CN221074208U - Normally closed, two-stage and normally open sliding sleeve and sliding sleeve device - Google Patents
Normally closed, two-stage and normally open sliding sleeve and sliding sleeve device Download PDFInfo
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- CN221074208U CN221074208U CN202322293410.7U CN202322293410U CN221074208U CN 221074208 U CN221074208 U CN 221074208U CN 202322293410 U CN202322293410 U CN 202322293410U CN 221074208 U CN221074208 U CN 221074208U
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- 238000010008 shearing Methods 0.000 claims description 47
- 230000000149 penetrating effect Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000012533 medium component Substances 0.000 abstract description 8
- 239000000306 component Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 27
- 239000010959 steel Substances 0.000 description 27
- 238000010276 construction Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 230000020477 pH reduction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a normally closed, two-stage, normally open sliding sleeve and sliding sleeve device, which relate to the technical field of deep well exploitation equipment, and specifically relate to the normally closed, two-stage, normally open sliding sleeve and sliding sleeve device, wherein the sliding sleeve device respectively comprises a normally closed sliding sleeve, a two-stage sliding sleeve and a normally open sliding sleeve, the normally closed sliding sleeve is communicated with the two-stage sliding sleeve through at least one oil pipe, and the two-stage sliding sleeve is communicated with the normally open sliding sleeve through at least one oil pipe; extracting a mine bottom section medium by using a normally open sliding sleeve, so as to determine the components of the mine bottom section medium; extracting the medium of the middle and the outer sections of the mine by using the two-stage sliding sleeve, so as to realize the determination of the medium components of the middle and the outer sections of the mine; extracting the medium of the upper stage of the mine by using a normally closed sliding sleeve, so as to realize the determination of the medium components of the upper stage of the mine; the purpose of determining different stratum media in a grading manner for the mine is achieved, water can be effectively found for different strata, and the components of the different stratum media can be effectively and scientifically judged.
Description
Technical Field
The utility model relates to the technical field of deep well exploitation equipment, in particular to a normally closed, two-stage and normally open sliding sleeve and a sliding sleeve device.
Background
In China, many oil and gas ores are attenuated by formation energy in the later period of exploitation, and the formation needs to be subjected to separate fracturing, separate acidification and water injection to improve the formation energy and the single well yield. Meanwhile, before the transformation of an oil gas well or in the construction process, the oil layer casing is damaged to cause unqualified pressure test, and the condition that the next fracturing construction cannot be carried out can be avoided.
At present, the existing oil and gas well separate fracturing, separate acidification, water injection and leakage finding construction all adopt conventional packers under oil pipes for operation, the construction period is long, continuous construction cannot be performed, and certain construction risks are caused by pressure in the well. Therefore, a tool string capable of completing fracturing, layered acidification, water injection and leakage finding through continuous construction is urgently needed.
In published chinese patent application, bulletin numbers: CN211287654U, patent name: an oil and gas well continuous layering fracturing, acidizing, water injection and leakage finding tool pipe string can realize unlimited times of seat sealing and unsealing through the tool pipe string, seal different layers and perform water injection leakage finding and other constructions; but this prior art fails to determine whether media (water, oil, gas, etc.) is present in the various formations in the deep well.
Disclosure of utility model
(One) solving the technical problems
Aiming at the defects of the prior art, the utility model provides a normally closed, two-stage and normally open sliding sleeve and a sliding sleeve device, and solves the problems in the prior art.
(II) technical scheme
In order to achieve the above purpose, the utility model is realized by the following technical scheme: the normally closed sliding sleeve comprises a first lower joint, a first upper joint and a first shearing pin shaft, wherein middle holes penetrating up and down are formed in the middle of the first lower joint, the first upper joint and the first shearing pin shaft, one end of the first lower joint is fixedly arranged with one end of the first upper joint, and the first shearing pin shaft is inserted into the middle hole at the joint of the first lower joint and the first upper joint and can slide in the middle hole; the first upper joint is provided with a first shear pin for limiting the sliding of the first shear pin shaft, and one end of the first shear pin is inserted into the outer side wall of the first shear pin shaft; the side wall of the first upper joint is provided with a plurality of first side flow holes penetrating through the wall of the first upper joint.
