CN116480315A - Horizontal well reciprocable-opening and-closing infinite-stage fracturing well cementation sliding sleeve and technological method - Google Patents
Horizontal well reciprocable-opening and-closing infinite-stage fracturing well cementation sliding sleeve and technological method Download PDFInfo
- Publication number
- CN116480315A CN116480315A CN202310263241.4A CN202310263241A CN116480315A CN 116480315 A CN116480315 A CN 116480315A CN 202310263241 A CN202310263241 A CN 202310263241A CN 116480315 A CN116480315 A CN 116480315A
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- seal
- fracturing
- clamp spring
- positioning clamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title abstract description 13
- 238000007789 sealing Methods 0.000 claims description 18
- 238000005299 abrasion Methods 0.000 claims 1
- 239000004568 cement Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- 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)
- Sealing Devices (AREA)
Abstract
The invention relates to a horizontal well reciprocating switch infinite-stage fracturing well cementation sliding sleeve and a process method. The horizontal well reciprocating switch infinite-stage fracturing well cementation sliding sleeve mainly comprises an upper joint, an outer sleeve, an inner sliding sleeve, a first positioning clamping spring, an upper groove, a first seal, a second positioning clamping spring, a second seal, a fracturing eyelet, a third seal, a fourth seal, a third positioning clamping spring, a fifth seal, a lower groove, a lower joint and a sliding sleeve switching tool. The diameter-variable switch tool realizes the opening and closing of the sliding sleeve by changing the position of the inner sliding sleeve. The invention well solves the problems of infinite-level fracturing and normal fracturing and yield increasing transformation when the casing is deformed.
Description
Technical Field
The invention relates to a horizontal well reciprocating switch infinite-stage fracturing well cementation sliding sleeve and a process method thereof, and belongs to the field of petroleum and natural gas underground exploitation tools.
Technical Field
The well cementation sliding sleeve is used as one of fracturing tools for fracturing and reforming unconventional oil and gas resources such as shale oil, shale gas and compact oil and gas reservoirs, and particularly can realize staged fracturing by putting the well cementation sliding sleeve in the well cementation process aiming at the well zone where the staged fracturing tools cannot be put after the sleeve is deformed, even if the sleeve is deformed. The working principle is that the well cementation sliding sleeve is pre-buried at a specific position when passing through a well completion, and the fracturing operation is carried out by gradually opening the fracturing holes on the sliding sleeve. At present, a ball-throwing type well cementation sliding sleeve is more applied, but is influenced by ball seats and ball diameter level differences, so that infinite-level fracturing and full-diameter of a shaft cannot be realized. Therefore, the invention provides a horizontal well reciprocating switch infinite-stage fracturing well cementation sliding sleeve and a process method.
Disclosure of Invention
The invention aims to develop and design a horizontal well reciprocating-switch infinite-stage fracturing well cementation sliding sleeve and a process method, which are used for solving the problem that a sleeve-changing well zone is easy to occur and cannot be subjected to staged fracturing.
The invention is realized by the following technical scheme:
the horizontal well reciprocating switch infinite-stage fracturing well cementation sliding sleeve mainly comprises an upper joint, an outer sleeve, an inner sliding sleeve, a first positioning clamping spring, an upper groove, a first seal, a second positioning clamping spring, a second seal, a fracturing eyelet, a third seal, a fourth seal, a third positioning clamping spring, a fifth seal, a lower groove, a lower joint and a sliding sleeve switching tool. The upper joint and the lower joint are provided with threads which are connected with the sleeve; the outer sliding sleeve is provided with a conical fracturing eyelet, and meanwhile, the inner wall of the outer sleeve is provided with a clamping spring positioning groove and a sealing ring groove; the inner sliding sleeve is provided with a groove for hooking a switch tool; the switch tool mainly comprises: connecting screw thread, sealing rubber plug, miniature motor, sleeve, cam disk, shrinkage rod and hook block; the switch tool is connected with the oil pipe.
The further technical scheme is that the inner sliding sleeve is connected with the outer sleeve through a sealing ring and a positioning clamp spring;
the further technical scheme is that the distance between the outer sleeve and the first, second and third positioning clamp springs on the inner sliding sleeve is fixed;
the further technical scheme is that the groove arranged on the inner sliding sleeve is used for opening and closing the sliding sleeve;
the further technical scheme is that the switch tool is matched with the upper groove and the lower groove through the extending hook blocks to realize the switch of the sliding sleeve;
the further technical scheme is that the switch tool is connected with the oil pipe through connecting threads;
the further technical scheme is that the well cementation sliding sleeve is connected with a sleeve through threads at the upper joint and the lower joint of the outer sliding sleeve, and is put into the well along with the sleeve and performs well cementation operation;
the further technical scheme is that after the hook block on the switch tool is connected with the upper groove or the lower groove on the inner sliding sleeve, the sliding sleeve is opened and closed by lifting or lowering the oil pipe for a certain distance.
