CN116122766B - Quick-release type soluble bridge plug - Google Patents
Quick-release type soluble bridge plug Download PDFInfo
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- CN116122766B CN116122766B CN202111350260.8A CN202111350260A CN116122766B CN 116122766 B CN116122766 B CN 116122766B CN 202111350260 A CN202111350260 A CN 202111350260A CN 116122766 B CN116122766 B CN 116122766B
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- clamping strip
- limit clamping
- split
- strip
- half ring
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- 238000007789 sealing Methods 0.000 claims abstract description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 239000002195 soluble material Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 abstract description 5
- 239000003208 petroleum Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction 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
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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)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention relates to the technical field of petroleum exploitation, in particular to a quick-release type soluble bridge plug which comprises a central shaft, an upper cone, a sealing ring, slips, a seat sealing ring and a lower cone, wherein the central shaft comprises an upper central body, a middle central body and a lower central body which are sequentially spliced together from top to bottom, the upper cone is sleeved outside the upper central body, the slips are sleeved outside the middle central body, the lower cone is sleeved outside the lower central body, the lower part of the upper cone is in a truncated cone shape with the upper part being large and the lower part being small, the sealing ring is arranged outside the lower part of the upper cone, the upper end of the slips is positioned outside the lower end of the upper cone, and the upper part of the lower cone is in a truncated cone shape with the upper part being small and the lower part being large. The invention has reasonable and compact structure and ingenious conception, and the first and second limiting clamping strips can be mutually close after being dissolved by arranging the first and second fixing strips between the first and second limiting clamping strips, so that the outer diameter of the upper central body is reduced; the upper cone, the sealing ring, the slips, the seat sealing ring and the lower cone are disassembled and scattered to the bottom of the well to be fully dissolved by reducing the outer diameter of the upper central body, and the device has the characteristics of stability, easy dissolution and easy disassembly.
Description
Technical Field
The invention relates to the technical field of petroleum exploitation, in particular to a quick-release type soluble bridge plug.
Background
With the development of global oil and gas fields and the continuous exhaustion of energy sources, unconventional oil and gas will become an important successor of petroleum and natural gas energy sources in the future. However, the unconventional petroleum reservoir has the characteristics of high specific gravity, more impurities, high viscosity and low pore and extremely low permeability, so that the exploitation cost of the oil gas is high, but along with the reduction of conventional oil gas resources and the increase of production cost, the development and the utilization of the unconventional oil gas are more and more emphasized. For the exploitation of such unconventional reservoirs, reservoir reformation can be performed first to effectively increase single well production. Fracturing and other techniques are commonly used at present.
In the petroleum field, fracturing refers to a method for forming cracks on an oil and gas layer by utilizing the action of hydraulic power or high-energy gas in the oil and gas production process, and is characterized in that the fracturing artificially cracks the stratum, improves the flowing environment of oil and gas in the underground, increases the yield of an oil and gas well, and plays a very important role in improving the flowing condition of a well bottom, the flowing condition of an oil layer and the like.
In the fracturing process, firstly, a fracturing tool such as a bridge plug, a sliding sleeve, a divider and the like is put into the well, then the well is pressurized, the slips are fixed in a certain section of an oil-gas well, the slips are embedded on the inner wall of the shaft under the pressure of up to 70MPa, and rubber is fully compressed to seal and isolate the well section, so that the fracturing operation can be completed smoothly. After fracturing is completed, in order to achieve the full drift diameter of the well bore and ensure the yield of oil gas, the fracturing tool needs to be dismantled. Existing conventional demolition methods may include direct drilling. However, because the fracturing tools remain in the well for a longer length and a greater number, drilling is time consuming and delays the later production of the oil and gas well.