Optionally, the outer side wall of the first shear pin shaft can block each first side flow hole when the first shear pin shaft does not slide, and the outer side wall of the first shear pin shaft cannot block each first side flow hole after the first shear pin shaft slides.
Optionally, the middle aperture of the first shear pin is smaller than the middle aperture of the first upper joint.
The two-stage sliding sleeve comprises a second upper joint, a second lower joint and an outer barrel, wherein two ends of the outer barrel are fixedly installed with the second upper joint and the second lower joint respectively; the inside of the outer cylinder is respectively provided with a second shearing pin shaft and a third shearing pin shaft in a sliding manner, the outer cylinder is respectively provided with a second shearing pin and a third shearing pin shaft, one end of the second shearing pin is inserted into the outer side wall of the second shearing pin shaft, and one end of the third shearing pin is inserted into the outer side wall of the third shearing pin shaft; the side wall of the outer cylinder is provided with a second side flow hole penetrating through the wall of the outer cylinder.
Optionally, the hole diameter of the inner hole of the second shear pin is larger than the hole diameter of the inner hole of the third shear pin.
Optionally, the outer side wall of the third shear pin shaft can block each second side flow hole when the third shear pin shaft does not slide, and the outer side wall of the third shear pin shaft cannot block each second side flow hole after the third shear pin shaft slides.
The utility model provides a normally open sliding sleeve, normally open sliding sleeve includes third lower clutch, third upper clutch, the one end fixed mounting of third lower clutch and the one end of third upper clutch, a plurality of third side flow holes that run through its wall have been seted up on the lateral wall of third lower clutch, the inside slip of third lower clutch is provided with fourth shear pin axle, be provided with fourth shear pin on the lateral wall of third lower clutch, the one end of fourth shear pin is inserted and is established on the lateral wall of fourth shear pin axle.
Optionally, the fourth shear pin shaft is capable of blocking each third side flow hole after sliding.
The sliding sleeve device comprises a normally closed sliding sleeve, a two-stage sliding sleeve and a normally open sliding sleeve, wherein the normally closed sliding sleeve is communicated with the two-stage sliding sleeve through at least one oil pipe, and the two-stage sliding sleeve is communicated with the normally open sliding sleeve through at least one oil pipe; and a Y111 packer is arranged on the oil pipe between the normally closed sliding sleeve and the two-stage sliding sleeve, and a Y221 packer is arranged on the oil pipe between the two-stage sliding sleeve and the normally open sliding sleeve.
(III) beneficial effects
The utility model provides a normally closed, two-stage and normally open sliding sleeve and a sliding sleeve device, which have the following beneficial effects:
According to the sliding sleeve device, through the matching arrangement of the normally closed sliding sleeve, the two-stage sliding sleeve, the normally open sliding sleeve, the Y111 packer and the Y221 packer, the sliding sleeve device has the effect of determining whether a medium exists in a deep well in a layering manner, and the Y111 packer and the Y221 packer are used for conducting layering partition on a mine so as to prevent the medium from flowing in the mine; extracting a mine bottom section medium by using a normally open sliding sleeve, so as to determine the components of the mine bottom section medium; extracting the medium of the middle and the outer sections of the mine by using the two-stage sliding sleeve, so as to realize the determination of the medium components of the middle and the outer sections of the mine; extracting the medium of the upper stage of the mine by using a normally closed sliding sleeve, so as to realize the determination of the medium components of the upper stage of the mine; the purpose of determining different stratum media in a grading manner for the mine is achieved, water (gas, oil and other media) can be effectively found for different strata, and the components of the different stratum media can be effectively and scientifically judged.
Drawings
FIG. 1 is a schematic cross-sectional view of a normally closed sliding sleeve according to the present utility model;
FIG. 2 is a schematic cross-sectional view of a dual stage runner of the present utility model;
FIG. 3 is a schematic cross-sectional view of a normally open sliding sleeve according to the present utility model;
Fig. 4 is a schematic view of an underground arrangement structure of a sliding sleeve device according to the present utility model.
