CN111648739A - Rubber sleeve protection type soluble bridge plug for fracturing - Google Patents
Rubber sleeve protection type soluble bridge plug for fracturing Download PDFInfo
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- CN111648739A CN111648739A CN202010605137.5A CN202010605137A CN111648739A CN 111648739 A CN111648739 A CN 111648739A CN 202010605137 A CN202010605137 A CN 202010605137A CN 111648739 A CN111648739 A CN 111648739A
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- pull rod
- connector
- slip
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- 238000001125 extrusion Methods 0.000 claims abstract description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims 1
- 238000012856 packing Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000004090 dissolution Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
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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
- 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
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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
- 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
-
- 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
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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)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention relates to the technical field of underground bridge plugs, in particular to a rubber sleeve protection type soluble bridge plug for fracturing, which comprises a pull rod, a guide cone, a slip, a connector, a connecting body, a rubber sleeve, an end ring, a starting shear pin and a releasing shear pin, wherein the guide cone is arranged on the outer side of the lower end of the pull rod, a limiting ring table is arranged on the outer side of the lower end of the guide cone, and the releasing shear pin capable of fixedly mounting the guide cone and the pull rod together is arranged on the outer side of the limiting ring table; the slips of which the lower end seat is arranged on the upper side of the limit ring table are arranged on the outer side of the upper part of the guide cone, and the inner side of the upper part of the slips can be radially outwards expanded when being subjected to outwards extrusion force. The invention has reasonable and compact structure and convenient use, reduces the formation of floccules after the rubber cylinder is dissolved by arranging the short rubber cylinder at the outer side of the lower conical section, reduces the risks of blockage in the midway of entering a well and wellhead blockage caused by the dissolution of the rubber cylinder and is beneficial to flowback; through setting up the end ring, can protect the lower extreme of packing element, avoid going into the well and meet the resistance midway and damage the packing element, have the characteristics of easy dissolving, reliable and stable and sealed effectual.
Description
Technical Field
The invention relates to the technical field of underground bridge plugs, in particular to a rubber cylinder protection type soluble bridge plug for fracturing.
Background
Among the remaining oil and gas resources in China, 80% are low-grade resources, which are unconventional resources represented by shale gas and dense oil. The development difficulty of low-grade resources is high, and the requirement on engineering technology is high. In order to further release the potential of stratum resources and improve the yield of oil and gas, bridge plug-perforation combined fracturing becomes a mainstream technology for unconventional oil and gas reservoir transformation. Soluble bridge plugs are the core product of bridge plug-perforation combined fracturing.
At present, the conventional soluble bridge plug generally adopts aluminum magnesium alloy and soluble rubber materials, and the two materials can be electrolyzed and degraded in a certain mineralization degree and temperature environment in an oil and gas well to finally disintegrate and dissolve. Therefore, drilling is not needed, and a large amount of operation cost is saved. However, when the conventional soluble bridge plug uses the compression of the sealing rubber cylinder to realize interlayer packing, the problems of well head blockage and unfavorable flowback caused by midway blockage of the bridge plug and dissolution of the rubber cylinder are easy to occur because the whole tool and the rubber cylinder are longer. In addition, the end part of the rubber cylinder is easy to damage when the rubber cylinder is blocked midway in the well, and the sealing effect is influenced.
Disclosure of Invention
The invention provides a soluble bridge plug for rubber sleeve protection type fracturing, overcomes the defects of the prior art, and can effectively solve the problems that the existing soluble bridge plug is too long in size and a wellhead is easily blocked after a rubber sleeve is dissolved.
The technical scheme of the invention is realized by the following measures: a soluble bridge plug for rubber sleeve protection type fracturing comprises a pull rod, a guide cone, slips, a connector, a connecting body, a rubber sleeve, an end ring, a starting shear pin and a releasing shear pin, wherein the guide cone is arranged on the outer side of the lower end of the pull rod, a limiting ring table is arranged on the outer side of the lower end of the guide cone, and the releasing shear pin capable of fixedly mounting the guide cone and the pull rod together is arranged on the outer side of the limiting ring table; the outer side of the upper part of the guide cone is provided with a slip with a lower end seat on the upper side of the limit ring table, and the inner side of the upper part of the slip can be radially expanded outwards when being subjected to outwards extrusion force; a connector is fixedly arranged on the outer side of the middle part of the pull rod, and a push cylinder with the upper part positioned above the pull rod is sleeved on the outer side of the upper part of the connector; the outer side of the lower part of the connector is provided with a connecting body sleeved on the outer side of the lower part of the pull rod, the connecting body comprises an upper mounting section and a lower conical section which are fixedly mounted together from top to bottom, the upper end of the upper mounting section and the lower end of the connector are fixedly mounted together through a starting shear pin, the lower conical section is in a circular truncated cone shape with a large upper part and a small lower part, the lower end of the lower conical section is positioned on the inner side of the upper part of the slip, the outer side of the lower part of the lower conical section corresponding to the position above the slip is sleeved with an; the pull rod, the guide cone, the slips, the end ring, the connector and the connecting body can be dissolved in a chlorine-containing solution.