Based on the dismantling bridge plug, the soluble bridge plug can be completely dissolved or degraded by oneself in the pit after fracturing to form small particles and fragments, and the small particles and fragments are returned to the ground together with a fracturing tool or pushed into the pit through a flowback process, but under complex underground conditions, the dissolving effect of the soluble bridge plug is not ideal, the well fluid serving as dissolving fluid is insufficient under the condition of more underground sand setting, the dissolving progress is influenced, and in particular, the well fluid lack even caused by insufficient well fluid flow caused by underground sand setting can further influence the dissolving effect in a gas producing layer.
Disclosure of Invention
The invention provides a quick-dissolution type soluble bridge plug, which overcomes the defects of the prior art and can effectively solve the problem of poor dissolution effect of the prior soluble bridge plug.
The technical scheme of the invention is realized by the following measures: the quick-release type soluble bridge plug comprises a central shaft, an upper cone, a sealing ring, slips, a seat sealing ring and a lower cone, wherein the central shaft comprises an upper central body, a middle central body and a lower central body which are sequentially inserted from top to bottom; the upper center body comprises a first front half cylinder body, a first rear half cylinder body, a first limit clamping strip, a second limit clamping strip, a third limit clamping strip, a fourth limit clamping strip, a first fixed strip, a second fixed strip, a third fixed strip and a fourth fixed strip, wherein the first limit clamping strip is fixedly arranged at the rear side of the left part of the first front half cylinder body, the second limit clamping strip which is clamped with the first limit clamping strip is fixedly arranged at the front side of the left part of the first rear half cylinder body, the first limit clamping strip is in a U shape with a forward opening, the second limit clamping strip is in a U shape with a backward opening, the right part of the first limit clamping strip is positioned in the second limit clamping strip, the left part of the second limit clamping strip is positioned in the first limit clamping strip, the first fixed strip is arranged between the left part of the first limit clamping strip and the left part of the second limit clamping strip, and the second fixed strip is arranged between the right part of the first limit clamping strip and the right part of the second limit clamping strip; the right side of the first front half cylinder body is fixedly provided with a third limit clamping strip, the front side of the right part of the first rear half cylinder body is fixedly provided with a fourth limit clamping strip clamped with the third limit clamping strip, the third limit clamping strip is U-shaped with a forward opening, the fourth limit clamping strip is U-shaped with a backward opening, the left part of the third limit clamping strip is positioned in the fourth limit clamping strip, the right part of the fourth limit clamping strip is positioned in the third limit clamping strip, a third fixing strip is arranged between the left part of the third limit clamping strip and the left part of the fourth limit clamping strip, and a fourth fixing strip is arranged between the right part of the third limit clamping strip and the right part of the fourth limit clamping strip; the first fixing strip, the second fixing strip, the third fixing strip and the fourth fixing strip are made of sulfuric acid soluble materials, and acid bags capable of storing sulfuric acid are arranged at the upper ends of the first fixing strip, the second fixing strip, the third fixing strip and the fourth fixing strip; the middle central body consists of a plurality of mutually embedded sixth split bodies, and the lower central body consists of a plurality of mutually embedded seventh split bodies.
The following are further optimizations and/or improvements to the above-described inventive solution:
The upper cone can be composed of four first split bodies which are mutually embedded, one end of each first split body is provided with a first V-shaped opening, the other end of each first split body is provided with a first V-shaped block matched with the first V-shaped opening, and the first V-shaped block on each first split body is positioned in the first V-shaped opening of the adjacent first split body; the lower cone is composed of four mutually embedded fifth split bodies, one end of each fifth split body is provided with a second V-shaped opening, the other end of each fifth split body is provided with a second V-shaped block matched with the second V-shaped opening, and the second V-shaped block on each fifth split body is positioned in the second V-shaped opening of the adjacent fifth split body.
