24(401d) are connected to hydraulic line 1(a), decoder opening 21(401a) and decoder opening 25(401e) are connected to hydraulic line 3(c), decoder opening 22(401b) and decoder opening 26(401f) are connected to hydraulic line 2(b), and decoder opening 27(401g) and decoder opening 28(401h) are connected to pressure relief valve (2) (402); decoder 3(601) comprises decoder opening 31(601a), decoder opening 32(601b), decoder opening 33(601c), decoder opening 34(601d), decoder opening 35(601e), decoder opening 36(601f), decoder opening 37(601g), decoder opening 38(601h), wherein decoder opening 33(601c) and decoder opening 34(601d) are connected to hydraulic line 2(b), decoder opening 31(601a) and decoder opening 35(601e) are connected to hydraulic line 1(a), decoder opening 32(601b) and decoder opening 36(601f) are connected to hydraulic line 3(c), decoder opening 37(601g) and decoder opening 38(601h) are connected to pressure relief valve 3 (602); decoder 4(801) comprises decoder opening 41(801a), decoder opening 42(801b), decoder opening 43(801c), decoder opening 44(801d), decoder opening 45(801e), decoder opening 46(801f), decoder opening 47(801g), decoder opening 48(801h), wherein decoder opening 43(801c) and decoder opening 44(801d) are connected to hydraulic line 2(b), decoder opening 41(801a) and decoder opening 45(801e) are connected to hydraulic line 3(c), decoder opening 42(801b) and decoder opening 46(801f) are connected to hydraulic line 1(a), decoder opening 47(801g) and decoder opening 48(801h) are connected to pressure relief valve 4 (802); decoder 5(1001) comprises decoder opening 51(1001a), decoder opening 52(1001b), decoder opening 53(1001c), decoder opening 54(1001d), decoder opening 55(1001e), decoder opening 56(1001f), decoder opening 57(1001g), decoder opening 58(1001h), wherein decoder opening 53(1001c) and decoder opening 54(1001d) are connected to hydraulic line 3(c), decoder opening 51(1001a) and decoder opening 55(1001e) are connected to hydraulic line 1(1001a), decoder opening 52(1001b) and decoder opening 56(1001f) are connected to hydraulic line 2(b), and decoder opening 57(1001g) and decoder opening 58(1001h) are connected to relief valve 5 (1002); the decoder 6(1201) comprises a decoder opening 61(1201a), a decoder opening 62(1201b), a decoder opening 63(1201c), a decoder opening 64(1201d), a decoder opening 65(1201e), a decoder opening 66(1201f), a decoder opening 67(1201g), a decoder opening 68(1201h), wherein the decoder opening 63(1201c) and the decoder opening 64(1201d) are connected to the hydraulic line 3(c), the decoder opening 61(1201a) and the decoder opening 65(1201e) are connected to the hydraulic line 2(b), the decoder opening 62(1201b) and the decoder opening 66(1201f) are connected to the hydraulic line 1(a), and the decoder opening 67(1201g) and the decoder opening 68(1201h) are connected to the pressure relief valve 6 (1202). During operation, after 5MPa pressure is applied to the opening with the suffix of the code symbol c, then 5MPa pressure is applied to the opening with the suffix of the code symbol a, the decoder can be opened, the opening with the suffix of the code symbol d is communicated with the opening with the suffix of the code symbol g, and meanwhile the opening with the suffix of the code symbol e is communicated with the opening with the suffix of the code symbol h, so that the decoder, the pressure relief valve and the sliding sleeve are communicated with each other, and then the opening with the suffix of the code symbol d or e is increased to the working pressure 10MPa required by the sliding sleeve, so that the independent control of the sliding sleeve is realized.