In the figure: 1. normally closed sliding sleeve; 101. a first lower joint; 102. a first upper joint; 103. a first shear pin; 104. a first shear pin; 105. a first side flow aperture; 106. a first shock pad; 107. a first seal ring; 108. a second seal ring; 2. a two-stage sliding sleeve; 201. a second lower joint; 202. a second upper joint; 203. an outer cylinder; 204. a third seal ring; 205. a fourth seal ring; 206. the second shearing pin shaft; 207. a second shear pin; 208. a fifth seal ring; 209. a second side flow aperture; 210. a third shear pin; 211. a third shear pin; 3. a normally open sliding sleeve; 301. a third lower joint; 302. a third upper joint; 303. a sixth seal ring; 304. a seventh seal ring; 305. a fourth shear pin; 306. fourth shear pins; 307. a third side flow aperture; 4. a fourth steel ball; 5. a third steel ball; 6. a second steel ball; 7. a first steel ball; 8. a Y111 packer; 9. a Y221 packer; 10. and (5) guiding the plug.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Description: the normally closed sliding sleeve 1, the two-stage sliding sleeve 2 and the normally open sliding sleeve 3 shown in fig. 1, 2 and 3 are installed vertically in practical implementation, the upper joint is located above in a mine, the lower joint is located below, and the steel balls fall from the side where the upper joint is located to the side where the lower joint is located.
Referring to fig. 1 to 4, the present utility model provides the following technical solutions: the sliding sleeve device comprises a normally closed sliding sleeve 1, a two-stage sliding sleeve 2 and a normally open sliding sleeve 3, wherein the normally closed sliding sleeve 1 is communicated with the two-stage sliding sleeve 2 through at least one oil pipe, and the two-stage sliding sleeve 2 is communicated with the normally open sliding sleeve 3 through at least one oil pipe; and a Y111 packer is arranged on the oil pipe between the normally closed sliding sleeve 1 and the double-stage sliding sleeve 2, and a Y221 packer is arranged on the oil pipe between the double-stage sliding sleeve 2 and the normally open sliding sleeve 3.
The sliding sleeve device disclosed by the application is matched with the existing ground equipment of the mine area. The guide plug 10 (the existing equipment is not repeated), the normally open sliding sleeve 3, the Y221 packer 9, the two-stage sliding sleeve 2, the Y111 packer 8, the normally closed sliding sleeve 1 and the plurality of oil pipes are sequentially installed (refer to fig. 4), and the installed pipe string (pipe column) is arranged at a position in a mine. The Y221 packer 9 and the Y111 packer 8 are set by lifting, rotating and lowering the tubular column by using ground equipment, and the annular control pressure of the upper and lower tubular columns outside the tubular column is blocked by using the packer (referred to as the Y221 packer 9 and the Y111 packer 8). Under the action of the Y221 packer 9 and the Y111 packer 8, the medium in the mine and positioned outside the pipe column is divided into three layers, namely a lower layer, a middle layer and an upper layer, the medium of the three layers cannot flow in the mine, and the phenomenon that medium components of all layers cannot be determined due to medium aggregation caused by medium up-down flow is avoided.
Through the matching arrangement of the normally closed sliding sleeve 1, the double-stage sliding sleeve 2, the normally open sliding sleeve 3, the Y111 packer 8 and the Y221 packer 9, the sliding sleeve device has the effect of determining whether a medium exists in a deep well in a layering manner, and the Y111 packer 8 and the Y221 packer 9 are used for conducting layering partition on a mine so as to prevent the medium from flowing in the mine; extracting a mine bottom section medium by using a normally open sliding sleeve 3, so as to realize the determination of the mine bottom section medium components; extracting the medium of the middle and the outer sections of the mine by using the double-stage sliding sleeve 2, so as to realize the determination of the medium components of the middle and the outer sections of the mine; extracting the medium of the upper stage of the mine by using the normally closed sliding sleeve 1, so as to realize the determination of the medium components of the upper stage of the mine; the purpose of determining different stratum media in a grading manner for the mine is achieved, water (gas, oil and other media) can be effectively found for different strata, and the components of the different stratum media can be effectively and scientifically judged.