The following is further optimization or/and improvement of the technical scheme of the invention:
the end ring comprises an upper end ring, a middle end ring and a lower end ring which are sleeved on the outer side of the lower portion of the lower conical section from top to bottom in sequence, the upper end ring, the middle end ring and the lower end ring are all C-shaped rings, and projections of openings of the upper end ring, openings of the middle end ring and openings of the lower end ring on a horizontal plane are uniformly distributed along the circumference.
The inner side of the upper part of the slip can be provided with a lower frustum hole matched with the lower frustum section, and the lower frustum hole is in a circular truncated cone shape with a large upper part and a small lower part.
The slip can also comprise slip teeth, and the slip teeth are distributed on the outer side of the slip along the circumference.
An upper straight hole section and an upper frustum hole which are sequentially communicated from top to bottom can be arranged in the upper mounting section, a lower straight hole section which is communicated from top to bottom is arranged in the lower frustum section, the upper frustum hole is in a circular truncated cone shape with a large upper part and a small lower part, the inner diameter of the upper straight hole section is larger than that of the upper end of the upper frustum hole, and the inner diameter of the lower end of the upper frustum hole is equal to that of the lower straight hole section; the lower end of the connector is seated at the lower end of the upper straight hole section.
The device also comprises a mounting assembly, wherein the mounting assembly comprises an adapter and a locking spring, the adapter is fixedly mounted on the outer side of the upper end of the pull rod through threaded connection, and the locking spring is arranged between the inner side of the lower end of the adapter and the outer side of the upper part of the pull rod; the outer side of the upper end of the adapter is provided with an external thread.
The pull rod can further comprise a fastening screw, the outer side of the middle of the pull rod is fixedly provided with a connector through threaded connection, and the outer side of the connector is provided with the fastening screw capable of fixedly mounting the connector and the pull rod together.
The invention has reasonable and compact structure and convenient use, reduces the formation of floccules after the rubber cylinder is dissolved by arranging the short rubber cylinder at the outer side of the lower conical section, reduces the risks of blockage in the midway of entering a well and wellhead blockage caused by the dissolution of the rubber cylinder and is beneficial to flowback; through setting up the end ring, can protect the lower extreme of packing element, avoid going into the well and meet the resistance midway and damage the packing element, have the characteristics of easy dissolving, reliable and stable and sealed effectual.
Drawings
FIG. 1 is a schematic sectional view of the preferred embodiment of the present invention.
The codes in the figures are respectively: the device comprises a pull rod 1, a guide cone 2, a slip 3, a connector 4, an upper installation section 5, a lower cone section 6, a rubber cylinder 7, a starting shear pin 8, a releasing shear pin 9, a limit ring table 10, slip teeth 11, a conversion joint 12, a locking spring 13, a fastening screw 14, an upper cone table hole 15, an upper end ring 16, a middle end ring 17 and a lower end ring 18.
Detailed Description
The invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and drawings:
as shown in the attached drawing 1, the soluble bridge plug for the rubber sleeve protection type fracturing comprises a pull rod 1, a guide cone 2, a slip 3, a connector 4, a connecting body, a rubber sleeve 7, an end ring, a starting shear pin 8 and a releasing shear pin 9, wherein the guide cone 2 is arranged on the outer side of the lower end of the pull rod 1, a limiting ring table 10 is arranged on the outer side of the lower end of the guide cone 2, and the releasing shear pin 9 capable of fixedly mounting the guide cone 2 and the pull rod 1 together is arranged on the outer side of the limiting ring table 10; the outer side of the upper part of the guide cone 2 is provided with a slip 3 with a lower end seat at the upper side of the limit ring table 10, and the inner side of the upper part of the slip 3 can be radially expanded outwards when being subjected to outward extrusion force; a connector 4 is fixedly arranged on the outer side of the middle part of the pull rod 1, and a push cylinder with the upper part positioned above the pull rod 1 is sleeved on the outer side of the upper part of the connector 4; the outer side of the lower part of the connector 4 is provided with a connecting body sleeved on the outer side of the lower part of the pull rod 1, the connecting body comprises an upper mounting section 5 and a lower conical section 6 which are fixedly mounted together from top to bottom, the upper end of the upper mounting section 5 and the lower end of the connector 4 are fixedly mounted together through a starting shear pin 8, the lower conical section 6 is in a circular truncated cone shape with a large upper part and a small lower part, the lower end of the lower conical section 6 is positioned on the inner side of the upper part of the slip 3, the outer side of the lower part of the lower conical section 6 corresponding to the position above the slip 3 is sleeved with an end; the pull rod 1, the guide cone 2, the slips 3, the end ring, the connector 4 and the connection body are all soluble in a chlorine-containing solution.