The sealing ring can be composed of two second split bodies which are mutually embedded, wherein the second split body positioned at the front part is a first front half ring body, the second split body positioned at the rear part is a first rear half ring body, a first L-shaped opening is formed in the outer side of the rear end of the left part of the first front half ring body, a first L-shaped block positioned in the first L-shaped opening is formed in the outer side of the front end of the left part of the first rear half ring body, a second L-shaped opening is formed in the inner side of the rear end of the right part of the first front half ring body, and a second L-shaped block positioned in the second L-shaped opening is formed in the inner side of the front end of the right part of the first rear half ring body; the slip consists of two mutually embedded third split bodies, the third split body positioned at the front part is a second front half ring body, the third split body positioned at the rear part is a second rear half ring body, a third L-shaped opening is formed in the outer side of the rear end of the left part of the second front half ring body, a third L-shaped block positioned in the third L-shaped opening is formed in the outer side of the front end of the left part of the second rear half ring body, a fourth L-shaped opening is formed in the inner side of the rear end of the right part of the second front half ring body, and a fourth L-shaped block positioned in the fourth L-shaped opening is formed in the inner side of the front end of the right part of the second rear half ring body; the seat seal ring is composed of two fourth split bodies which are mutually embedded, the fourth split body positioned at the front part is a third front half ring body, the fourth split body positioned at the rear part is a third rear half ring body, a fifth L-shaped opening is formed in the outer side of the rear end of the left part of the third front half ring body, a fifth L-shaped block positioned in the fifth L-shaped opening is formed in the outer side of the front end of the left part of the third rear half ring body, a sixth L-shaped opening is formed in the inner side of the rear end of the right part of the third front half ring body, and a sixth L-shaped block positioned in the sixth L-shaped opening is formed in the inner side of the front end of the right part of the third rear half ring body.
The central body can be composed of two mutually embedded sixth split bodies, and the projection of the embedded sixth split bodies on the horizontal plane is trapezoidal or wedge-shaped; the lower central body consists of two seventh split bodies which are mutually embedded, and the projection of the seventh split bodies embedded in the horizontal plane is trapezoidal or wedge-shaped.
The device also comprises a first inserted link and a second inserted link, wherein the upper side of each sixth split body is provided with at least one first inserted link, and the lower side of the central body corresponding to the position of the first inserted link is provided with a first jack; at least one second inserted link is arranged on the upper side of each seventh split body, and a first jack is arranged on the lower side of the central body in the position corresponding to the second inserted link.
The invention has reasonable and compact structure and ingenious conception, and the first limiting clamping strip and the second limiting clamping strip are mutually close and the third limiting clamping strip and the fourth limiting clamping strip are mutually close after the first fixing strip, the second fixing strip, the third fixing strip and the fourth fixing strip are dissolved by arranging the first fixing strip and the second fixing strip between the first limiting clamping strip and the second limiting clamping strip and arranging the third fixing strip and the fourth fixing strip between the third limiting clamping strip and the fourth limiting clamping strip, so that the outer diameter of the upper central body is reduced; the upper cone, the sealing ring, the slips, the seat sealing ring and the lower cone are disassembled and scattered to the bottom of the well to be fully dissolved by reducing the outer diameter of the upper central body, and the device has the characteristics of stability, easy dissolution and easy disassembly.
Drawings
Fig. 1 is a schematic diagram of a front view of a preferred embodiment of the present invention.
Fig. 2 is a schematic top view of the upper cone of fig. 1.
FIG. 3 is a schematic bottom view of the seal ring of FIG. 1.
Fig. 4 is a schematic top cross-sectional view of the upper hub of fig. 1.
Fig. 5 is an exploded view of the central shaft of fig. 1.
