CN110331957B - Multiple-setting expansion type fracturing packer - Google Patents
Multiple-setting expansion type fracturing packer Download PDFInfo
- Publication number
- CN110331957B CN110331957B CN201910719430.1A CN201910719430A CN110331957B CN 110331957 B CN110331957 B CN 110331957B CN 201910719430 A CN201910719430 A CN 201910719430A CN 110331957 B CN110331957 B CN 110331957B
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- CN
- China
- Prior art keywords
- seat
- rubber cylinder
- piston
- cylinder
- slip
- 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.)
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000012856 packing Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 8
- 238000004873 anchoring Methods 0.000 abstract description 6
- 238000010008 shearing Methods 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
- E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
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 discloses a multi-set expansion type fracturing packer which comprises an upper joint, a rubber cylinder assembly, a central tube, a rubber cylinder, a cone, a slip body, a spring, a fixing ring, a slip seat, a piston cylinder, a piston, a baffle ring and a lower joint, wherein the upper joint and the lower joint are sleeved at two ends of the central tube, the rubber cylinder assembly, the rubber cylinder, the cone, the slip body, the slip seat and the piston cylinder are sleeved on the central tube from top to bottom, the packer is supported by a neck slip seat, and a set sealing mode of locking a locking block can realize repeated anchoring of multi-fracturing by one pipe column. The rubber cylinder adopts a steel wire curtain skeleton structure, and the upper end and the lower end of the rubber cylinder are fixed, so that repeated seat sealing of the rubber cylinder is realized. The slip seat adopts a shearing pin locking mode, and the locking ring is connected with the central pipe, so that the problem that the packer is set in advance due to unexpected setting of the slips when the slips are in a well is prevented, and the slips can be prevented from being anchored accidentally when the slips are set for a plurality of times, so that the reliability of tool operation is ensured.
Description
Technical Field
The invention belongs to the technical field of underground fracturing equipment, and particularly relates to a multi-setting expansion type fracturing packer.
Background
The bottom seal dragging staged fracturing technology and the coiled tubing dragging fracturing technology are used in oil fields, and are one of important technologies for horizontal well reconstruction of the oil fields. Along with the introduction and wide use of volume fracturing and coiled tubing fracturing processes, the construction displacement and pressure are continuously improved, and the Y211 packer has the problems of high operation difficulty, difficult unlocking, unreliable seat sealing and the like. The analysis reason is mainly that when the pipe column is lifted and lowered, the lifting and deblocking difficulty of the Y211 packer slips is high, meanwhile, the sealing area of the compression type rubber cylinder is short due to serious casing damage, and the repairing and sealing of a large area cannot be achieved. In the fracturing process, the expanding K344 packer can meet the requirement of large-area setting, but can not realize repeated setting and unsetting of a tubular column. Because the pipe column is easy to blow up due to the impact of lower pressure in the fracturing process, the K344 packer is not provided with an anchoring mechanism structurally, and the pipe column cannot be ensured to be seated at a designated position in the fracturing process. The fracturing process cannot be accomplished.
Disclosure of Invention
The invention solves the defects of the prior art, provides the multi-setting expansion type fracturing packer, and meets the field requirements of reliable setting, repeated setting, reliable anchoring, thorough deblocking and simple operation.
The technical scheme adopted by the invention is as follows: the utility model provides an expansion formula fracturing packer is sealed to many times, includes top connection, packing element, center tube, packing element, cone, slips body, spring, solid fixed ring, slips seat, piston tube, piston, baffle ring and lower clutch, the top connection is located the center tube both ends with lower clutch cover, on the center tube was located to packing element, cone, slips body, slips seat, piston tube from top to bottom cover, packing element one end step wears to locate the step intracavity that packing element and center tube formed, and its other end step is inlayed in the cone, the conical surface of cone is inlayed in the bell mouth of slips body one end, the clamp body deviates from the cone tip and has the annular hole, the spring sets up in the annular hole, the spring outer end is fixed through solid fixed ring, gu fixed ring one end is connected with slips body one end, and its other end is connected with slips seat one end, slips seat upper end offsets with slips body lower tip, and in the piston tube is worn to locate by its lower tip, just slips seat deviates from body one end and is connected with the center tube through the locking piece, first end is inlayed in the conical hole of slips body one end, it is located in the piston tube and the piston end is formed with the piston sleeve down to the piston end.