The normally open sliding sleeve 3 comprises a third lower joint 301 and a third upper joint 302, one end of the third lower joint 301 and one end of the third upper joint 302 are fixedly installed, a plurality of third side flow holes 307 penetrating through the wall of the third lower joint 301 are formed in the side wall of the third lower joint 301, a fourth shear pin 305 is slidably arranged in the third lower joint 301, a fourth shear pin 306 is arranged on the side wall of the third lower joint 301, and one end of the fourth shear pin 306 is inserted into the outer side wall of the fourth shear pin 305.
The fourth shear pin 305 is capable of blocking each third side flow hole 307 after sliding. Wherein, the connection of the third upper joint 302 and the third lower joint 301 is provided with a sixth sealing ring 303. A seventh sealing ring 304 is arranged at the abutting position of the fourth shearing pin shaft 305 and the third lower joint 301.
Wherein, the normally open sliding sleeve 3 is in a normally open state in the well logging process, and the third side flow hole 307 is in a normally open state. When the normally open sliding sleeve 3 reaches the bottom of the well, the well medium flows into the pipe string through each third side flow hole 307, and the medium in the pipe string is extracted by the surface equipment. When the normally open sliding sleeve 3 needs to be closed, a worker loses the first steel ball 7 from the wellhead to the inside of the pipe column, the first steel ball 7 falls down and is blocked at the port of the fourth shearing pin shaft 305 of the normally open sliding sleeve 3, the inside of the pipe column is pressurized by using ground equipment, the first steel ball 7 moves down under high pressure, and the first steel ball 7 moves down and pushes the fourth shearing pin shaft 305 to move down. The fourth shear pin 305 moves downward to cut off the fourth shear pin 306, and the fourth shear pin 306 no longer limits the fourth shear pin 305. The fourth shear pin 305 slides down and blocks the third side flow hole 307. The normally open sliding sleeve 3 is used for extracting the medium of the lower layer in the well by using surface equipment.
The double-stage sliding sleeve 2 comprises a second upper joint 202, a second lower joint 201 and an outer cylinder 203 respectively, and two ends of the outer cylinder 203 are fixedly installed with the second upper joint 202 and the second lower joint 201 respectively; the inside of the outer cylinder 203 is respectively provided with a second shearing pin shaft 206 and a third shearing pin shaft 210 in a sliding manner, the outer cylinder 203 is respectively provided with a second shearing pin 207 and a third shearing pin 211, one end of the second shearing pin 207 is inserted on the outer side wall of the second shearing pin shaft 206, and one end of the third shearing pin 211 is inserted on the outer side wall of the third shearing pin shaft 210; the side wall of the outer cylinder 203 is provided with a second side flow hole 209 penetrating the wall thereof.
Specifically, the bore diameter of the second shear pin 206 is greater than the bore diameter of the third shear pin 210.
Specifically, the outer side wall of the third shear pin 210 can block each of the second side flow holes 209 when no sliding occurs, and the outer side wall of the third shear pin 210 cannot block each of the second side flow holes 209 after sliding occurs. Wherein, the junction of second top connection 202 and urceolus 203 is provided with third sealing washer 204. A fourth seal ring 205 is provided at a contact point between the outer cylinder 203 and the second shear pin 206. A fifth seal ring 208 is provided at the contact point between the outer tube 203 and the third shear pin 210.
Wherein, the two-stage sliding sleeve 2 can realize the opening and closing of the second lateral flow hole 209. When the two-stage sliding sleeve needs to be opened, a worker loses the second steel ball 6 into the tubular column from the wellhead, and the second steel ball 6 falls into the tubular column and is blocked at the upper end port of the third shear pin 210 of the two-stage sliding sleeve 2 (the diameter of the second steel ball 6 is larger than the aperture of the third shear pin 210). The wellhead equipment applies pressure to the inside of the pipe column, the pressure in the pipe column and above the second steel ball 6 is increased, and the pressure pushes the second steel ball 6 to move downwards. The second steel ball 6 pushes the third shear pin 210 downward. The third shear pin 210 slides downward and cuts off the third shear pin 211, the third shear pin 211 is no longer limited, and the third shear pin 210 does not block the second side flow hole 209 after sliding downward. The medium outside the column enters the interior of the column through the second side flow hole 209, and then the medium inside the column is extracted by using the surface equipment.