According to the requirement, the pull rod 1, the guide cone 2, the slips 3, the connector 4 and the connecting body are all made of the existing known materials, such as aluminum magnesium alloy materials and the like; the rubber cylinder 7 is made of a known soluble rubber material; in addition, the slips 3 are the prior known technology, such as a slotted integral slip 3, and have the characteristics of ensuring maximum stress dispersion, reliable suspension and small casing damage; the end ring is a well-known technique and may be a split ring, such as a C-ring. In the using process, the rubber cylinder 7 with small length is arranged on the outer side of the lower conical section 6, so that the formation of floccules after the rubber cylinder 7 is dissolved is reduced, the risk of wellhead blockage caused by blockage during the process of entering a well and after the rubber cylinder 7 is dissolved is reduced, flowback is facilitated, and the invention with a compact structure has lower manufacturing cost and very remarkable technical and economic advantages; by arranging the end ring, the lower end of the rubber cylinder 7 can be protected, and the rubber cylinder 7 is prevented from being damaged by resistance in the midway of entering a well.
The specific implementation process of the invention is as follows:
(1) the upper end of a pull rod 1 and the lower end of a seat sealing tool are fixedly arranged together, the outer side of a push cylinder and a seat sealing tool shell are fixedly arranged together, and a guide cone 2 and an adapter are fixedly arranged together;
(2) the pull rod 1 is lifted up by the seat sealing tool, the push cylinder cannot move upwards along with the pull rod 1 under the action of the seat sealing tool, and therefore the shear pin 8 is started to be sheared;
(3) the slips 3 moving upwards along with the pull rod 1 are expanded radially outwards at the upper part under the action of the outer side of the lower conical section 6 and clamped on the inner wall of the casing to complete seat hanging, and meanwhile, the rubber cylinder 7 moves upwards along the outer side of the lower conical section 6 under the action of the upper end of the slips 3, gradually expands and is attached to the inner wall of the casing to complete sealing of the inner wall of the casing;
(4) the pulling force of the pull rod 1 is continuously increased, the guide cone 2 cannot move upwards along with the pull rod 1 under the action of the expanded rubber cylinder 7 and the broken slip 3, so that the releasing shear pin 9 is sheared, and the pull rod 1 is pulled out to finish releasing;
(5) before fracturing operation, the ball is placed in the connecting body to realize full well bore sealing;
(6) after the fracturing operation is completed, the liquid at the bottom of the well flows upwards to dissolve the pull rod 1, the guide cone 2, the slips 3, the connector 4 and the connecting body.
The soluble bridge plug for the rubber sleeve protection type fracturing can be further optimized or/and improved according to actual needs:
as shown in fig. 1, the end ring comprises an upper end ring 16, a middle end ring 17 and a lower end ring 18 which are sequentially sleeved on the outer side of the lower portion of the lower conical section 6 from top to bottom, the upper end ring 16, the middle end ring 17 and the lower end ring 18 are all C-shaped rings, and the projections of the opening of the upper end ring 16, the opening of the middle end ring 17 and the opening of the lower end ring 18 on the horizontal plane are uniformly distributed along the circumference. In the use process, the opening of the upper end ring 16, the opening of the middle end ring 17 and the opening of the lower end ring 18 are staggered in the direction, so that the lower end of the rubber cylinder 7 is protected by 360 degrees, and the rubber cylinder 7 is prevented from being damaged due to resistance in the middle of entering a well.
As shown in the attached figure 1, the inner side of the upper part of the slip 3 is provided with a lower frustum hole matched with the lower cone section 6, and the lower frustum hole is in a circular truncated cone shape with a large upper part and a small lower part. In the use process, when the slips 3 go upwards relative to the lower conical section 6 through the arrangement, the outer side of the lower conical section 6 is matched with the inner side of the slips 3, so that the upper part of the slips 3 is radially outwards expanded, and the slips 3 are better broken.