Preferably, the rubber cylinder assembly comprises a rubber cylinder seat and a supporting seat, the rubber cylinder seat and the supporting seat are sequentially sleeved on the central tube, the upper end of the rubber cylinder seat abuts against the lower end of the upper joint, and the lower end of the supporting seat abuts against one end of the rubber cylinder.
Preferably, a first pressure-entering sand-preventing channel is arranged on the central tube corresponding to the middle part of the rubber cylinder, and a second pressure-entering sand-preventing channel is arranged on the central tube corresponding to the middle part of the slip seat.
Preferably, the rubber cylinder adopts a steel wire curtain skeleton structure, the step at the upper end of the rubber cylinder is fixed at the upper part of the central tube, the lower end of the rubber cylinder is fixed at the middle part of the central tube through a second pin, O-shaped ring grooves are formed at two ends of an inner hole of the rubber cylinder, and O-shaped rings are arranged in the O-shaped ring grooves.
Preferably, the lower end of the piston cylinder is fixed on a step of the lower joint, and the piston cylinder is limited by a baffle ring.
Preferably, the outer circle of the piston cylinder is provided with a pressure inlet hole, and the piston is pushed to move after the pressure inlet hole is pressed.
Compared with the prior art, the invention has the following beneficial effects:
1. the packer is supported by the neck slip body, the slip seat is locked by the locking block and is fixedly combined with the first pin in an anchoring mode, and repeated anchoring of multiple fracturing can be achieved by one pipe column.
2. The rubber cylinder adopts a steel wire curtain skeleton structure, and the upper end and the lower end of the rubber cylinder are fixed, so that repeated seat sealing of the rubber cylinder is realized.
3. The first sand-proof channel and the second sand-proof channel are arranged, the conventional sand-proof hole is broken, the first sand-proof channel prevents the fracturing sand from entering the central tube and the cavity of the rubber cylinder ring, and further the deblocking of the rubber cylinder is affected. The second advances to press sand control passageway, prevents that the fracturing sand from getting into the slips seat through the center tube in, causes the unable unclamping of slips seat to retrieve, simultaneously, prevents that the fracturing sand from blockking up into the pressure hole, and then causes the slips unable anchor seat to seal.
4. The slip seat adopts a shearing pin locking mode, and a locking ring fixing mode is connected with the central pipe, so that the problem that the packer is set in advance due to unexpected setting of the slips during well descending is avoided.
5. The packer deblocking structure adopts a pressure inlet structure designed on a piston cylinder. When the oil pipe is decompressed during deblocking or the pressure outside the sleeve is larger than the pressure of the oil pipe, the pressure enters through a pressure inlet hole on the piston cylinder to push the piston to move, and the locking block is prevented from removing the anchoring of the slips.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
Referring to FIG. 1, an optimized and concise structure is integrally adopted, the multi-setting expansion type fracturing packer comprises an upper joint 1, a rubber barrel assembly, a central tube 4, a rubber barrel 5, a cone 6, a slip body 7, a spring 8, a fixing ring 9, a slip seat 10, a piston barrel 11, a piston 12, a baffle ring 13 and a lower joint 14, wherein the upper joint 1 and the lower joint 14 are sleeved at two ends of the central tube 4, namely, two ends of the central tube 4 are respectively connected with the upper joint 1 and the lower joint 14, the rubber barrel assembly, the rubber barrel 5, the cone 6, the slip body 7, the slip seat 10 and the piston barrel 11 are sleeved on the central tube 4 from top to bottom, one end step of the rubber barrel 5 is penetrated in a step cavity formed by the rubber barrel assembly and the central tube 4, the other end step of the rubber barrel is embedded in the cone 6, the conical surface of the cone 6 is arranged in a conical hole at one end of the slip body 7, the slip body 7 supports the neck of the packer, the pipe column is repeatedly anchored by fracturing, the cone 7 is separated from the end of the annular hole 6, the spring 8 is respectively connected with the upper joint 1 and the lower joint 14, the slip body 10 is repeatedly anchored with the slip body 10 by the slip seat 10, the end of the slip body is fixedly connected with the end of the slip seat 10 through the slip seat 10 at one end of the slip seat 10, the slip seat is repeatedly connected with the end of the slip seat by the piston seat 10, and the end of the piston seat is connected with the end of the slip seat 10 by the piston seat 10 by the pin 15, the pin is accidentally, the pin is fixed at one end of the end is connected with the end of the end is fixed seat is connected with the end seat 10 by the end seat is fixed by the end 15, the piston 12 is arranged in an annular cavity formed by the piston cylinder 11 and the slip body 7, the baffle ring 13 is sleeved at one end of the lower joint 14, and the upper end of the baffle ring abuts against the lower end of the piston cylinder 11.