Further, in the underground hydraulic system with three pipelines controlling the six-layer sliding sleeve, the pressure release valves in each underground decoder system are all hydraulic control type three-position five-way valves, and the connection relationship of each pressure release valve is specifically described as follows: the decompression valve 1(202) is a hydraulic control type three-position five-way valve, five ports are respectively a decompression valve opening 11(202a), a decompression valve opening 12(202b), a decompression valve opening 13(202c), a decompression valve opening 14(202d) and a decompression valve opening 15(202e), a left reset spring 11(202f) is propped against the left end of the decompression valve 1(202), a right reset spring 12(202g) is propped against the right end of the decompression valve 1(202), the decompression valve 1(202) is also provided with two hydraulic control input ports, wherein the two hydraulic control input ports are respectively and correspondingly connected with a decoder opening 17(201g) and a decoder opening 18(201h) of a decoder 1(201), the decompression valve opening 12(202b) is connected with an oil pipe opening 1(205) through a one-way valve 1(204), the decompression valve opening 14(202d) and the decompression valve opening 15(202e) are respectively and correspondingly connected with two end openings of a sliding sleeve 1(203), the pressure relief valve opening 11(202a) and the pressure relief valve opening 13(202c) are connected to the decoder opening 17(201g) and the decoder opening 18(201h), respectively, in one-to-one correspondence; in the left end position operation state, the pressure relief valve opening 11(202a) is communicated with the pressure relief valve opening 14(202d), and the pressure relief valve opening 12(202b) is communicated with the pressure relief valve opening 15(202 e); in the right end position operation state, the relief valve opening 12(202b) communicates with the relief valve opening 14(202d), and the relief valve opening 13(202c) communicates with the relief valve opening 15(202 e). The decompression valve 2(402) is a hydraulic control type three-position five-way valve, five ports are respectively a decompression valve opening 21(402a), a decompression valve opening 22(402b), a decompression valve opening 23(402c), a decompression valve opening 24(402d) and a decompression valve opening 25(402e), a left reset spring 21(402f) is pressed against the left end of the decompression valve 2(402), a right reset spring 22(402g) is pressed against the right end of the decompression valve 2(402), the decompression valve 2(402) is also provided with two hydraulic control input ports which are respectively connected with a decoder opening 27(401g) and a decoder opening 28(401h) of the decoder 2(401) and a one-to-one correspondence of the two hydraulic control input ports, the decompression valve opening 22(402b) is connected with an oil pipe opening 2(405) through a one-way valve 2(404), the decompression valve opening 24(402d) and the decompression valve opening 25(402e) are respectively connected with two ports of the sliding sleeve 2(403), the pressure-release-valve opening 21(402a) and the pressure-release-valve opening 23(402c) are connected to the decoder opening 27(401g) and the decoder opening 28(401h), respectively, in one-to-one correspondence; in the left end position operating state, the relief valve opening 21(402a) communicates with the relief valve opening 24(402d), and the relief valve opening 22(402b) communicates with the relief valve opening 25(402 e); in the right end position operation state, the relief valve opening 22(402b) communicates with the relief valve opening 24(402d), and the relief valve opening 23(402c) communicates with the relief valve opening 25(402 e). The pressure release valve 3(602) is a hydraulic control type three-position five-way valve, the five ports are a pressure release valve opening 31(602a), a pressure release valve opening 32(602b), a pressure release valve opening 33(602c), a pressure release valve opening 34(602d) and a pressure release valve opening 35(602e), respectively, a left return spring 31(602f) is supported on the left end of the pressure release valve 3(602), a right return spring 32(602g) is supported on the right end of the pressure release valve 3(602), the pressure release valve 3(602) further has two hydraulic control input ports, the two hydraulic control input ports are respectively connected with a decoder opening 37(601g) and a decoder opening 38(601h) of the decoder 3(601) in a one-to-one correspondence manner, the pressure release valve opening 32(602b) is connected with an oil pipe opening 3(605) through a one-way valve 3(604), the pressure release valve opening 34(602d) and the pressure release valve opening 35(602e) are connected with two ports of the sliding sleeve 3(603) in a one-to-one correspondence manner, the pressure relief valve opening 31(602a) and the pressure relief valve opening 33(602c) are connected in one-to-one correspondence with the decoder opening 37(601g) and the decoder opening 38(601h), respectively; in the left end position operating state, the relief valve opening 31(602a) communicates with the relief valve opening 34(602d), and the relief valve opening 32(602b) communicates with