When the double-stage sliding sleeve needs to be closed, a worker loses the third steel ball 5 into the pipe column from the wellhead, the third steel ball 5 falls off and is blocked at the port of the second shearing pin shaft 206 of the double-stage sliding sleeve 2 (the diameter of the third steel ball 5 is larger than the middle hole diameter of the second shearing pin shaft 206), the ground equipment is used for pressing the inside of the pipe column, the third steel ball 5 moves downwards after the pressure is applied, and the third steel ball 5 moves downwards and pushes the second shearing pin shaft 206 to move downwards. The second shear pin 206 moves down to sever the second shear pin 207, and the second shear pin 207 no longer positions the second shear pin 206. The second shear pin 206 slides down and blocks each second side flow hole 209. The two-stage sliding sleeve 2 is used for extracting medium of a middle stage layer in the well by using surface equipment.
The normally closed sliding sleeve 1 comprises a first lower joint 101, a first upper joint 102 and a first shearing pin shaft 103, wherein middle holes penetrating up and down are formed in the middle parts of the first lower joint 101, the first upper joint 102 and the first shearing pin shaft 103, one end of the first lower joint 101 is fixedly arranged with one end of the first upper joint 102, and the first shearing pin shaft 103 is inserted into the middle hole at the joint of the first lower joint 101 and the first upper joint 102 and can slide in the middle hole; the first upper joint 102 is provided with a first shear pin 104 for limiting the sliding of the first shear pin 103, and one end of the first shear pin 104 is inserted into the outer side wall of the first shear pin 103; the side wall of the first upper joint 102 is provided with a plurality of first side flow holes 105 penetrating through the wall thereof.
Specifically, the outer side wall of the first shear pin 103 can block each first side flow hole 105 when no sliding occurs, and the outer side wall of the first shear pin 103 cannot block each first side flow hole 105 after sliding occurs.
Specifically, the middle aperture of the first shear pin 103 is smaller than the middle aperture of the first upper joint 102. Wherein, the joint of first top connection 102 and first shear pin 103 is provided with second sealing washer 108. The junction of the first upper joint 102 and the first lower joint 101 is provided with a first sealing ring 107. A first shock pad 106 is provided between the first lower joint 101 and the first shear pin 103.
The normally closed sliding sleeve 1 is in a normally closed state under the condition that a steel ball is not placed in the normally closed sliding sleeve and pressure is applied, namely the first side flow hole 105 is in a closed state. When the first side flow hole 105 needs to be opened, a worker drops the fourth steel ball 4 into the pipe column from the wellhead, the fourth steel ball 4 blocks the middle channel of the pipe column, meanwhile, the fourth steel ball 4 is clamped on the first shear pin 103 (the diameter of the fourth steel ball 4 is larger than the middle hole diameter of the first shear pin 103), then the pipe column is pressurized (air pressure) at the wellhead, the air pressure in the pipe column is increased and pushes the fourth steel ball 4 to move downwards, the fourth steel ball 4 applies thrust to the first shear pin 103, the first shear pin 103 slides downwards and cuts off the first shear pin 104, the first shear pin 104 breaks, the first shear pin 104 does not limit the first shear pin 103 any more, and the first shear pin 103 slides downwards. The first shear pin 103 slides downward to thereby not block each of the first side flow holes 105. The medium (gas, water, oil, etc.) outside the string flows into the interior of the string through each of the first side flow holes 105, and the surface equipment extracts the medium inside the string. The normally closed sliding sleeve 1 is used for extracting medium of an upper layer in a well by using surface equipment.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (1)
1. A sliding sleeve device, characterized in that: the device comprises a normally closed sliding sleeve (1), a two-stage sliding sleeve (2) and a normally open sliding sleeve (3), wherein the normally closed sliding sleeve (1) is communicated with the two-stage sliding sleeve (2) through at least one oil pipe, and the two-stage sliding sleeve (2) is communicated with the normally open sliding sleeve (3) through at least one oil pipe; a Y111 packer (8) is arranged on the oil pipe between the normally closed sliding sleeve (1) and the two-stage sliding sleeve (2), and a Y221 packer (9) is arranged on the oil pipe between the two-stage sliding sleeve (2) and the normally open sliding sleeve (3);