The codes in the drawings are respectively: 1 is a first front half cylinder body, 2 is a first rear half cylinder body, 3 is a first limit clamping strip, 4 is a second limit clamping strip, 5 is a first fixing strip, 6 is a second fixing strip, 7 is a first split body, 8 is a first V-shaped block, 9 is a slip, 10 is a seat seal ring, 11 is a lower cone, 12 is a first inserting rod, 13 is a second inserting rod, 14 is a first inserting hole, 15 is a second inserting hole, 16 is a first front half cylinder body, 17 is a first rear half cylinder body, 18 is a first L-shaped block, 19 is a second L-shaped block, 20 is a middle center body, and 21 is a lower center body.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The invention is further described below with reference to examples and figures:
As shown in fig. 1 to 5, the quick-release type soluble bridge plug comprises a central shaft, an upper cone, a sealing ring, slips 9, a seat sealing ring 10 and a lower cone 11, wherein the central shaft comprises an upper central body, a middle central body 20 and a lower central body 21 which are sequentially spliced together from top to bottom, the upper cone is sleeved outside the upper central body, the slips 9 are sleeved outside the middle central body 20, the lower cone 11 is sleeved outside the lower central body 21, the lower part of the upper cone is in a truncated cone shape with a big end down, the sealing ring is arranged outside the lower part of the upper cone, the upper end of the slips 9 is positioned outside the upper end of the lower cone 11, the lower part of the lower cone 11 is in a truncated cone shape with a small top down, the seat sealing ring 10 is arranged outside the upper part of the lower cone 11, the upper cone is composed of a plurality of first split bodies 7 which are mutually embedded, the sealing ring is composed of a plurality of second split bodies which are mutually embedded, the slips 9 is composed of a plurality of third split bodies which are mutually embedded, and the seat sealing ring 10 is composed of a plurality of fourth split bodies which are mutually embedded, and the lower cone 11 is composed of a plurality of fifth split bodies which are mutually embedded; the upper center body comprises a first front half cylinder body 1, a first rear half cylinder body 2, a first limit clamping strip 3, a second limit clamping strip 4, a third limit clamping strip, a fourth limit clamping strip, a first fixing strip 5, a second fixing strip 6, a third fixing strip and a fourth fixing strip, wherein the first limit clamping strip 3 is fixedly arranged at the rear side of the left part of the first front half cylinder body 1, the second limit clamping strip 4 which is clamped with the first limit clamping strip 3 is fixedly arranged at the front side of the left part of the first rear half cylinder body 2, the first limit clamping strip 3 is in a U shape with a forward opening, the second limit clamping strip 4 is in a U shape with a backward opening, the right part of the first limit clamping strip 3 is positioned in the second limit clamping strip 4, the left part of the second limit clamping strip 4 is positioned in the first limit clamping strip 3, the first fixing strip 5 is arranged between the left part of the first limit clamping strip 3 and the left part of the second limit clamping strip 4, and the second fixing strip 6 is arranged between the right part of the first limit clamping strip 3 and the right part of the second limit clamping strip 4; the right rear side of the first front half cylinder body 1 is fixedly provided with a third limit clamping strip, the front side of the right part of the first rear half cylinder body 2 is fixedly provided with a fourth limit clamping strip which is clamped with the third limit clamping strip, the third limit clamping strip is in a U shape with a forward opening, the fourth limit clamping strip is in a U shape with a backward opening, the left part of the third limit clamping strip is positioned in the fourth limit clamping strip, the right part of the fourth limit clamping strip is positioned in the third limit clamping strip, a third fixing strip is arranged between the left part of the third limit clamping strip and the left part of the fourth limit clamping strip, and a fourth fixing strip is arranged between the right part of the third limit clamping strip and the right part of the fourth limit clamping strip; the first fixing strip 5, the second fixing strip 6, the third fixing strip and the fourth fixing strip are made of sulfuric acid soluble materials, and acid bags capable of storing sulfuric acid are arranged at the upper ends of the first fixing strip 5, the second fixing strip 6, the third fixing strip and the fourth fixing strip; the center body 20 is composed of a plurality of mutually fitted sixth split bodies, and the lower center body 21 is composed of a plurality of mutually fitted seventh split bodies. In the use process, the first fixing strip 5 and the second fixing strip 6 are arranged between the first limiting clamping strip 3 and the second limiting clamping strip 4, and the third fixing strip and the fourth fixing strip are arranged between the third limiting clamping strip and the fourth limiting clamping strip, so that the first limiting clamping strip 3 and the second limiting clamping strip 4 are mutually close and the third limiting clamping strip and the fourth limiting clamping strip are mutually close after the first fixing strip 5, the second fixing strip 6, the third fixing strip and the fourth fixing strip are dissolved, and the outer diameter of the upper central body is reduced; through reducing the external diameter of the upper central body, the upper cone, the sealing ring, the slips 9, the seat sealing ring 10 and the lower cone 11 are disassembled and scattered to the bottom of the well to be fully dissolved, so that the problem of poor dissolving effect of the existing soluble bridge plug is effectively solved. The central shaft, upper cone, sealing ring, slips 9, seat seal ring 10 and lower cone 11 are all of soluble materials as required.