With continued reference to fig. 1, in order to further implement repeated sealing of the rubber tube 5, the rubber tube assembly includes a rubber tube seat 2 and a support seat 3, the rubber tube seat 2 and the support seat 3 are sequentially sleeved on the central tube 4, the upper end of the rubber tube seat 2 abuts against the lower end of the upper joint 1, and the lower end of the support seat 3 abuts against one end of the rubber tube 5. The outer circle of the supporting seat 3 is connected with the rubber cylinder 5, the inner hole of the supporting seat is connected with the upper end of the rubber cylinder 5, namely the upper end of the rubber cylinder 5 is penetrated in the inner hole of the supporting seat 3, and the supporting seat is fixedly connected with the central tube 4.
With continued reference to fig. 1, in order to prevent the glue cylinder 5 and the slip bowl 10 from being able to be successfully unsealed. The central pipe 4 is provided with a first pressure-entering sand-preventing channel 18 corresponding to the middle part of the rubber cylinder 5, and the central pipe 4 is provided with a second pressure-entering sand-preventing channel 19 corresponding to the middle part of the slip seat 10. The arrangement of the first pressure inlet sand prevention channel 18 and the second pressure inlet sand prevention channel 19 breaks through the conventional arrangement mode of the pressure inlet holes, wherein the first pressure inlet sand prevention channel 18 prevents the fracturing sand from entering the central tube and the annular cavity of the rubber cylinder 5, so that the deblocking of the rubber cylinder 5 is affected, and meanwhile, the pressure cannot enter between the central tube 4 and the rubber cylinder 5 due to the blocking of the pressure inlet holes by the fracturing sand is prevented, so that the rubber cylinder 5 cannot be deblocked. The second sand-proof channel 19 prevents the fracturing sand from entering the slip seat 10 through the central tube 4, so that the slip seat 10 cannot be released and recovered, and meanwhile, the fracturing sand is prevented from blocking the pressure inlet holes, so that the slip seat 10 cannot be anchored.
With continued reference to fig. 1, in order to further realize repeated seat sealing of the rubber cylinder 5, the rubber cylinder 5 adopts a steel wire curtain skeleton structure, the step at the upper end of the rubber cylinder 5 is fixed at the upper part of the central tube 4, the lower end of the rubber cylinder is fixed at the middle part of the central tube 4 through a second pin 20, both ends of the inner hole of the rubber cylinder 5 are provided with O-shaped ring grooves 21, and the O-shaped ring grooves 21 are internally provided with O-shaped rings 22.
With continued reference to fig. 1, in order to realize the limitation of the piston cylinder 11, the lower end of the piston cylinder 11 is fixed on the step of the lower joint 14, and the stop ring 13 is sleeved on the lower joint 14, and one end of the stop ring abuts against one end of the piston cylinder 11, so as to realize the limitation of the stop ring 13 on the piston cylinder 11.
With continued reference to fig. 1, in order to prevent the lock block 15 from removing the anchor of the slip bowl 10, the outer circumference of the piston cylinder 11 is provided with a pressure inlet hole 17, and the piston 12 is pushed to move after the pressure inlet hole 17 is pressed, which is specifically based on the following principle: when the oil pipe is decompressed during deblocking or the pressure outside the sleeve is larger than the pressure of the oil pipe, the pressure enters the pushing piston 12 through the pressure inlet hole 17 on the piston cylinder 11 to move, so that the locking block 15 is prevented from being removed from the slip seat 10 to be anchored.
