CN113898315A - Unlimited-level switchable full-bore sliding sleeve assembly - Google Patents
Unlimited-level switchable full-bore sliding sleeve assembly Download PDFInfo
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- CN113898315A CN113898315A CN202111489377.4A CN202111489377A CN113898315A CN 113898315 A CN113898315 A CN 113898315A CN 202111489377 A CN202111489377 A CN 202111489377A CN 113898315 A CN113898315 A CN 113898315A
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- sliding sleeve
- sliding
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- elastic element
- sliding ring
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- 239000012530 fluid Substances 0.000 claims description 20
- 238000005553 drilling Methods 0.000 claims description 18
- 210000000078 claw Anatomy 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
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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)
- Earth Drilling (AREA)
Abstract
The invention discloses an infinite-stage switchable full-bore sliding sleeve assembly which comprises a sliding sleeve tool and an opening tool, wherein the sliding sleeve tool comprises a sliding sleeve barrel; an expanding section with the inner diameter larger than that of the connecting section is arranged in the sliding sleeve body, a sliding ring is fixed in the expanding section through a cuttable pin A, the sliding ring closes the jet hole after the fixing, and an annular cavity A is formed by the sliding ring and the upper end of the expanding section; the elastic element A is used for pushing the sliding ring to press the first surface at the upper end of the diameter expanding section and seal the jet hole; the opening tool comprises a tool cylinder, the upper part of the tool cylinder is provided with a clamping jaw, the elastic element B pushes the clamping jaw to radially extend outwards, and the clamping jaw can extend into the cavity A; according to the invention, the cavity A and the shape and size of the jaw are set, so that the jaw can be extruded out of the cavity A and move downwards along the axial direction of the sliding ring after the elastic element A drives the sliding ring to move upwards. According to the invention, a plurality of sliding sleeve tools are opened in sequence by the same opening tool, the sliding sleeves of all fracturing sections can be arranged in an equal diameter manner, and the fracturing stages are not limited.
Description
Technical Field
The invention relates to the technical field of oil and gas field exploitation equipment, in particular to an infinite switchable full-bore sliding sleeve assembly.
Background
At present, multistage open hole packer adds sliding sleeve has become the common well completion mode of shale gas horizontal well, its fracturing string adopts multistage bowling sliding sleeve, an oil reservoir in the pit is corresponded to every level of sliding sleeve, the interior latus rectum of bowling sliding sleeve at all levels from bottom to top from little grow, during the use, drop into in the tubular column and slide sleeve and change the steel ball of level sliding sleeve ball seat matching/compound ball and block the passageway that the fluid flows to next oil reservoir in the drilling string, then promote the ball seat through to the drilling fluid pressurization and slide in the tubular column and expose the jet orifice, open the sliding sleeve promptly, high-pressure drilling fluid high-speed blowout is fractured the stratum at last. This formula requires that there is the range in the diameter of the steel ball of multistage sliding sleeve/compound ball, and this has restricted the improvement of fracturing progression, and the ball seat of sliding sleeve at different levels produces the throttle effect to the drilling fluid moreover, leads to the drilling fluid power reduction of deep oil reservoir, influences the flow, and in addition, this throttle effect leads to deep oil reservoir drilling fluid pressure not enough when we use water conservancy efflux to seal the technique, seriously influences the fracturing effect. Therefore, it is necessary to develop a drift diameter sliding sleeve assembly, which is used to make the sliding sleeve of each fracturing segment have the same diameter.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides an infinite-stage switchable full-bore sliding sleeve assembly, when the infinite-stage switchable full-bore sliding sleeve assembly is used, the sliding sleeves of all fracturing sections are in the same diameter, and the fracturing stages are not limited.