Compared with other well cementation sliding sleeves, the invention has the advantages that:
1. the clamp spring positioning mechanism can realize the sliding of the inner sliding sleeve and the limit (positioning) of the inner sliding sleeve;
2. the switch tool can realize diameter changing and repeated switch sliding sleeve.
Drawings
FIG. 1 is a schematic view of the overall structure of a sliding sleeve according to the present invention;
FIG. 2 is a cross-sectional view of a switch tool of the present invention;
FIG. 3 is a schematic diagram of a cross-sectional structure of a fracturing aperture according to the present invention;
FIG. 4 is an enlarged schematic view of a part of the structure of the positioning part of the clamp spring;
fig. 5 is a schematic diagram of the structure of the snap spring of the invention.
In the figure: the device comprises a 1-upper joint, a 2-first positioning clamp spring, a 3-outer sleeve, a 4-upper groove, a 5-first seal, a 6-second positioning clamp spring, a 7-second seal, an 8-inner sliding sleeve, a 9-fracturing eyelet, a 10-third seal, a 11-fourth seal, a 12-third positioning clamp spring, a 13-fifth seal, a 14-lower groove, a 15-lower joint, a 16-connecting thread, a 17-sealing rubber plug, a 18-micro motor, a 19-sleeve, a 20-cam disc, a 21-shrinkage rod and a 22-hook block.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings. The invention is further described below with reference to the accompanying drawings:
in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or mechanically connected. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
As shown in fig. 1, the horizontal well reciprocable well cementation sliding sleeve mainly comprises an upper joint 1, an outer sleeve 3, an inner sliding sleeve 8, a first positioning clamp spring 2, an upper groove 4, a first seal 5, a second positioning clamp spring 6, a second seal 7, a fracturing eyelet 9, a third seal 10, a fourth seal 11, a third positioning clamp spring 12, a fifth seal 13, a lower groove 14 and a lower joint 15.
The working process of the invention is as follows:
the well cementation sliding sleeve is connected with the sleeve through threads at the upper joint 1 and the lower joint 15 of the outer sleeve 3, and is put into the well together with the sleeve and performs well cementation operation. When the inner sliding sleeve 8 is positioned on the second positioning clamp spring 6 and the third positioning clamp spring 12, the fracturing eyelet 9 is covered, the sliding sleeve is in a closed state, and the sliding sleeve cannot perform fracturing operation. When the inner sliding sleeve 8 is positioned on the first positioning clamp spring 2 and the second positioning clamp spring 6, the fracturing eyelet 9 is opened, the sliding sleeve is in an opened state, and the sliding sleeve can perform fracturing operation. Fig. 1 shows the sliding sleeve in a closed state.
The switch tool is shown in fig. 2, and comprises the following components: the device comprises connecting threads 16, a sealing rubber plug 17, a micro motor 18, a sleeve 19, a cam disc 20, a shrinkage rod 21 and a hook block 22. When the sliding sleeve is in operation, the switching tool is lowered into a preset position in a well through the connection screw thread 16 and connected with the oil pipe, and the cam disc 20 is driven to rotate through the micro motor 18 to realize the extension and contraction of the contraction rod 21 and the hook block 22, so that the hook block 22 is matched with a groove, and the sliding sleeve is opened and closed by lifting the pipe column up and down.
The sealing structure of the inner sliding sleeve 8 adopts O-shaped sealing, and the O-shaped sealing ring can be used for static sealing and sealing (comprising reciprocating sealing and rotary sealing), and meanwhile, the O-shaped sealing has the advantages of simple design, small structure, convenience in assembly and disassembly and the like, so that the sealing structure adopted by the invention is O-shaped sealing.
Fig. 4 shows a positioning and limiting structure of the present invention, which adopts a C-shaped clamp spring (fig. 5), and the working principle is as follows: when the clamp spring is in a natural state, the clamp spring is C-shaped. The outer wall surface, the upper inclined surface and the lower inclined surface are contacted with the inner wall of the outer sleeve 3 and are clamped on a clamp spring groove on the outer sleeve 3 to realize the locking and the positioning of the inner sliding sleeve 8. When the snap springs are in a contracted state, the inner wall surfaces of the snap springs are in contact with the snap spring grooves on the inner sliding sleeve 8, the outer wall surfaces of the snap springs are in contact with the inner wall of the outer sleeve 3, the C-shaped snap springs are changed into O-shaped, and the inner sliding sleeve 8 can move back and forth in the sleeve without the action of the snap springs. Therefore, the reciprocating switch of the sliding sleeve can be realized by changing the movement direction of the inner sliding sleeve 8.