the relief valve opening 35(602 e); in the right end position operation state, the relief valve opening 32(602b) communicates with the relief valve opening 34(602d), and the relief valve opening 33(602c) communicates with the relief valve opening 35(602 e). The decompression valve 4(802) is a hydraulic control type three-position five-way valve, five ports are respectively a decompression valve opening 41(802a), a decompression valve opening 42(802b), a decompression valve opening 43(802c), a decompression valve opening 44(802d) and a decompression valve opening 45(802e), a left reset spring 41(802f) is pressed against the left end of the decompression valve 4(802), a right reset spring 42(802g) is pressed against the right end of the decompression valve 4(802), the decompression valve 4(802) is also provided with two hydraulic control input ports which are respectively connected with a decoder opening 47(801g) and a decoder opening 48(801h) of a decoder 4(801), the decompression valve opening 42(802b) is connected with an oil pipe opening 4(805) through a one-way valve 4(804), the decompression valve opening 44(802d) and the decompression valve opening 45(802e) are respectively connected with two end openings 41(802a) and 43(802c) of the sliding sleeve 4(801) Respectively connected with the decoder opening 47(801g) and the decoder opening 48(801h) in one-to-one correspondence; in the left end position operation state, the pressure relief valve opening 41(802a) is communicated with the pressure relief valve opening 44(802d), and the pressure relief valve opening 42(802b) is communicated with the pressure relief valve opening 45(802 e); in the right end position operation state, the relief valve opening 42(802b) communicates with the relief valve opening 44(802d), and the relief valve opening 43(802c) communicates with the relief valve opening 45(802 e). The pressure release valve 5(1002) is a hydraulic control type three-position five-way valve, the five ports are a pressure release valve opening 51(1002a), a pressure release valve opening 52(1002b), a pressure release valve opening 53(1002c), a pressure release valve opening 54(1002d) and a pressure release valve opening 55(1002e) respectively, a left return spring 51(1002f) is propped against the left end of the pressure release valve 5(1002), a right return spring 52(1002g) is propped against the right end of the pressure release valve 5(1002), the pressure release valve 5(1002) is further provided with two hydraulic control input ports, the two hydraulic control input ports are respectively connected with a decoder opening 57(1001g) and a decoder opening 58(1001h) of the decoder 5(1001) one-to-one, the pressure release valve opening 52(1002b) is connected with the oil pipe opening 5(1004) through a one-way valve 5(1004), the pressure release valve opening 54(1002d) and the pressure release valve opening 55(1002e) are respectively connected with two ports of a sliding sleeve 5(1003), the pressure relief valve opening 51(1002a) and the pressure relief valve opening 53(1002c) are connected in one-to-one correspondence with the decoder opening 57(1001g) and the decoder opening 58(1001h), respectively; in the left end position operating state, the relief valve opening 51(1002a) communicates with the relief valve opening 54(1002d), and the relief valve opening 52(1002b) communicates with the relief valve opening 55(1002 e); in the right end position operation state, the relief valve opening 52(1002b) communicates with the relief valve opening 54(1002d), and the relief valve opening 53(1002c) communicates with the relief valve opening 55(1002 e). The decompression valve 6(1202) is a hydraulic control type three-position five-way valve, five ports are respectively a decompression valve opening 61(1202a), a decompression valve opening 62(1202b), a decompression valve opening 63(1202c), a decompression valve opening 64(1202d) and a decompression valve opening 65(1202e), a left reset spring 61(1202f) is pressed against the left end of the decompression valve 6(1202), a right reset spring 62(1202g) is pressed against the right end of the decompression valve 6(1202), the decompression valve 6(1202) is also provided with two hydraulic control input ports which are respectively connected with a decoder opening 67(1201g) and a decoder opening 68(1201h) of the decoder 6(1201) in a one-to-one correspondence manner, the decompression valve opening 62(1202b) is connected with an oil pipe opening 6(1205) through a one-way valve 6(1204), the decompression valve opening 64 (d) and the decompression valve opening 65(1202e) are connected with two end openings of a sliding sleeve 6(1202) in a one-to one correspondence manner, the pressure-release valve openings 61(1202a) and 63(1202c) are connected in one-to-one correspondence with the decoder openings 67(1201g) and 68(1201h), respectively; in the left end position operation state, the relief valve opening 61(1202a) communicates with the relief valve opening 64(1202d), and the relief valve opening 62(1202b) communicates with the relief valve opening 65(1202 e); in the right end position operation state, the relief valve opening 62(1202b) communicates with the relief valve opening 64(1202d), and the relief valve opening 63(1202c) communicates with the relief valve opening 65(1202 e).