The rapid-dissolution type soluble bridge plug can be further optimized or/and improved according to actual needs:
As shown in fig. 1 to 5, the upper cone is composed of four first split bodies 7 which are mutually embedded, one end of each first split body 7 is provided with a first V-shaped opening, the other end of each first split body 7 is provided with a first V-shaped block 8 matched with the first V-shaped opening, and the first V-shaped block 8 on each first split body 7 is positioned in the first V-shaped opening of the adjacent first split body 7; the lower cone 11 is composed of four mutually embedded fifth split bodies, one end of each fifth split body is provided with a second V-shaped opening, the other end of each fifth split body is provided with a second V-shaped block matched with the second V-shaped opening, and the second V-shaped block on each fifth split body is positioned in the second V-shaped opening of the adjacent fifth split body. In use, the upper and lower cones 11 are conveniently disintegrated by such an arrangement.
As shown in fig. 1 to 5, the sealing ring is composed of two second split bodies which are mutually embedded, the second split body positioned at the front part is a first front half ring body 16, the second split body positioned at the rear part is a first rear half ring body 17, a first L-shaped opening is arranged at the outer side of the rear end of the left part of the first front half ring body 16, a first L-shaped block 18 positioned in the first L-shaped opening is arranged at the outer side of the front end of the left part of the first rear half ring body 17, a second L-shaped opening is arranged at the inner side of the rear end of the right part of the first front half ring body 16, and a second L-shaped block 19 positioned in the second L-shaped opening is arranged at the inner side of the front end of the right part of the first rear half ring body 17; the slip 9 is composed of two mutually embedded third split bodies, the third split body positioned at the front part is a second front half ring body, the third split body positioned at the rear part is a second rear half ring body, a third L-shaped opening is formed at the outer side of the rear end of the left part of the second front half ring body, a third L-shaped block positioned in the third L-shaped opening is formed at the outer side of the front end of the left part of the second rear half ring body, a fourth L-shaped opening is formed at the inner side of the rear end of the right part of the second front half ring body, and a fourth L-shaped block positioned in the fourth L-shaped opening is formed at the inner side of the front end of the right part of the second rear half ring body; the seat seal ring 10 is composed of two fourth split bodies which are mutually embedded, the fourth split body positioned at the front part is a third front half ring body, the fourth split body positioned at the rear part is a third rear half ring body, a fifth L-shaped opening is formed in the outer side of the rear end of the left part of the third front half ring body, a fifth L-shaped block positioned in the fifth L-shaped opening is formed in the outer side of the front end of the left part of the third rear half ring body, a sixth L-shaped opening is formed in the inner side of the rear end of the right part of the third front half ring body, and a sixth L-shaped block positioned in the sixth L-shaped opening is formed in the inner side of the front end of the right part of the third rear half ring body. In use, disassembly of the seal ring, slips 9 and seat ring 10 is facilitated by such an arrangement.
As shown in fig. 1 to 5, the central body 20 is composed of two mutually embedded sixth split bodies, and the projection of the embedded sixth split bodies on the horizontal plane is trapezoid or wedge; the lower central body 21 is composed of two seventh split bodies which are mutually embedded, and the projection of the seventh split bodies embedded in the horizontal plane is trapezoidal or wedge-shaped. In use, the central body 20 and the lower central body 21 are facilitated to be disassembled by such an arrangement.
