CN114961641B - Soluble bridge plug with high dissolution speed - Google Patents
Soluble bridge plug with high dissolution speed Download PDFInfo
- Publication number
- CN114961641B CN114961641B CN202210513947.7A CN202210513947A CN114961641B CN 114961641 B CN114961641 B CN 114961641B CN 202210513947 A CN202210513947 A CN 202210513947A CN 114961641 B CN114961641 B CN 114961641B
- Authority
- CN
- China
- Prior art keywords
- guide shoe
- pull rod
- bridge plug
- rubber cylinder
- ring groove
- 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.)
- Active
Links
- 238000004090 dissolution Methods 0.000 title claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 229920000742 Cotton Polymers 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 244000137852 Petrea volubilis Species 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 238000010008 shearing Methods 0.000 claims abstract 6
- 238000004891 communication Methods 0.000 claims description 5
- 239000002195 soluble material Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
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)
- Polishing Bodies And Polishing Tools (AREA)
- Pipe Accessories (AREA)
Abstract
The invention provides a soluble bridge plug with high dissolution speed. Relates to the technical field of oilfield downhole tools. The lower part of the retainer ring at the lower part of the rubber cylinder is provided with a cleaning pipe, a compression spring is arranged between the retainer ring at the lower part of the cleaning pipe and the guide shoe, the inner side of the rubber cylinder is provided with a shaft and a shearing pipe, the middle part of the shaft is provided with a protruding shear pin I which is blocked at the outer side of the shearing pipe, and the length direction of an integrated structure formed by the shaft and the shearing pipe is propped against the retainer rings at the two sides. The invention has the following beneficial effects: the oil absorption cotton sliver and the sand paper on the cleaning pipe are used for cleaning the inner wall of the sleeve, the rubber cylinder is lowered and expanded under pressure and stuck on the cleaned inner wall of the sleeve, the sealing effect is improved, the release mechanism and the runner are designed to enable the unidirectional teeth to be firstly dissolved, the bridge plug is unsealed, liquid can quickly enter each part of the bridge plug, the dissolution speed is accelerated, meanwhile, liquid in the well enters each part from each blind hole, the dissolution speed is improved, the dissolution time of each part is almost shortened, the dissolution time of the whole bridge plug is shortened, and the action efficiency is improved.
Description
Technical Field
The invention relates to the technical field of downhole tools in oil fields, in particular to a soluble bridge plug with high dissolution speed.
Background
In the oil gas development process, especially in the development process of unconventional oil gas, compact oil gas, low-permeability oil gas and the like, a large number of multistage staged fracturing technologies of perforating gun-soluble bridge plug combination are adopted, and the fracturing bridge plug is used as an isolation tool between each section of construction, however, when in actual use, crude oil and rust impurities on a sleeve reduce the sealing performance of a rubber cylinder, and in addition, as the shape and the size of the rubber cylinder, a taper sleeve, slips and a pull rod are different, the dissolution time of the volume is different under the same dissolution rate, the integral dissolution time of the soluble bridge plug is prolonged, and the quick production of a gas well is influenced.
Disclosure of Invention
In order to solve the problem of low operation efficiency of the conventional soluble bridge plug, the invention provides the soluble bridge plug with high dissolution speed.
The technical scheme of the invention is as follows: the invention discloses a soluble bridge plug with high dissolution speed, which comprises a pull rod, a push plate, taper sleeves, slips, rubber barrels and guide shoes, wherein the structure is a basic structure of a common bridge plug.
The taper sleeve is connected with the guide shoe through one-way teeth, the upper part of the taper sleeve is provided with a ring groove III, the pull rod is provided with an external connecting channel at the position of the ring groove III, which is communicated with the outside of the pull rod, and the communicating position of the pull rod and the outside of the pull rod is provided with a release mechanism; the middle part of the guide shoe is provided with a ring groove II, the guide shoe is provided with an external connecting channel which is communicated with the outside of the guide shoe, a release mechanism is arranged at the communicating part with the outside of the guide shoe, the upper part of the ring groove II is provided with a flow passage, and the flow passage is communicated with the space at the inner side of the slip.