The specific scheme of the invention is as follows:
an infinite-stage switchable full-bore sliding sleeve assembly comprises a sliding sleeve tool and an opening tool, and is characterized in that the sliding sleeve tool comprises a sliding sleeve body and an elastic element A, and the upper end and the lower end of the sliding sleeve body are provided with connecting sections for connecting with a tubular column; an expanding section is arranged in the sliding sleeve body, the inner diameter of the expanding section is larger than that of the connecting section, and a first surface is arranged at the upper end of the expanding section; the diameter-expanding section is provided with a jet hole penetrating through the body and used for fracturing the stratum by fluid; a sliding ring is coaxially sleeved in the diameter expanding section, the sliding ring is connected with the diameter expanding section through a cuttable pin A, and after the sliding ring is connected, the sliding ring closes the jet hole, and an annular cavity A is formed between the sliding ring and the first surface at the upper end of the diameter expanding section and can accommodate a clamping jaw; the elastic element A is used for pushing the sliding ring to move and tightly press the first surface at the upper end of the diameter expanding section and seal the jet hole; the sliding ring is a soluble ring;
the opening tool comprises a tool cylinder body, the tool cylinder body and the sliding sleeve body are coaxially arranged and can axially move along the sliding sleeve body; the outer wall of the tool cylinder body is provided with a rubber ring for plugging an annular gap between the tool cylinder body and the sliding sleeve body; the upper part of the tool cylinder is radially provided with a telescopic jaw structure, the telescopic jaw structure comprises a jaw and an elastic element B, the elastic element B pushes the jaw to radially extend outwards, and the jaw can extend into the cavity A; the upper part of one end of the clamping jaw, which is opposite to the inner wall of the sliding sleeve cylinder, is a third surface, the third surface is an inclined surface, and the end surface of one end of the sliding ring, which is opposite to the first surface, is a second surface; along the instrument barrel footpath, the height of third face is greater than the height of first face, and the height of second face is not more than the height of first face for elastic element A drives the slip ring and moves up the back jack catch and can be extruded cavity A and can follow the slip ring axle and move down to next stage sliding sleeve instrument.
When the assembly is used, a plurality of sliding sleeve tools are connected with a pipe column at intervals and then are put into a stratum, then the opening tools are sent into the pipe column and added with drilling fluid to push the opening tools to move downwards in the pipe column, the clamping jaws slide along the inner wall of the pipe column under the action of the elastic element B, when the clamping jaws enter the cavity A, the sliding rings are clamped and pushed to cut off the cuttable pin A and then move downwards together, so that jet orifices are exposed, then the drilling fluid performs water conservancy jet flow packing fracturing on the stratum through the jet orifices, after the fracturing of the section is finished, the drilling fluid is removed, the sliding rings move upwards under the action of the elastic element A and finally extrude the clamping jaws out of the cavity A and plug the jet orifices, the clamping jaws pressurize the drilling fluid after being extruded out of the cavity A, and continuously slide downwards along the inner wall of the sliding rings to a next-stage sliding sleeve tool. And after the pressure-equalizing fracturing of all the stratum sections is finished and the slip rings are dissolved, the formal oil recovery is started.
For the invention, one function of the elastic element A is to reset the sliding ring to move upwards, however, in the fracturing process, the drilling fluid pressure fluctuates, the sliding ring can reciprocate and wear under the action of the elastic element A, the later stage sealing of the jet hole cannot be influenced when the wear loss is small, and once the wear loss reaches a certain degree to influence the sealing of the jet hole, the later stage fracturing can have the problem of liquid leakage, and the next stage fracturing effect can be influenced. Therefore, an improved form is provided, wherein a cuttable pin B is arranged at the diameter expansion section and is positioned below the cuttable pin A and used for locking the elastic element A in a compression state, the cutting force of the cuttable pin B is larger than the force of the drilling fluid on the cuttable pin B during the formation fracturing operation, and after the fracturing of the section is finished, the drilling fluid is further improved to fracture the cuttable pin B, and the elastic element A pushes the sliding ring to move upwards after recovering to be free.