The working principle of the packer is as follows: the central pipe 4 is provided with a first pressure inlet sand prevention channel 18, when the packer is connected to a pipe column for use, and when the pressure in the central pipe 4 is higher than the annular pressure of the oil jacket, the rubber cylinder 5 is inflated to be in contact with the inner diameter of the casing, so that the function of packing the annular space of the oil jacket is achieved; the slip body 7 is stretched and anchored on the inner wall of the casing, and the control pipe column cannot descend. When the pressure in the central tube 4 is lower than the annular pressure of the oil sleeve, the rubber sleeve 5 is recovered and unsealed, the slip body 7 is recovered, and the slip body 7 can be forcedly recovered when the pipe column is lifted.
The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention, so that all equivalent modifications made by the appended claims shall be included in the scope of the present invention.
Claims (3)
1. The utility model provides a many times seat seals expansion formula fracturing packer, its characterized in that, including top connection (1), packing element subassembly, center tube (4), packing element (5), cone (6), slips body (7), spring (8), solid fixed ring (9), slips seat (10), piston cylinder (11), piston (12), backing ring (13) and lower clutch (14), top connection (1) and lower clutch (14) cover locate center tube (4) both ends, packing element subassembly, packing element (5), cone (6), slips body (7), slips seat (10), piston cylinder (11) are from top to bottom cover and are located on center tube (4), in the step chamber that packing element (5) one end step worn to locate packing element and center tube (4) formed, its other end step is inlayed in cone (6), the conical surface of cone (6) is inlayed in the bell mouth of slips body (7) one end, slips body (7) deviating from cone (6) tip has the annular hole, spring (8) set up in the annular hole, spring (8) are located outside fixed ring (9) one end and one end (9) are fixed through fixing the ring (9), the upper end of the slip seat (10) is propped against the lower end of the slip body (7), the lower end of the slip seat is penetrated into the piston cylinder (11), one end of the slip seat (10) deviating from the slip body (7) is connected with the central tube (4) through a locking block (15) and a first pin (16), one end of the first pin (16) penetrates through a piston (12), the piston (12) is arranged in an annular cavity formed by the piston cylinder (11) and the slip body (7), the baffle ring (13) is sleeved at one end of the lower joint (14), and the upper end of the baffle ring is propped against the lower end of the piston cylinder (11);
the outer circle of the piston cylinder (11) is provided with a pressure inlet hole (17), and the piston (12) is pushed to move after the pressure inlet hole (17) is pressed;
the rubber cylinder assembly comprises a rubber cylinder seat (2) and a supporting seat (3), the rubber cylinder seat (2) and the supporting seat (3) are sequentially sleeved on a central tube (4), the upper end of the rubber cylinder seat (2) abuts against the lower end of the upper joint (1), and the lower end of the supporting seat (3) abuts against one end of the rubber cylinder (5);
A first pressure-entering sand-preventing channel (18) is arranged on the central pipe (4) corresponding to the middle part of the rubber cylinder (5), and a second pressure-entering sand-preventing channel (19) is arranged on the central pipe (4) corresponding to the middle part of the slip seat (10);
The outer circle of the supporting seat (3) is connected with the rubber cylinder (5), the inner hole of the supporting seat is connected with the upper end of the rubber cylinder (5), namely the upper end of the rubber cylinder (5) is penetrated in the inner hole of the supporting seat (3), and the supporting seat is fixedly connected with the central tube (4).
2. The multi-setting expansion type fracturing packer according to claim 1, wherein the rubber cylinder (5) adopts a steel wire curtain skeleton structure, the step at the upper end of the rubber cylinder (5) is fixed on the upper portion of the central tube (4), the lower end of the rubber cylinder is fixed in the middle of the central tube (4) through a second pin (20), O-shaped ring grooves (21) are formed in two ends of an inner hole of the rubber cylinder (5), and O-shaped rings (22) are arranged in the O-shaped ring grooves (21).