Taking the operation of the pressure relief valve 1(202) at the first level as an example, as shown in fig. 3, when the sliding sleeve 1(203) needs to be driven to displace to the right, the decoder 1 is firstly opened by controlling the oil pressure states of the three hydraulic pipelines, then, the decoder opening 17(201g) is raised to output 10MPa of oil pressure, so that the pressure relief valve 1(202) is switched to the left end position, at this time, the pressure relief valve opening 11(202a) is communicated with the pressure relief valve opening 14(202d), the pressure relief valve opening 12(202b) is communicated with the pressure relief valve opening 15(202e), then the oil in the decoder enters the inside of the sliding sleeve 1(203) through the decoder opening 17(201g), the pressure relief valve opening 11(202a) and the pressure relief valve opening 14(202d) to push the sliding sleeve to move rightwards, and during the displacement process of the sliding sleeve 1, the oil stored in the oil-filled relief valve flows into the wellbore through the relief valve opening 15(202e) and the relief valve opening 12(202 b). Similarly, when the sliding sleeve 1(203) needs to be driven to move leftward, the decoder 1 is firstly opened by controlling the oil pressure states of the three hydraulic pipelines, then 10MPa oil pressure is output by the lifting decoder opening 18(201h), so that the pressure release valve 1(202) is switched to the right end position, at this time, the pressure release valve opening 12(202b) is communicated with the pressure release valve opening 14(202d), the pressure release valve opening 13(202c) is communicated with the pressure release valve opening 15(202e), and then oil in the decoder enters the inside of the sliding sleeve 1(203) through the decoder opening 18(201h), the pressure release valve opening 13(202c) and the pressure release valve opening 15(202e), so as to push the sliding sleeve to move leftward, and in the moving process of the sliding sleeve 1, oil stored in the inside of the sliding sleeve flows into a shaft through the pressure release valve opening 14(202d) and the pressure release valve opening 12(202 b).
Example two
The structure of the decoder itself will be described in more detail with reference to fig. 10-14. The 6 decoders have the same structure, and specifically, the decoders comprise an upper connector (A1), an upper valve body (A2), a valve control lock sleeve (A3), a valve control lock ball (A4), an upper end return spring (A5), an upper valve core (A6), a sealing gasket (A7), a lower valve body (A8), a lower valve core (A9), a lower end return spring (A10) and a lower connector (A11).
Go up valve body (A2) and lower valve body (A8) and constitute the valve body wholly through the screw thread butt joint, go up the external port of piecing (A1) and last valve body (A2) and seal through threaded connection, the external port of lower clutch (A11) and lower valve body (A8) seals through threaded connection.
A first mounting cavity (the upper joint is provided with a reducing section, the first mounting cavity is formed between the reducing section and the inner cavity of the upper valve body) and is used for mounting the valve control lock sleeve (A3) is arranged between the upper joint (A1) and the upper valve body (A2), the inner end of the upper joint (A1) is provided with a second mounting cavity (the inner end of the upper joint is provided with an axial hole, the axial hole forms the second mounting cavity), the upper joint (A1) is further provided with a mounting channel (A1-1) used for mounting the valve control lock ball (A4), the bottom of the mounting channel is communicated with the second mounting cavity, and the top of the mounting channel is communicated with the first mounting cavity; the inner end of the lower joint (A11) is provided with a third mounting cavity for mounting a lower end return spring (A10).
The valve control lock sleeve (A3) is slidably mounted in a first mounting cavity between the upper joint (A1) and the upper valve body (A2).
The upper valve core (A6) and the lower valve core (A9) are butted to form a valve core whole body, the outer end of the upper valve core (A6) is slidably mounted in the second mounting cavity of the upper joint (A1), the outer end of the lower valve core (A9) is mounted with the lower end return spring mounted in the third mounting cavity of the lower joint (A11) in an acting mode, and the lower end return spring provides restoring force in the direction of the upper joint for the valve core.