As shown in figure 1, the slip-type slip is also provided with slip teeth 11, and the slip teeth 11 are distributed on the outer side of the slip 3 along the circumference. The slip elements 11 are of a material known in the art, such as ceramic or carbide particles, as desired. In the using process, the slip teeth 11 are arranged on the outer side of the slip 3, so that after the slip 3 is broken, the slip teeth 11 are clamped into the inner wall of the sleeve to finish the seat hanging.
As shown in fig. 1, an upper straight hole section and an upper frustum hole 15 which are sequentially communicated from top to bottom are arranged in the upper mounting section 5, a lower straight hole section which is communicated from top to bottom is arranged in the lower frustum section 6, the upper frustum hole 15 is in a circular truncated cone shape with a large upper part and a small lower part, the inner diameter of the upper straight hole section is larger than the inner diameter of the upper end of the upper frustum hole 15, and the inner diameter of the lower end of the upper frustum hole 15 is equal to the inner diameter of the lower straight hole section; the lower end of the connector 4 is seated at the lower end of the upper straight hole section. In the use process, the inner diameter of the upper straight hole section is larger than the inner diameter of the upper end of the upper frustum hole 15, so that the connector 4 and the upper mounting section 5 can be conveniently mounted together; by arranging the upper frustum hole 15, the ball throwing and pressure building can be completed conveniently in the subsequent operation.
As shown in the attached figure 1, the pull rod further comprises a mounting assembly, the mounting assembly comprises an adapter 12 and a locking spring 13, the adapter 12 is fixedly mounted on the outer side of the upper end of the pull rod 1 through threaded connection, and the locking spring 13 is arranged between the inner side of the lower end of the adapter 12 and the outer side of the upper part of the pull rod 1; the outer side of the upper end of the adapter 12 is provided with external threads. In the use process, the pull rod 1 and a setting tool are conveniently installed together by arranging the conversion joint 12, and the loosening of the connection part is prevented by arranging the loosening spring.
As shown in the attached drawing 1, the pull rod comprises a fastening screw 14, a connector 4 is fixedly installed on the outer side of the middle of the pull rod 1 through threaded connection, and the fastening screw 14 capable of fixedly installing the connector 4 and the pull rod 1 together is arranged on the outer side of the connector 4. In the use process, the connecting head 4 and the pull rod 1 are conveniently fixed together through the arrangement, and the connection part is prevented from loosening.
The above technical features constitute the best embodiment of the invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. A soluble bridge plug for rubber sleeve protection type fracturing is characterized by comprising a pull rod, a guide cone, a slip, a connector, a connecting body, a rubber sleeve, an end ring, a starting shear pin and a releasing shear pin, wherein the guide cone is arranged on the outer side of the lower end of the pull rod, a limiting ring table is arranged on the outer side of the lower end of the guide cone, and a releasing shear pin capable of fixedly mounting the guide cone and the pull rod together is arranged on the outer side of the limiting ring table; the outer side of the upper part of the guide cone is provided with a slip with a lower end seat on the upper side of the limit ring table, and the inner side of the upper part of the slip can be radially expanded outwards when being subjected to outwards extrusion force; a connector is fixedly arranged on the outer side of the middle part of the pull rod, and a push cylinder with the upper part positioned above the pull rod is sleeved on the outer side of the upper part of the connector; the outer side of the lower part of the connector is provided with a connecting body sleeved on the outer side of the lower part of the pull rod, the connecting body comprises an upper mounting section and a lower conical section which are fixedly mounted together from top to bottom, the upper end of the upper mounting section and the lower end of the connector are fixedly mounted together through a starting shear pin, the lower conical section is in a circular truncated cone shape with a large upper part and a small lower part, the lower end of the lower conical section is positioned on the inner side of the upper part of the slip, the outer side of the lower part of the lower conical section corresponding to the position above the slip is sleeved with an; the pull rod, the guide cone, the slips, the end ring, the connector and the connecting body can be dissolved in a chlorine-containing solution.
2. The soluble bridge plug for rubber sleeve protection type fracturing of claim 1, wherein the end ring comprises an upper end ring, a middle end ring and a lower end ring which are sleeved on the lower outer side of the lower conical section from top to bottom in sequence, the upper end ring, the middle end ring and the lower end ring are all C-shaped rings, and the projections of the openings of the upper end ring, the openings of the middle end ring and the openings of the lower end ring on the horizontal plane are uniformly distributed along the circumference.
3. The soluble bridge plug for the rubber sleeve protection type fracturing according to claim 1 or 2, wherein the inner side of the upper part of the slip is provided with a lower cone hole matched with the lower cone section, and the lower cone hole is in a circular truncated cone shape with a large upper part and a small lower part.