The elastic element A can not block the jaw from axially moving downwards, otherwise, the opening tool can not smoothly move downwards to a next-stage sliding sleeve tool, the specific arrangement mode can be selected according to requirements, as a specific implementation mode of the invention, the elastic element A and the sliding ring are coaxially arranged, and the jaw can axially slide downwards along the inner walls of the sliding ring and the elastic element after the elastic element A is contacted with the sliding ring. The specific implementation manner is various, for example, the elastic element a is a rubber ring with a smooth inner wall, and the inner diameter of the elastic element a is not greater than the inner diameter of the port at the lower end of the sliding ring. For another example, the elastic element a is a spring, a ring-shaped element with a light ring on the inner wall is arranged in the spring, the upper end of the ring-shaped element is fixed with the upper end of the spring, the inner diameter of the ring-shaped element is not larger than the inner diameter of the port at the lower end of the sliding ring, and the other end of the ring-shaped element is positioned in the connecting section of the lower section when the spring is fully extended. The invention also provides another structure: the lower end of the sliding ring is fixedly connected with an annular tail, the sliding ring is smoothly connected with the inner wall of the annular tail, the outer diameter of the annular tail is smaller than the inner diameter of the diameter expanding section, the other end of the annular tail is located in the connecting section when the elastic element A is fully extended, and the elastic element A is located in an annular cavity between the annular tail and the diameter expanding section.
For the present invention, one function of the rubber on the outer wall of the tool cylinder is to block the annular gap between the tool cylinder and the sliding sleeve cylinder, and there are many specific blocking modes, and it is common knowledge in the art, for example, a hinged batch-opening sliding sleeve opening tool and an equal-diameter sleeve sliding sleeve disclosed in CN201610342186 adopt a rubber block, and certainly, for the sake of simplicity, we can also adopt a leather cup on a pipe cleaner, which can ensure that the opening tool can move along the normal axial direction of the pipe string.
As a specific embodiment of the present invention, the plurality of jet holes are provided, and the plurality of jet holes are uniformly distributed around the circumference of the sliding sleeve body.
As an embodiment of the present invention, there are a plurality of the retractable jaw structures, and the plurality of retractable jaw structures are uniformly distributed around the circumference of the tool cylinder.
Compared with the prior art, the invention has the following advantages:
(1) according to the invention, the plurality of sliding sleeve tools are opened in sequence by the same opening tool, so that the sliding sleeves of all fracturing sections can be arranged in an equal diameter manner, and the fracturing stages are not limited.
(2) The invention sequentially fractures each fracturing layer section from top to bottom, and for each section of fractured stratum, the slip ring in the slip sleeve tool can reset to close the jet hole after fracturing, so that the flow of the next stage of fracturing can not be influenced.
Drawings
FIG. 1 is a half sectional view of the sliding sleeve assembly of the present embodiment;
FIG. 2 is a cross-sectional view of the slip tool of the present embodiment;
FIG. 3 is an enlarged view of a portion of the portion A-A of FIG. 2;
FIG. 4 is a half sectional view of the sliding sleeve body of the present embodiment;
FIG. 5 is a schematic half-sectional view of the slip ring and annular tail of the present embodiment;
fig. 6 is a sectional view of the opener of the present embodiment;
FIG. 7 is an enlarged view of portion B-B of FIG. 6;
FIG. 8 is a schematic view showing the opening tool of the sliding sleeve assembly of the present embodiment moved axially downward in the connecting section;
FIG. 9 is a schematic view showing the opening tool of the sliding sleeve assembly of the present embodiment pushing the slider to move axially downward;
FIG. 10 is a schematic view of a fractured condition of the sliding sleeve assembly of the present embodiment;
fig. 11 is a schematic view showing the state that the sliding ring of the sliding sleeve assembly of the present embodiment moves upward to push the jaws out of the cavities a.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
In the description of the present invention, it is to be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and should not be construed as limiting the present invention.
Examples
Referring to fig. 1, fig. 1 is a half sectional view of the sliding sleeve assembly of the present embodiment. The utility model provides a full latus rectum sliding sleeve subassembly of unlimited level switch, includes sliding sleeve instrument 1 and opener 2, opener 2 coaxial set up in sliding sleeve instrument 1 and can follow sliding sleeve instrument 1 axial displacement, opener 2 is used for opening sliding sleeve instrument 1.
Referring further to fig. 2-5, fig. 2 is a sectional view of the sliding sleeve tool, fig. 3 is a partial enlarged view of a portion a-a in fig. 2,
fig. 4 is a half sectional view of the slider body, and fig. 5 is a half sectional view of the slider ring and the annular tail.