The valve control locking ball (A4) is installed in an installation channel of the upper joint (A1), a first groove (A6-1) used for being matched with the valve control locking ball (A4) is arranged on the outer wall of the upper valve core (A6), and a second groove (A3-1) used for being matched with the valve control locking ball (4) is arranged on the inner wall of the valve control locking sleeve (A3); when the valve control lock ball (A4) is matched with the first groove of the upper valve core (A6), the valve core is in a locked state, and the whole valve core cannot move; and after the valve control lock ball (A4) upwards enters the second groove of the valve control lock sleeve, the valve core is in an unlocked state, and can move.
The decoder openings a, b, c, g, d, h, e, f are arranged in the entire valve body in the direction from the top connection (a1) to the bottom connection (a11), wherein the decoder openings a, b, c, g, d, h, e, f are arranged in the upper valve body, and the decoder openings a, b, e, f, g, h are arranged in the lower valve body, wherein the decoder openings a, c, d, e, f, g, h, etc. correspond to the decoder openings with the prefix 201, 401, 601, 801, 1001, 1201, etc. in each of the decoders of fig. 3 to 9. Furthermore, the decoder opening a is arranged above the valve control lock sleeve (A3), and the decoder opening a pushes the valve control lock sleeve (A3) to move rightwards after oil is injected; a sealing gasket (a7) is provided inside the valve body between the decoder opening b and the decoder opening c to isolate the decoder opening b from the decoder opening c.
The lower valve core (A9) is provided with a first plugging and expanding section (A9-1), a second plugging and expanding section (A9-2) and a third plugging and expanding section (A9-3), the first plugging and expanding section is arranged at the joint of the upper valve core (A6) and the lower valve core (A9) and is positioned between the decoder opening c and the decoder opening g, the effects of isolating the decoder opening c from the decoder opening g are achieved, the first plugging and expanding section is pushed to move rightwards after oil is injected from the decoder opening c, and then the first plugging and expanding section drives the whole valve core to move rightwards; the second plugging and expanding section is arranged between the decoder opening hole d and the decoder opening hole h, and plays a role in isolating the decoder opening hole d from the decoder opening hole h and plugging the decoder opening hole d; the third block expanding section is arranged between the decoder opening e and the decoder opening f and plays a role in isolating the decoder opening e from the decoder opening f and blocking the decoder opening e. Furthermore, the initial state (when unlocked) of the second plugging and expanding section is located at the opening d of the decoder, and the second plugging and expanding section is located between the opening d of the decoder and the opening h of the decoder after being unlocked; the initial state (when unlocked) of the third plugging expanding section is located at the decoder opening e, and the third plugging expanding section is located between the decoder opening e and the decoder opening f after being unlocked.
An upper end return spring (A5) for providing restoring force to the valve control lock sleeve (A3) in the direction of the upper joint is arranged in the valve body.
Furthermore, a limiting step (A2-1) for limiting the rightward movement position of the valve control lock sleeve (A3) is arranged on the inner wall of the upper valve body (A2).
The decoder works as follows:
in operation, the decoder bore c and the decoder bore d of the decoder are communicated, the decoder bore a and the decoder bore e are communicated, the decoder bore b and the decoder bore f are communicated, and the communicated openings are connected with different hydraulic lines. Firstly, introducing 5MPa low-pressure oil into one of the hydraulic pipelines, enabling the hydraulic oil to enter a decoder opening c and a decoder opening d, applying rightward pressure to a first plugging and expanding section on a lower valve core (A9) under the action of oil pressure injected from the decoder opening c to push the valve core to move rightwards, further applying pressure to a valve control locking ball (A4) by a first groove on an upper valve core (A6), and enabling the valve control locking ball (A4) to upwards prop against the inner wall of a valve control locking sleeve (A3); then, low-pressure oil with the pressure of 5MPa is introduced into the other hydraulic pipeline, hydraulic oil enters the decoder open hole a and the decoder open hole e, the valve control lock sleeve (A3) is pushed to move rightwards under the action of oil pressure injected from the decoder open hole a, when the second groove of the valve control lock sleeve (A3) corresponds to the valve control lock ball (A4), the valve control lock ball (A4) moves upwards under the action force given by the first groove of the upper valve core (A6), and then a part of the top of the valve control lock ball (A4) enters the second groove, so that the valve control lock ball (A4) is separated from the first groove, at the moment, the valve core loses the restraint of the valve control lock ball (A4) and moves rightwards, in the moving process, the second plugging expanding section on the valve core moves from the decoder open hole d to a position between the decoder open hole d and the decoder open hole h, the third plugging expanding section moves from the decoder open hole e to a position between the decoder open hole e and the decoder open hole f, the decoder is thus open, making the decoder opening d and the decoder opening g conductive, the decoder opening e and the decoder opening h conductive. When the decoder is reset, the hydraulic pipeline is emptied, the valve core is reset under the pushing of the lower end reset spring (A10), the valve control lock ball (A4) falls into the first groove of the upper valve core (A6) in the valve core reset process, at the moment, the valve control lock sleeve (A3) is unlocked, the valve control lock sleeve (A3) is pushed to reset under the action of the upper end reset spring (A5), and at the moment, the decoder reset is completed.