The release mechanism comprises a piston hole formed in the pull rod and the guide shoe, wherein the inner side of the piston hole is communicated with the outer communication channel, a piston is arranged in the piston hole and is connected with the piston hole through a sealing ring in a clearance fit manner, a counter bore is drilled in one side of the piston, a compression spring and a shear pin II are arranged in the counter bore, a ring groove I is formed in the pull rod and the guide shoe, one half of the shear pin II extends into the ring groove I, and the compression spring is arranged between the piston and the bottom surface of the piston hole.
The slips are provided with a plurality of blind holes from inside to outside, the taper sleeves are provided with a plurality of blind holes from inside to outside, and the guide shoes are provided with a plurality of blind holes communicated with the outer communication channel.
The outside of the cleaning tube is adhered with an oil absorption cotton sliver and sand paper. The pull rod, the taper sleeve, the guide shoe, the slip, the retainer ring, the push plate and the rubber cylinder are all made of soluble materials.
The invention has the following beneficial effects: when setting slips moves downwards, the cleaning pipe is pushed at first, the pressed external diameter of the cleaning pipe is larger, the oil absorption cotton sliver and the sand paper on the cleaning pipe clean the inner wall of the sleeve, the slips continue to descend, the shear pins I are sheared off, the rubber cylinder descends to be pressed and expanded and is attached to the cleaned inner wall of the sleeve, the sealing effect is improved, the release mechanism and the runner are designed to enable the unidirectional teeth to be firstly dissolved, the bridge plug is unsealed, liquid can quickly enter each part of the bridge plug, the dissolving speed is accelerated, meanwhile, the liquid in the well enters each part from each blind hole, the dissolving speed is improved, the dissolving time of each part is almost shortened, the dissolving time of the whole bridge plug is shortened, and the acting efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
fig. 4 is a schematic view of the structure of the cleaning tube of the present invention.
In the drawing, a pull rod, a 2-taper sleeve, a 3-slip, a 4-rubber cylinder, a 5-guide shoe, a 6-retainer ring, a 7-push plate, an 8-shaft, a 9-shear pipe, a 10-shear pin I, an 11-piston, a 12-shear pin II, a 13-annular groove I, a 14-piston hole, a 15-external connecting channel, a 16-annular groove II, a 17-annular groove III, an 18-release mechanism, a 19-cleaning pipe, a 20-blind hole, a 21-overflow channel, a 22-oil absorption cotton sliver and 23-abrasive paper are arranged.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the invention discloses a soluble bridge plug with high dissolution rate, which is shown by combining fig. 1 with fig. 2-4 and comprises a pull rod 1, a push plate 7, a taper sleeve 2, slips 3, a rubber cylinder 4 and a guide shoe 5, wherein the structure is a basic structure of a common bridge plug.
The taper sleeve 2 is connected with the guide shoe 5 through one-way teeth, the upper part of the taper sleeve 2 is provided with a ring groove III17, the pull rod 1 is provided with an external communication channel 15 at the position of the ring groove III17, which is communicated with the outside of the pull rod 1, and a release mechanism 18 is arranged at the position communicated with the outside of the pull rod 1; the middle part of the guide shoe 5 is provided with a ring groove II16, the guide shoe 5 is provided with an external connecting channel 15 which is communicated with the outside of the guide shoe 5, a release mechanism 18 is arranged at the communicating part with the outside of the guide shoe 5, the upper part of the ring groove II16 is provided with a through-flow channel 21, and the through-flow channel 21 is communicated with the space at the inner side of the slip 3.
The release mechanism 18 comprises a piston hole 14 formed in the pull rod 1 and the guide shoe 5, wherein the inner side of the piston hole 14 is communicated with the outer communication channel 15, a piston 11 is arranged in the piston hole 14, the piston 11 is connected with the piston hole 14 through clearance fit of a sealing ring, a counter bore is drilled in one side of the piston 11, a compression spring and a shear pin II12 are arranged in the counter bore, an annular groove I13 is formed in the pull rod 1 and the guide shoe 5, one half of the shear pin II12 extends into the annular groove I13, and the compression spring is arranged between the piston 11 and the bottom surface of the piston hole 14.