The sliding sleeve tool 1 includes a sliding sleeve body 11, a sliding ring 12, and an elastic member a 13. The sliding sleeve barrel 11 comprises a connecting section 111 and an expanding section 112, the connecting section 111 is located at two ends of the expanding section 112 and is used for being in threaded connection with a pipe column at the upper part and the lower part, the inner diameter of the expanding section 112 is larger than that of the connecting section 111, a first surface 1121 is arranged at the upper end of the expanding section 111, a fourth surface 1122 is arranged at the lower end of the expanding section 111, and the first surface 1121 and the fourth surface 1122 are vertical surfaces (parallel to the circumferential surface of the sliding sleeve barrel). The diameter expanding section 112 is provided with a jet hole 1123, a cuttable pin A1124 and a cuttable pin B1125 in sequence from top to bottom; the jet holes 1123 are through holes penetrating through the sliding sleeve barrel 11 body and used for fracturing the formation after fluid passes through the through holes, the number of the jet holes can be adjusted according to needs, and a plurality of jet holes 1123 are uniformly distributed around the circumferential plane of the sliding sleeve barrel 11 and can be arranged into one circle or a plurality of circles as shown in fig. 3; the sliding ring 12 is coaxially sleeved in the diameter expanding section 112, the outer wall of the sliding ring 12 presses the inner wall of the sliding sleeve barrel 11, the cutting pin a1124 is used for fixing the sliding ring 12 in the diameter expanding section 112, and the sliding ring 12 closes the jet hole 1123 after fixing, and certainly, in order to enhance the sealing performance after closing, a sealing ring (not shown) is arranged on the outer wall of the sliding ring. The lower end of the sliding ring 12 is further coaxially and fixedly connected with an annular tail 14, the inner walls of the sliding ring 12 and the annular tail 14 are smoothly connected (the inner diameters of the two are equal), the outer diameter of the annular tail 14 is smaller than that of the sliding ring 12, so that a link step exists on the outer wall after the two are connected, the link step is used for cutting off the cuttable pin B1125 at the later stage and serves as a force application point for the elastic element A13 to push the sliding ring 12 to move upwards, and when the sliding ring 12 moves in the diameter expanding section 111 in a reciprocating mode, the lower end of the annular tail 14 is always located in the connecting section 111. The end surface of the upper end of the sliding ring 12 is a second surface 121 and is also a vertical surface; when the cutting section pin a1123 fixes the sliding ring 12 in the expanding section 112, the first surface 1121, the second surface 121, and the sliding sleeve body 11 enclose an annular cavity, which is referred to as a cavity a 15. The elastic element a13 is located outside the annular tail 14 between the severable pin B1125 and the fourth face 1122, the severable pin B1125 serving to lock the elastic element a13 in a compressed state. After the cutting pin B1125 is cut, the elastic element a13 returns to push the sliding ring to move upward, and finally the upper end of the sliding ring 12 is pressed into contact with the upper end of the expanded diameter section 112, i.e. the first surface 1121 is in contact with the second surface 121, and the cavity a15 is not existed any more. Further, the slip ring 12 is a dissolvable ring. As for how to realize dissolubility, the person in the art can select dissolubility materials such as aluminum according to needs, inject a solvent to dissolve in the later period, and can also adopt other dissolubility materials to automatically dissolve after a certain time.
Referring to fig. 6 to 7, fig. 6 is a sectional view of the opener, and fig. 7 is an enlarged view of a portion B-B of fig. 6.
The opening tool 2 comprises a tool cylinder 21, the tool cylinder 21 is of an annular structure with a closed top opening, a plurality of rubber rings 22 are arranged on the outer wall of the tool cylinder 21 in series and used for blocking an annular gap between the tool cylinder 21 and the sliding sleeve body 11, and in order to enhance the sealing effect, an elastic element C23 is further arranged on the outer wall of the tool cylinder 21 and used for axially pressing the rubber rings 22 so that the rubber rings can radially expand to contact and press the inner wall of a pipe column/connecting section.