As shown in fig. 1 to 5, the device further comprises a first inserted link 12 and a second inserted link 13, wherein at least one first inserted link 12 is arranged on the upper side of each sixth split body, and a first jack 14 is arranged on the lower side of the central body corresponding to the position of the first inserted link 12; at least one second inserted link 13 is arranged on the upper side of each seventh split body, and a first jack 14 is arranged on the lower side of the central body 20 in the position corresponding to the second inserted link 13. In the use process, the central tube is convenient to disassemble by the arrangement.
The technical characteristics form the optimal embodiment of the invention, have stronger adaptability and optimal implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (8)
1. The quick-release type soluble bridge plug is characterized by comprising a central shaft, an upper cone, a sealing ring, slips, a seat sealing ring and a lower cone, wherein the central shaft comprises an upper central body, a middle central body and a lower central body which are sequentially inserted from top to bottom; the upper center body comprises a first front half cylinder body, a first rear half cylinder body, a first limit clamping strip, a second limit clamping strip, a third limit clamping strip, a fourth limit clamping strip, a first fixed strip, a second fixed strip, a third fixed strip and a fourth fixed strip, wherein the first limit clamping strip is fixedly arranged at the rear side of the left part of the first front half cylinder body, the second limit clamping strip which is clamped with the first limit clamping strip is fixedly arranged at the front side of the left part of the first rear half cylinder body, the first limit clamping strip is in a U shape with a forward opening, the second limit clamping strip is in a U shape with a backward opening, the right part of the first limit clamping strip is positioned in the second limit clamping strip, the left part of the second limit clamping strip is positioned in the first limit clamping strip, the first fixed strip is arranged between the left part of the first limit clamping strip and the left part of the second limit clamping strip, and the second fixed strip is arranged between the right part of the first limit clamping strip and the right part of the second limit clamping strip; the right side of the first front half cylinder body is fixedly provided with a third limit clamping strip, the front side of the right part of the first rear half cylinder body is fixedly provided with a fourth limit clamping strip clamped with the third limit clamping strip, the third limit clamping strip is U-shaped with a forward opening, the fourth limit clamping strip is U-shaped with a backward opening, the left part of the third limit clamping strip is positioned in the fourth limit clamping strip, the right part of the fourth limit clamping strip is positioned in the third limit clamping strip, a third fixing strip is arranged between the left part of the third limit clamping strip and the left part of the fourth limit clamping strip, and a fourth fixing strip is arranged between the right part of the third limit clamping strip and the right part of the fourth limit clamping strip; the first fixing strip, the second fixing strip, the third fixing strip and the fourth fixing strip are made of sulfuric acid soluble materials, and acid bags capable of storing sulfuric acid are arranged at the upper ends of the first fixing strip, the second fixing strip, the third fixing strip and the fourth fixing strip; the middle central body consists of a plurality of mutually embedded sixth split bodies, and the lower central body consists of a plurality of mutually embedded seventh split bodies.
2. The quick release type soluble bridge plug of claim 1, wherein the upper cone is composed of four first split bodies which are mutually embedded, one end of each first split body is provided with a first V-shaped opening, the other end of each first split body is provided with a first V-shaped block matched with the first V-shaped opening, and the first V-shaped block on each first split body is positioned in the first V-shaped opening of the adjacent first split body; the lower cone is composed of four mutually embedded fifth split bodies, one end of each fifth split body is provided with a second V-shaped opening, the other end of each fifth split body is provided with a second V-shaped block matched with the second V-shaped opening, and the second V-shaped block on each fifth split body is positioned in the second V-shaped opening of the adjacent fifth split body.