3. The multi-setting expansion type fracturing packer according to claim 2, characterized in that the lower end of the piston cylinder (11) is fixed on the step of the lower joint (14), and the piston cylinder (11) limits the piston cylinder through a baffle ring (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910719430.1A CN110331957B (en) | 2019-08-06 | 2019-08-06 | Multiple-setting expansion type fracturing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910719430.1A CN110331957B (en) | 2019-08-06 | 2019-08-06 | Multiple-setting expansion type fracturing packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110331957A CN110331957A (en) | 2019-10-15 |
| CN110331957B true CN110331957B (en) | 2024-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910719430.1A Active CN110331957B (en) | 2019-08-06 | 2019-08-06 | Multiple-setting expansion type fracturing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110331957B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042778A (en) * | 2019-11-26 | 2020-04-21 | 宝鸡瑞林石油机电设备有限责任公司 | Multiple-time seat-seal preset type throttler |
| CN110965958A (en) * | 2019-11-26 | 2020-04-07 | 宝鸡瑞林石油机电设备有限责任公司 | Bidirectional seat seal backflow-preventing packer |
| CN112761568B (en) * | 2020-12-30 | 2022-12-13 | 胜利方兰德石油装备股份有限公司 | Packer |
| CN114837599B (en) * | 2022-05-12 | 2022-11-04 | 百勤能源科技（惠州）有限公司 | High-temperature high-pressure recoverable packer |
| CN115288611B (en) * | 2022-08-08 | 2023-04-21 | 西南石油大学 | Omnibearing horizontal directional deflecting tool for coiled tubing |
| CN117988758B (en) * | 2024-03-29 | 2024-06-21 | 西安宇星石油机械新技术开发有限公司 | Hydraulic internal energy storage lockable bidirectional anchoring slip packer for fracturing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201057016Y (en) * | 2007-06-26 | 2008-05-07 | 大港油田集团有限责任公司 | Hydraulic self-sealing slip packer |
| CN106593346A (en) * | 2016-12-26 | 2017-04-26 | 中国石油天然气股份有限公司 | Chemical de-blocking compression slip fracturing packer |
| CN206530312U (en) * | 2017-03-08 | 2017-09-29 | 阜新驰宇石油机械有限公司 | A kind of inflatable packer |
| CN210422556U (en) * | 2019-08-06 | 2020-04-28 | 宝鸡瑞林石油机电设备有限责任公司 | Multiple setting expansion type fracturing packer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB862699A (en) * | 1959-08-06 | 1961-03-15 | Brown Cicero Columbus | Well completion and well packer apparatus and methods of selectively manipulating a plurality of well packers |
| US4697640A (en) * | 1986-01-16 | 1987-10-06 | Halliburton Company | Apparatus for setting a high temperature packer |
| US6349772B2 (en) * | 1998-11-02 | 2002-02-26 | Halliburton Energy Services, Inc. | Apparatus and method for hydraulically actuating a downhole device from a remote location |
| AR067941A1 (en) * | 2008-08-14 | 2009-10-28 | Carro Gustavo Ignacio | HYDRAULIC PACK (PACKER) FOR PITCHED WELLS. |
| CN102996092B (en) * | 2012-11-07 | 2015-02-11 | 宝鸡瑞林石油机电设备有限责任公司 | Hydraulic-control double-stage well test blowout preventer |
-
2019
- 2019-08-06 CN CN201910719430.1A patent/CN110331957B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201057016Y (en) * | 2007-06-26 | 2008-05-07 | 大港油田集团有限责任公司 | Hydraulic self-sealing slip packer |
| CN106593346A (en) * | 2016-12-26 | 2017-04-26 | 中国石油天然气股份有限公司 | Chemical de-blocking compression slip fracturing packer |
| CN206530312U (en) * | 2017-03-08 | 2017-09-29 | 阜新驰宇石油机械有限公司 | A kind of inflatable packer |
| CN210422556U (en) * | 2019-08-06 | 2020-04-28 | 宝鸡瑞林石油机电设备有限责任公司 | Multiple setting expansion type fracturing packer |
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| Publication number | Publication date |
|---|---|
| CN110331957A (en) | 2019-10-15 |
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