The slips 3 are provided with a plurality of blind holes 20 from inside to outside, the taper sleeve 2 is provided with a plurality of blind holes 20 from inside to outside of the ring groove III17, and the guide shoes 5 are provided with a plurality of blind holes 20 communicated with the outer communicating channel 15.
An oil absorbing cotton sliver 22 and sand paper 23 are adhered to the outer side of the cleaning tube 19.
The pull rod 1, the taper sleeve 2, the guide shoe 5, the slips 3, the retainer ring 6, the push plate 7 and the rubber cylinder 4 are all made of soluble materials.
When the setting slips 3 move downwards, the cleaning pipe 19 is pushed firstly, the pressed outer diameter of the cleaning pipe 19 is larger, the inner wall of the sleeve is cleaned by the oil absorption cotton sliver 22 and the sand paper 23 on the cleaning pipe 19, the slips 3 continue to descend, the shear pins I10 are sheared off, the rubber cylinder 4 descends, is pressed and expands and is attached to the cleaned inner wall of the sleeve, and the sealing effect is improved.
After the bridge plug is put down to a designated position, fracturing is carried out, the shear pin II12 is sheared by the pressure of fracturing, the piston 11 is in a floating state, the piston hole 14 is pressed under the pressure of fracturing, after the fracturing is finished, the fracturing pressure disappears, the piston 11 is pushed out of the piston hole 14 under the action of a compression spring, the upper outer communicating channel 15 and the lower outer communicating channel 15 are communicated, the pressure difference between the upper stratum and the lower stratum sealed by the rubber cylinder 4 drives liquid in a well to enter a unidirectional tooth part connected with the taper sleeve 2 and the guide shoe 5 from the outer communicating channel 15, the unidirectional tooth is small in size and is dissolved first, the bridge plug is unsealed, the liquid can quickly enter each part of the bridge plug, the dissolving speed is accelerated, meanwhile, the liquid in the well enters each part from each blind hole 20, the dissolving speed is improved, the dissolving time of each part is almost shortened, the whole bridge plug dissolving time is shortened, and the acting efficiency is improved.
Claims (3)
1. The utility model provides a soluble bridging plug that dissolution rate is fast, includes pull rod (1), push pedal (7), taper sleeve (2), slips (3), packing element (4) and guide shoe (5), its characterized in that: the rubber cylinder (4) is sleeved at the outer circle part of the guide shoe (5), the rubber cylinder (4) is positioned at the lower side of the slips (3), check rings (6) are arranged at two sides of the rubber cylinder (4), a cleaning pipe (19) is arranged at the lower part of the check ring (6) at the lower part of the rubber cylinder (4), a compression spring is arranged between the check ring (6) at the lower part of the cleaning pipe (19) and the guide shoe (5), a shaft (8) and a shearing pipe (9) are arranged at the inner side of the rubber cylinder (4), a protruding shear pin I (10) is arranged at the middle part of the shaft (8) and is blocked at the outer side of the shearing pipe (9), and the check ring (6) at two sides is propped against the length direction of an integrated structure formed by the shaft (8) and the shearing pipe (9);
the taper sleeve (2) is connected with the guide shoe (5) through one-way teeth, a ring groove III (17) is formed in the upper part of the taper sleeve (2), an external connecting channel is formed in the position of the ring groove III (17) of the pull rod (1) and is communicated with the outside of the pull rod (1), and a release mechanism (18) is arranged at the position communicated with the outside of the pull rod (1); the middle part of the guide shoe (5) is provided with a ring groove II (16), the guide shoe (5) is provided with an external connecting channel at the ring groove II (16) to be communicated with the outside of the guide shoe (5), a release mechanism (18) is arranged at the communicating part with the outside of the guide shoe (5), the upper part of the ring groove II (16) is provided with a through-flow channel (21), and the through-flow channel (21) is communicated with the inner space of the slip (3);
the release mechanism (18) comprises a piston hole (14) formed in the pull rod (1) and the guide shoe (5), wherein the inner side of the piston hole (14) is communicated with the outer communication channel, a piston (11) is arranged in the piston hole (14), the piston (11) is connected with the piston hole (14) through clearance fit of a sealing ring, a counter bore is drilled in one side of the piston (11), a compression spring and a shear pin II (12) are arranged in the counter bore, a ring groove I (13) is formed in the pull rod (1) and the guide shoe (5), one half of the shear pin II (12) extends into the ring groove I (13), and the compression spring is arranged between the piston (11) and the bottom surface of the piston hole (14);
the slips (3) are provided with a plurality of blind holes (20) from inside to outside, the taper sleeve (2) is provided with a plurality of blind holes (20) from inside to outside of the ring groove III (17), and the guide shoe (5) is provided with a plurality of blind holes (20) which are communicated with the outer communicating channel.