The upper part of the tool cylinder body 21 is radially provided with a telescopic claw structure 24, the telescopic claw structure 24 comprises claws 241 and an elastic element B242, the elastic element B242 pushes the claws 241 to extend radially outwards, and the claws 241 can extend into the cavities a15 after being fully extended, so as to clamp the upper end surface (i.e. the second surface 121) of the sliding ring 12, so that the opening tool can push the sliding ring 12 to move axially downwards; the upper part of the claw 241, which is opposite to one end of the inner wall of the sliding sleeve barrel 11, is a third surface 2411, and the third surface is an inclined surface; along the radial direction of the tool cylinder 21, the height of the third surface 2411 is greater than that of the first surface 1121, and the height of the second surface 121 is less than that of the first surface 1121, so that the elastic element a13 drives the sliding ring 12 to move up and then the jaws 241 are extruded out of the cavities a15 and can move down along the sliding ring axis to the next stage of sliding sleeve tool.
Referring to fig. 8 to 11, fig. 8 is a schematic view illustrating a state that the opener of the sliding sleeve assembly of the present embodiment moves down in the connecting section in the axial direction; FIG. 9 is a schematic view showing the opening tool of the sliding sleeve assembly of the present embodiment pushing the slider to move axially downward; FIG. 10 is a schematic view of a fractured condition of the sliding sleeve assembly of the present embodiment; fig. 11 is a schematic view showing the state that the sliding ring of the sliding sleeve assembly of the present embodiment moves upward to push the jaws out of the cavities a.
When the assembly is used, a plurality of sliding sleeve tools are connected with the pipe column in series at intervals and then are put into the stratum, then the opening tool is sent into the pipe column and drilling fluid is added to push the opening tool to move downwards in the pipe column, and as shown in figure 8, the clamping jaws slide along the inner wall of the pipe column under the action of the elastic element B. As shown in fig. 9, after the claw enters the cavity a, the claw catches the sliding ring and pushes the sliding ring to cut off the cuttable pin a, and then the claw moves downwards together, so that the jet hole is exposed and fracturing is started, as shown in fig. 10; and after fracturing is finished, further increasing the pressure of the drilling fluid to enable the sliding ring to further move downwards to cut off the cuttable pin B, then removing the pressure of the drilling fluid, enabling the sliding ring to move upwards under the action of the elastic element A, finally extruding the jaw out of the cavity A and blocking the jet hole, as shown in figure 11, pressurizing the drilling fluid after the jaw is extruded out of the cavity A, and enabling the jaw to continuously slide downwards along the inner wall of the sliding ring to a next-stage sliding sleeve tool. And after the pressure-equalizing fracturing of all the stratum sections is finished and the slip rings are dissolved, the formal oil recovery is started.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. An infinitely-level switchable full-bore sliding sleeve component comprises a sliding sleeve tool and an opening tool, and is characterized in that,
the sliding sleeve tool comprises a sliding sleeve barrel and an elastic element A, and the upper end and the lower end of the sliding sleeve barrel are provided with connecting sections; an expanding section with the inner diameter larger than that of the connecting section is arranged in the sliding sleeve body, and a first surface is arranged at the upper end of the expanding section; the diameter expanding section is provided with a jet hole penetrating through the body; a sliding ring is coaxially sleeved in the diameter expanding section, the sliding ring is connected with the diameter expanding section through a cuttable pin A, and after the connection, the sliding ring closes the jet hole, and an annular cavity A is formed between the sliding ring and the first surface at the upper end of the diameter expanding section; the elastic element A is used for pushing the sliding ring to move and tightly press the first surface at the upper end of the diameter expanding section and seal the jet hole; the sliding ring is a soluble ring;
the opening tool comprises a tool cylinder body, the tool cylinder body and the sliding sleeve body are coaxially arranged and can axially move along the sliding sleeve body; the outer wall of the tool cylinder body is provided with a rubber ring for plugging an annular gap between the tool cylinder body and the sliding sleeve body; the upper part of the tool cylinder is radially provided with a telescopic jaw structure, the telescopic jaw structure comprises a jaw and an elastic element B, the elastic element B pushes the jaw to radially extend outwards, and the jaw can extend into the cavity A; the upper part of one end of the clamping jaw, which is opposite to the inner wall of the sliding sleeve cylinder, is a third surface, the third surface is an inclined surface, and the end surface of one end of the sliding ring, which is opposite to the first surface, is a second surface; along the instrument barrel footpath, the height on third face is greater than the height of first face, and the height of second face is not more than the height of first face for elastic element A drives the slip ring and moves up the back jack catch and can be extruded cavity A and can move down along the slip ring axial.