The method comprises the following steps of: firstly, the right end (the position close to the fracturing hole 9) of the inner sliding sleeve 8 is set by adopting a packer and a bridge plug, then a switch tool connected with a pipe column is used for being put into a preset position, secondly, a ground sending instruction is electrified to enable the micro motor 18 to rotate to drive a 20-cam disc to rotate, a shrinkage rod 21 and a hook block 22 are extended, the hook block 22 is connected with an upper groove, then the pipe column is lifted to enable the fracturing hole 9 to be opened, and finally sand-carrying fluid is injected from a wellhead to fracture.
After a certain section of fracturing operation is completed, the micro motor 18 is electrified through a ground sending instruction again to rotate to drive the 20-cam disc to rotate, the shrinkage rod 21 and the hook block 22 extend out, the hook block 22 is connected with the lower groove, the tubular column is lowered, the switching tool drives the inner sliding sleeve 8 to move to the positions of the second positioning clamp spring 6 and the third positioning clamp spring 12, and therefore the fracturing holes 9 are shielded to achieve the purpose of closing the sliding sleeve.
And when the next stage of fracturing is carried out, repeating the steps to complete all fracturing operations.
The foregoing description of the embodiments provides further details of the objects, aspects and advantages of the present invention, and it should be understood that the foregoing description is only one embodiment of the present invention, and is not intended to limit the scope of the present invention, but any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a horizontal well can reciprocating switch infinite stage fracturing well cementation sliding sleeve which characterized in that includes: the novel high-pressure oil seal device comprises an upper joint (1), an outer sleeve (3), an inner sliding sleeve (8), a first positioning clamp spring (2), an upper groove (4), a first seal (5), a second positioning clamp spring (6), a second seal (7), a fracturing eyelet (9), a third seal (10), a fourth seal (11), a third positioning clamp spring (12), a fifth seal (13), a lower groove (14), a lower joint (15), a connecting thread (16), a sealing rubber plug (17), a micro motor (18), a sleeve (19), a cam disc (20), a shrinkage rod (21) and a hook block (22).
2. The horizontal well reciprocating switch infinite stage fracturing well cementation sliding sleeve according to claim 1, wherein external threads are respectively arranged on the upper joint (1) and the lower joint (14) so as to be convenient to connect with a sleeve.
3. The horizontal well reciprocating switch infinite stage fracturing well cementation sliding sleeve according to claim 2 is characterized in that three clamp spring positioning grooves are formed in the inner wall of the inner sliding sleeve (8) and are respectively matched with the first positioning clamp spring (2), the second positioning clamp spring (6) and the third positioning clamp spring (12), and the positioning clamp springs are in a compressed state at the moment.
4. The horizontal well reciprocating switch infinite stage fracturing well cementation sliding sleeve according to claim 3, wherein in an initial state, a first seal (5), a second seal (7) and a third seal (10) are arranged at two ends of a first positioning clamp spring (2), a second positioning clamp spring (6) and a third positioning clamp spring (12) of the inner sliding sleeve (8), and the sealing positions are O-shaped seals for preventing excessive abrasion of the clamp springs in well cementation and fracturing operations.
5. The horizontal well reciprocable open-close infinite stage fracturing well cementing sliding sleeve according to claim 4, wherein in an initial state, the sliding sleeve (8) is positioned at the second positioning clamp spring (6) and the third positioning clamp spring (12), and the fracturing eyelet (9) is in a closed state.
6. The horizontal well reciprocating switch infinite stage fracturing well cementation sliding sleeve according to claim 5 is characterized in that a third seal (10) and a fourth seal (11) are arranged at two ends of the inner sliding sleeve (8), and the purpose of the sliding sleeve is to prevent impurities such as cement paste from entering the inner sliding sleeve to influence the opening and closing of the sliding sleeve.
7. The horizontal well reciprocating switch infinite stage fracturing well cementation sliding sleeve according to claim 6 is characterized in that an upper groove (4) and a lower groove (14) are arranged at the upper end and the lower end of the inner side of the inner sliding sleeve (8); the upper groove (4) and the lower groove (14) are key structures for connecting the sliding sleeve with the switch tool.
8. The horizontal well reciprocable open-and-close infinite stage fracturing well cementing sliding sleeve according to claim 7, wherein the casing (3) is provided with fracturing perforations (9), the fracturing perforations (9) being conical holes; when the first positioning clamp spring (2) and the second positioning clamp spring (6) on the inner sliding sleeve (8) are positioned, the fracturing eyelet (9) is in an open state.