3. The quick-release type soluble bridge plug according to claim 1 or 2, wherein the sealing ring consists of two mutually embedded second split bodies, the second split bodies positioned at the front part are first front half ring bodies, the second split bodies positioned at the rear part are first rear half ring bodies, the outer side of the rear end of the left part of the first front half ring body is provided with a first L-shaped opening, the outer side of the front end of the left part of the first rear half ring body is provided with a first L-shaped block positioned in the first L-shaped opening, the inner side of the rear end of the right part of the first front half ring body is provided with a second L-shaped opening, and the inner side of the front end of the right part of the first rear half ring body is provided with a second L-shaped block positioned in the second L-shaped opening; the slip consists of two mutually embedded third split bodies, the third split body positioned at the front part is a second front half ring body, the third split body positioned at the rear part is a second rear half ring body, a third L-shaped opening is formed in the outer side of the rear end of the left part of the second front half ring body, a third L-shaped block positioned in the third L-shaped opening is formed in the outer side of the front end of the left part of the second rear half ring body, a fourth L-shaped opening is formed in the inner side of the rear end of the right part of the second front half ring body, and a fourth L-shaped block positioned in the fourth L-shaped opening is formed in the inner side of the front end of the right part of the second rear half ring body; the seat seal ring is composed of two fourth split bodies which are mutually embedded, the fourth split body positioned at the front part is a third front half ring body, the fourth split body positioned at the rear part is a third rear half ring body, a fifth L-shaped opening is formed in the outer side of the rear end of the left part of the third front half ring body, a fifth L-shaped block positioned in the fifth L-shaped opening is formed in the outer side of the front end of the left part of the third rear half ring body, a sixth L-shaped opening is formed in the inner side of the rear end of the right part of the third front half ring body, and a sixth L-shaped block positioned in the sixth L-shaped opening is formed in the inner side of the front end of the right part of the third rear half ring body.
4. The rapid-release type soluble bridge plug according to claim 1 or 2, wherein the central body is composed of two mutually-engaged sixth split bodies, and the projection of the sixth split bodies at the horizontal plane is trapezoid or wedge-shaped; the lower central body consists of two seventh split bodies which are mutually embedded, and the projection of the seventh split bodies embedded in the horizontal plane is trapezoidal or wedge-shaped.
5. A rapid-release type soluble bridge plug according to claim 3, wherein the central body is composed of two mutually-engaged sixth split bodies, and the projection of the sixth split bodies at the horizontal plane is trapezoidal or wedge-shaped; the lower central body consists of two seventh split bodies which are mutually embedded, and the projection of the seventh split bodies embedded in the horizontal plane is trapezoidal or wedge-shaped.
6. The quick release type soluble bridge plug as claimed in claim 1,2 or 5, further comprising a first insert rod and a second insert rod, wherein at least one first insert rod is arranged on the upper side of each sixth split body, and a first jack is arranged on the lower side of the central body on the position corresponding to the first insert rod; at least one second inserted link is arranged on the upper side of each seventh split body, and a first jack is arranged on the lower side of the central body in the position corresponding to the second inserted link.
7. The quick release type soluble bridge plug of claim 3, further comprising a first insert rod and a second insert rod, wherein at least one first insert rod is arranged on the upper side of each sixth split body, and a first jack is arranged on the lower side of the central body corresponding to the position of the first insert rod; at least one second inserted link is arranged on the upper side of each seventh split body, and a first jack is arranged on the lower side of the central body in the position corresponding to the second inserted link.
8. The quick release type bridge plug according to claim 4, further comprising a first insert rod and a second insert rod, wherein at least one first insert rod is arranged on the upper side of each sixth split body, and a first jack is arranged on the lower side of the central body corresponding to the position of the first insert rod; at least one second inserted link is arranged on the upper side of each seventh split body, and a first jack is arranged on the lower side of the central body in the position corresponding to the second inserted link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111350260.8A CN116122766B (en) | 2021-11-15 | 2021-11-15 | Quick-release type soluble bridge plug |
Applications Claiming Priority (1)
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| US9097093B1 (en) * | 2012-01-06 | 2015-08-04 | Cavin B. Frost | Downhole chemical treatment assembly for use in a downhole wellbore |
| WO2016101374A1 (en) * | 2014-12-26 | 2016-06-30 | 杰瑞能源服务有限公司 | Bridge plug having large drift diameter and setting method thereof |
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| CN116122766A (en) | 2023-05-16 |
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