In addition, referring to fig. 14, when the valve control sleeve (A3) moves rightwards to reach the position of the limit step (a2-1), the position of the second groove (A3-1) on the valve control sleeve (A3) does not coincide with the position of the valve control lock ball (a4), and the valve control lock ball (a4) cannot enter the second groove after being stressed, which has the following functions: the distinctiveness of the sequential control of different hydraulic pipelines is ensured, so that three hydraulic pipelines can complete one-to-one control of 6 decoders. That is, the decoder is opened only when the hydraulic oil first enters the decoder opening c and the decoder opening d and then enters the decoder opening a and the decoder opening e, and if the hydraulic oil first enters the decoder opening a and the decoder opening e, the valve control sleeve (A3) is first pushed to the limit step position as shown in fig. 14, and since the second groove (A3-1) of the valve control sleeve (A3) does not coincide with the position of the valve control locking ball (a4), the valve control locking ball (a4) does not come off the second groove of the valve core upward and cannot be unlocked even if the hydraulic oil is subsequently supplied to the decoder opening c and the decoder opening d.
Claims (9)
1. A downhole decoder system, characterized by: the decompression valve is a hydraulic control type three-position five-way valve and comprises two hydraulic control input ports and five openings, two output ports of the decoder are respectively connected with the two hydraulic control input ports of the decompression valve in a one-to-one correspondence mode and used for controlling the end position operation state of the decompression valve, the two output ports of the decoder are also respectively connected with a first opening and a second opening of the decompression valve in a one-to-one correspondence mode and used for supplying oil to the decompression valve, a third opening and a fourth opening of the decompression valve are respectively connected with two ports of the sliding sleeve in a one-to-one correspondence mode, and a fifth opening of the decompression valve is connected with the oil pipe opening through the one-way valve; when the pressure relief valve is in a left end position operation state, the first opening and the third opening of the pressure relief valve are communicated, and the fourth opening and the fifth opening are communicated, so that the oil liquid pushes the sliding sleeve to move in the positive direction, and the oil liquid in the sliding sleeve enters the oil pipe through the fourth opening, the fifth opening and the one-way valve to form an opening; when the pressure release valve is in the right end position operation state, the second opening and the fourth opening of the pressure release valve are communicated, and the third opening and the fifth opening are communicated, so that the oil liquid pushes the sliding sleeve to perform reverse displacement, and the oil liquid in the sliding sleeve enters the oil pipe through the third opening, the fifth opening and the one-way valve to form an opening.
2. The downhole decoder system of claim 1, wherein: after the decoder is started, when the oil pressure output by the output port of the decoder is increased to the working pressure required by the sliding sleeve, the passages among the decoder, the pressure release valve, the sliding sleeve, the one-way valve and the oil pipe opening are communicated; the moving direction of the sliding sleeve is controlled by controlling the different output ports of the decoder to output oil pressure to the operating pressure required by the sliding sleeve.