The normally closed sliding sleeve (1) comprises a first lower joint (101), a first upper joint (102) and a first shearing pin shaft (103) respectively, wherein middle holes penetrating up and down are formed in the middle parts of the first lower joint (101), the first upper joint (102) and the first shearing pin shaft (103), one end of the first lower joint (101) is fixedly arranged with one end of the first upper joint (102), and the first shearing pin shaft (103) is inserted into a middle hole at the joint of the first lower joint (101) and the first upper joint (102) and can slide in the middle hole; the first upper joint (102) is provided with a first shear pin (104) for limiting the sliding of the first shear pin shaft (103), and one end of the first shear pin (104) is inserted into the outer side wall of the first shear pin shaft (103); the side wall of the first upper joint (102) is provided with a plurality of first side flow holes (105) penetrating through the wall of the first upper joint; the outer side wall of the first shearing pin shaft (103) can block each first side flow hole (105) when the first shearing pin shaft (103) does not slide, and the outer side wall of the first shearing pin shaft (103) cannot block each first side flow hole (105) after the first shearing pin shaft slides; the aperture of the middle part of the first shearing pin shaft (103) is smaller than the middle hole of the first upper joint (102);
The two-stage sliding sleeve (2) comprises a second upper joint (202), a second lower joint (201) and an outer cylinder (203) respectively, and two ends of the outer cylinder (203) are fixedly installed with the second upper joint (202) and the second lower joint (201) respectively; the inside of the outer cylinder (203) is respectively provided with a second shearing pin shaft (206) and a third shearing pin shaft (210) in a sliding manner, the outer cylinder (203) is respectively provided with a second shearing pin (207) and a third shearing pin (211), one end of the second shearing pin (207) is inserted into the outer side wall of the second shearing pin shaft (206), and one end of the third shearing pin (211) is inserted into the outer side wall of the third shearing pin shaft (210); a second side flow hole (209) penetrating through the wall of the outer cylinder (203) is formed in the side wall of the outer cylinder; the bore diameter of the second shearing pin shaft (206) is larger than that of the third shearing pin shaft (210); the outer side wall of the third shear pin shaft (210) can block each second side flow hole (209) when the third shear pin shaft (210) does not slide, and the outer side wall of the third shear pin shaft (210) cannot block each second side flow hole (209) after the third shear pin shaft slides;
the normally open sliding sleeve (3) comprises a third lower joint (301) and a third upper joint (302), one end of the third lower joint (301) and one end of the third upper joint (302) are fixedly installed, a plurality of third side flow holes (307) penetrating through the wall of the third lower joint (301) are formed in the side wall of the third lower joint (301), a fourth shear pin shaft (305) is slidably arranged in the third lower joint (301), a fourth shear pin (306) is arranged on the side wall of the third lower joint (301), and one end of the fourth shear pin (306) is inserted into the outer side wall of the fourth shear pin shaft (305); the fourth shear pin (305) can block each third side flow hole (307) after sliding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322293410.7U CN221074208U (en) | 2023-08-25 | 2023-08-25 | Normally closed, two-stage and normally open sliding sleeve and sliding sleeve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322293410.7U CN221074208U (en) | 2023-08-25 | 2023-08-25 | Normally closed, two-stage and normally open sliding sleeve and sliding sleeve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221074208U true CN221074208U (en) | 2024-06-04 |
Family
ID=91265332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322293410.7U Active CN221074208U (en) | 2023-08-25 | 2023-08-25 | Normally closed, two-stage and normally open sliding sleeve and sliding sleeve device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221074208U (en) |
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2023
- 2023-08-25 CN CN202322293410.7U patent/CN221074208U/en active Active
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