9. The horizontal well reciprocable switching infinite stage fracturing cementing sliding sleeve according to claim 8, wherein the switching tool comprises connecting threads (16), a sealing rubber plug (17), a micro motor (18), a sleeve (19), a cam plate (20), a shrink rod (21) and a hook block (22).
10. The horizontal well reciprocating switch infinite stage fracturing well cementation sliding sleeve according to claim 9, wherein the shrinkage rod (21), the hook block (22) and the upper groove (4) or the lower groove (14) are matched and connected through the hook block (22) to drag the inner sliding sleeve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310263241.4A CN116480315A (en) | 2023-03-17 | 2023-03-17 | Horizontal well reciprocable-opening and-closing infinite-stage fracturing well cementation sliding sleeve and technological method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310263241.4A CN116480315A (en) | 2023-03-17 | 2023-03-17 | Horizontal well reciprocable-opening and-closing infinite-stage fracturing well cementation sliding sleeve and technological method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116480315A true CN116480315A (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310263241.4A Pending CN116480315A (en) | 2023-03-17 | 2023-03-17 | Horizontal well reciprocable-opening and-closing infinite-stage fracturing well cementation sliding sleeve and technological method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116480315A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016112612A1 (en) * | 2015-01-15 | 2016-07-21 | 深圳市百勤石油技术有限公司 | Ball seat assembly and ball throwing sliding sleeve type fracturing device |
| CN106401531A (en) * | 2016-12-14 | 2017-02-15 | 中国石油集团川庆钻探工程有限公司 | Coiled tubing open-close slide sleeve for staged fracturing acidification transformation and control method thereof |
| CN110130855A (en) * | 2019-07-02 | 2019-08-16 | 陕西延长石油(集团)有限责任公司研究院 | A kind of switchable sliding sleeve of pressure break full-bore and its application method |
| US20210140272A1 (en) * | 2019-11-12 | 2021-05-13 | Aimin Chen | Switch sliding sleeve device for oil-gas exploitation and switching method thereof, oil-gas exploitation tool and switching method of wall through hole thereof |
| CN113266308A (en) * | 2021-06-21 | 2021-08-17 | 西南石油大学 | Well cementation sliding sleeve and method for infinite-stage alternate fracturing full-path switch of horizontal well |
| CN113279725A (en) * | 2021-06-04 | 2021-08-20 | 西南石油大学 | Infinitely variable intelligent rotary dart sliding sleeve |
| CN114059964A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Hydraulic closing tool for closing sliding sleeve switch and sliding sleeve switch tool assembly |
| CN115030687A (en) * | 2022-07-03 | 2022-09-09 | 东北石油大学 | Underground multistage fracturing electric control sliding sleeve |
| CN115478807A (en) * | 2021-06-16 | 2022-12-16 | 中石化石油工程技术服务有限公司 | Full latus rectum switch well cementation sliding sleeve |
-
2023
- 2023-03-17 CN CN202310263241.4A patent/CN116480315A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016112612A1 (en) * | 2015-01-15 | 2016-07-21 | 深圳市百勤石油技术有限公司 | Ball seat assembly and ball throwing sliding sleeve type fracturing device |
| CN106401531A (en) * | 2016-12-14 | 2017-02-15 | 中国石油集团川庆钻探工程有限公司 | Coiled tubing open-close slide sleeve for staged fracturing acidification transformation and control method thereof |
| CN110130855A (en) * | 2019-07-02 | 2019-08-16 | 陕西延长石油(集团)有限责任公司研究院 | A kind of switchable sliding sleeve of pressure break full-bore and its application method |
| US20210140272A1 (en) * | 2019-11-12 | 2021-05-13 | Aimin Chen | Switch sliding sleeve device for oil-gas exploitation and switching method thereof, oil-gas exploitation tool and switching method of wall through hole thereof |
| CN114059964A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Hydraulic closing tool for closing sliding sleeve switch and sliding sleeve switch tool assembly |
| CN113279725A (en) * | 2021-06-04 | 2021-08-20 | 西南石油大学 | Infinitely variable intelligent rotary dart sliding sleeve |
| CN115478807A (en) * | 2021-06-16 | 2022-12-16 | 中石化石油工程技术服务有限公司 | Full latus rectum switch well cementation sliding sleeve |
| CN113266308A (en) * | 2021-06-21 | 2021-08-17 | 西南石油大学 | Well cementation sliding sleeve and method for infinite-stage alternate fracturing full-path switch of horizontal well |
| CN115030687A (en) * | 2022-07-03 | 2022-09-09 | 东北石油大学 | Underground multistage fracturing electric control sliding sleeve |
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