3. The downhole decoder system of claim 1, wherein: the decoder is structurally characterized by comprising a valve body, a valve core, a valve control lock sleeve (A3), a valve control lock ball (A4), an upper end return spring (A5) and a lower end return spring (A10);
an upper joint (A1) and a lower joint (A11) are respectively installed at two ends of the valve body, the valve control lock sleeve (A3) is slidably installed in a first installation cavity between the upper joint (A1) and the valve body, the valve core is installed in the valve body, one end of the valve core is slidably installed in a second installation cavity of the upper joint (A1), the other end of the valve core is installed with a lower end return spring in an acting mode, and the lower end return spring provides restoring force for the valve core in the direction of the upper joint;
the valve control lock ball (A4) is arranged in an installation channel of the upper joint (A1), the bottom of the installation channel is communicated with the second installation cavity, and the top of the installation channel is communicated with the first installation cavity; a first groove (A6-1) used for being matched with the valve control lock ball (A4) is formed in the outer wall of the valve core, and a second groove (A3-1) used for being matched with the valve control lock ball (A4) is formed in the inner wall of the valve control lock sleeve (A3); when the valve control locking ball (A4) is matched with the first groove of the valve core, the valve core is in a locking state and cannot move; the valve control lock ball (A4) enters the second groove of the valve control lock sleeve upwards to be in an unlocking state, and the valve core can move;
the valve body is sequentially provided with a decoder opening a, a decoder opening b, a decoder opening c, a decoder opening g, a decoder opening d, a decoder opening h, a decoder opening e and a decoder opening f along the direction from the upper connector (A1) to the lower connector (A11), wherein the decoder opening g and the decoder opening h are two output ports of a decoder, the decoder opening a is arranged above the valve control lock sleeve (A3), and the decoder opening a pushes the valve control lock sleeve (A3) to move rightwards after oil is injected; a sealing gasket is arranged in the valve body between the decoder opening hole b and the decoder opening hole c to isolate the decoder opening hole b from the decoder opening hole c;
the valve core is provided with a first blocking and expanding section (A9-1), a second blocking and expanding section (A9-2) and a third blocking and expanding section (A9-3), the first blocking and expanding section is positioned between the decoder opening c and the decoder opening g, the effects of isolating the decoder opening c and the decoder opening g are achieved, oil is injected from the decoder opening c and then pushes the first blocking and expanding section to move rightwards, and the first blocking and expanding section drives the valve core to move; the second plugging and expanding section is arranged between the decoder opening hole d and the decoder opening hole h, and plays a role in isolating the decoder opening hole d from the decoder opening hole h and plugging the decoder opening hole d; the third plugging and expanding section is arranged between the decoder opening hole e and the decoder opening hole f, and plays a role in isolating the decoder opening hole e and the decoder opening hole f and plugging the decoder opening hole e;
an upper end return spring (A5) for providing restoring force to the valve control lock sleeve (A3) in the direction of the upper joint is arranged in the valve body.
4. The downhole decoder system of claim 3, wherein: and a limiting step (A2-1) for limiting the rightward movement position of the valve control lock sleeve (A3) is also arranged on the inner wall of the valve body.
5. The downhole decoder system of claim 3, wherein: the initial state of the second plugging and expanding section is positioned at the opening d of the decoder, and the second plugging and expanding section is positioned between the opening d of the decoder and the opening h of the decoder after being unlocked; the initial state of the third plugging expanding section is positioned at the opening e of the decoder, and the third plugging expanding section is positioned between the opening e of the decoder and the opening f of the decoder after being unlocked.
6. The downhole decoder system of claim 3, wherein: the upper joint of the decoder is provided with a reducing section, and a first mounting cavity is formed between the reducing section and the inner cavity of the valve body.
7. The downhole decoder system of claim 3, wherein: the inner end of the upper joint of the decoder is provided with an axial hole which forms a second mounting cavity.
8. The downhole decoder system of claim 3, wherein: the inner end of the lower joint (A11) of the decoder is provided with a third mounting cavity for mounting a lower end return spring (A10).
9. The downhole decoder system of claim 3, wherein: the valve core of the decoder is formed by butting an upper valve core (A6) and a lower valve core (A9).
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| CN114320230B (en) * | 2022-01-07 | 2023-08-01 | 东营市福利德石油科技开发有限责任公司 | Underground pressure control switch device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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