2. The infinitely switchable full-bore sliding sleeve assembly according to claim 1, wherein a severable pin B is disposed on the expanded diameter section, and the severable pin B is located below the severable pin a and used for locking the elastic element a in a compressed state, and a severable force of the severable pin B is greater than a force applied by a drilling fluid to the severable pin B during a formation fracturing operation.
3. The infinite switchable full-bore sliding sleeve assembly according to claim 1, wherein the elastic element a is coaxially disposed with the sliding ring, and after the elastic element a contacts with the sliding ring, the claw can axially slide and move down along the inner wall of the sliding ring and the elastic element.
4. The infinitely variable switchable full-bore sliding sleeve assembly according to claim 3, wherein the elastic member A is a rubber ring with a smooth inner wall, and the inner diameter of the elastic member A is not greater than the inner diameter of the lower end port of the sliding ring.
5. The infinitely variable switchable full-bore sliding sleeve assembly according to claim 3, wherein the lower end of the sliding ring is fixedly connected with an annular tail, the sliding ring is smoothly connected with the inner wall of the annular tail, the outer diameter of the annular tail is smaller than the inner diameter of the expanding section, the other end of the annular tail is located in the connecting section when the elastic element A is fully extended, and the elastic element A is located in an annular cavity between the annular tail and the expanding section.
6. The infinitely variable switchable full-bore sliding sleeve assembly of claim 1, wherein said actuating means further comprises a resilient member C for compressing said rubber ring and radially expanding said rubber ring.
7. The infinitely switchable full bore sliding sleeve assembly of claim 1, wherein the plurality of jet holes are evenly distributed around the circumference of the sliding sleeve body.
8. The infinitely variable switchable full-bore sliding sleeve assembly of claim 1, wherein the number of retractable jaw structures is plural and the plural retractable jaw structures are evenly distributed around the circumference of the tool cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111489377.4A CN113898315B (en) | 2021-12-08 | 2021-12-08 | Unlimited-level switchable full-bore sliding sleeve assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111489377.4A CN113898315B (en) | 2021-12-08 | 2021-12-08 | Unlimited-level switchable full-bore sliding sleeve assembly |
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| CN113898315A true CN113898315A (en) | 2022-01-07 |
| CN113898315B CN113898315B (en) | 2022-03-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115853466A (en) * | 2023-01-03 | 2023-03-28 | 西南石油大学 | But unlimited level fracturing sliding sleeve of full latus rectum of repeated switch |
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| CN205778740U (en) * | 2016-05-20 | 2016-12-07 | 中石化石油工程技术服务有限公司 | A kind of seesaw type sliding sleeve opener and etc. diameter through sleeve sliding sleeve |
| CN107178352A (en) * | 2017-06-23 | 2017-09-19 | 东北石油大学 | Underground full-bore infinite stages fracturing sliding bush |
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| CN107387037A (en) * | 2017-07-11 | 2017-11-24 | 中石化石油工程技术服务有限公司 | Screen casing self-lock switch control device |
| CN207229084U (en) * | 2017-09-29 | 2018-04-13 | 西安康普威能源技术有限公司 | A kind of switchable infinite stages fracturing sliding bush switching tools |
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| CN112943200A (en) * | 2021-03-30 | 2021-06-11 | 中国石油大学(北京) | Sliding sleeve switch and shale oil three-dimensional development fracturing tool |
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| CN115853466A (en) * | 2023-01-03 | 2023-03-28 | 西南石油大学 | But unlimited level fracturing sliding sleeve of full latus rectum of repeated switch |
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