2. A fast dissolving soluble bridge plug according to claim 1, wherein: an oil absorption cotton sliver (22) and sand paper (23) are adhered to the outer side of the cleaning tube (19).
3. A fast dissolving soluble bridge plug according to claim 2, wherein: the pull rod (1), the taper sleeve (2), the guide shoe (5), the slips (3), the retainer ring (6), the push plate (7) and the rubber sleeve (4) are all made of soluble materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210513947.7A CN114961641B (en) | 2022-05-12 | 2022-05-12 | Soluble bridge plug with high dissolution speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210513947.7A CN114961641B (en) | 2022-05-12 | 2022-05-12 | Soluble bridge plug with high dissolution speed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114961641A CN114961641A (en) | 2022-08-30 |
| CN114961641B true CN114961641B (en) | 2024-02-09 |
Family
ID=82971842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210513947.7A Active CN114961641B (en) | 2022-05-12 | 2022-05-12 | Soluble bridge plug with high dissolution speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114961641B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116892378B (en) * | 2023-09-11 | 2023-12-19 | 大庆信辰油田技术服务有限公司 | Soluble bridge plug special for oil and gas well production increase |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1803537C (en) * | 1991-04-22 | 1993-03-23 | Институт Геологии И Разведки Нефтяных И Газовых Месторождений | Squeeze cementing tool for placing cement bridging plugs |
| WO2019090602A1 (en) * | 2017-11-09 | 2019-05-16 | 成都维泰油气能源技术有限公司 | Dissolvable bridge plug |
| CN112096339A (en) * | 2019-06-18 | 2020-12-18 | 中国石油化工股份有限公司 | Automatic packing device for casing |
| CN112127834A (en) * | 2020-09-15 | 2020-12-25 | 张军 | Soluble bridge plug |
| CN215444015U (en) * | 2021-04-27 | 2022-01-07 | 大庆达晟石油科技有限公司 | Composite soluble bridge plug |
| CN114458237A (en) * | 2022-01-19 | 2022-05-10 | 张淞源 | Multifunctional soluble bridge plug |
-
2022
- 2022-05-12 CN CN202210513947.7A patent/CN114961641B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1803537C (en) * | 1991-04-22 | 1993-03-23 | Институт Геологии И Разведки Нефтяных И Газовых Месторождений | Squeeze cementing tool for placing cement bridging plugs |
| WO2019090602A1 (en) * | 2017-11-09 | 2019-05-16 | 成都维泰油气能源技术有限公司 | Dissolvable bridge plug |
| CN112096339A (en) * | 2019-06-18 | 2020-12-18 | 中国石油化工股份有限公司 | Automatic packing device for casing |
| CN112127834A (en) * | 2020-09-15 | 2020-12-25 | 张军 | Soluble bridge plug |
| CN215444015U (en) * | 2021-04-27 | 2022-01-07 | 大庆达晟石油科技有限公司 | Composite soluble bridge plug |
| CN114458237A (en) * | 2022-01-19 | 2022-05-10 | 张淞源 | Multifunctional soluble bridge plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114961641A (en) | 2022-08-30 |
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