4. The soluble bridge plug for the rubber sleeve protection type fracturing according to claim 1 or 2, characterized by further comprising slip teeth, wherein the slip teeth are distributed on the outer side of the slip along the circumference.
5. The soluble bridge plug for the rubber sleeve protection type fracturing, according to claim 3, is characterized by further comprising slip teeth, wherein the slip teeth are distributed on the outer side of the slip along the circumference.
6. The soluble bridge plug for rubber cylinder protection type fracturing as claimed in claim 1, 2 or 5, wherein the upper mounting section is internally provided with an upper straight hole section and an upper frustum hole which are sequentially communicated from top to bottom, the lower frustum section is internally provided with a lower straight hole section which is communicated up and down, the upper frustum hole is in a circular truncated cone shape with a large top and a small bottom, the inner diameter of the upper straight hole section is larger than the inner diameter of the upper end of the upper frustum hole, and the inner diameter of the lower end of the upper frustum hole is equal to the inner diameter of the lower straight hole section; the lower end of the connector is seated at the lower end of the upper straight hole section.
7. The soluble bridge plug for the rubber cylinder protection type fracturing of claim 3, wherein an upper straight hole section and an upper frustum hole which are sequentially communicated from top to bottom are arranged in the upper mounting section, a lower straight hole section which is communicated up and down is arranged in the lower frustum section, the upper frustum hole is in a circular truncated cone shape with a large upper part and a small lower part, the inner diameter of the upper straight hole section is larger than the inner diameter of the upper end of the upper frustum hole, and the inner diameter of the lower end of the upper frustum hole is equal to the inner diameter of the lower straight hole section; the lower end of the connector is seated at the lower end of the upper straight hole section.
8. The soluble bridge plug for the rubber cylinder protection type fracturing of claim 4, wherein the upper mounting section is internally provided with an upper straight hole section and an upper frustum hole which are sequentially communicated from top to bottom, the lower frustum section is internally provided with a lower straight hole section which is communicated up and down, the upper frustum hole is in a circular truncated cone shape with a large upper part and a small lower part, the inner diameter of the upper straight hole section is larger than the inner diameter of the upper end of the upper frustum hole, and the inner diameter of the lower end of the upper frustum hole is equal to the inner diameter of the lower straight hole section; the lower end of the connector is seated at the lower end of the upper straight hole section.
9. The soluble bridge plug for the rubber sleeve protective fracturing as claimed in claim 1, 2, 5, 7 or 8, further comprising a mounting assembly, wherein the mounting assembly comprises a crossover sub and a check spring, the crossover sub is fixedly mounted on the outer side of the upper end of the pull rod through threaded connection, and the check spring is arranged between the inner side of the lower end of the crossover sub and the outer side of the upper part of the pull rod; the outer side of the upper end of the adapter is provided with an external thread; and the outer side of the connector is provided with the fastening screw which can fixedly install the connector and the pull rod together.
10. The soluble bridge plug for the rubber sleeve protection type fracturing as claimed in claim 3, further comprising a mounting assembly, wherein the mounting assembly comprises an adapter and a check spring, the adapter is fixedly mounted on the outer side of the upper end of the pull rod through threaded connection, and the check spring is arranged between the inner side of the lower end of the adapter and the outer side of the upper part of the pull rod; the outer side of the upper end of the adapter is provided with an external thread; and the outer side of the connector is provided with the fastening screw which can fixedly install the connector and the pull rod together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605137.5A CN111648739A (en) | 2020-06-29 | 2020-06-29 | Rubber sleeve protection type soluble bridge plug for fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605137.5A CN111648739A (en) | 2020-06-29 | 2020-06-29 | Rubber sleeve protection type soluble bridge plug for fracturing |
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| Publication Number | Publication Date |
|---|---|
| CN111648739A true CN111648739A (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010605137.5A Pending CN111648739A (en) | 2020-06-29 | 2020-06-29 | Rubber sleeve protection type soluble bridge plug for fracturing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576231A (en) * | 2021-02-24 | 2021-03-30 | 四川省威沃敦化工有限公司 | All-metal soluble fracturing sectionalizer |
| CN114934758A (en) * | 2022-05-30 | 2022-08-23 | 中国石油化工股份有限公司 | Well-flushing temporary plugging tool for fracturing of low-permeability reservoir horizontal well |
| CN116122766A (en) * | 2021-11-15 | 2023-05-16 | 中国石油天然气集团有限公司 | Quick-release type soluble bridge plug |
| CN116733417A (en) * | 2023-08-16 | 2023-09-12 | 陕西海格瑞恩实业有限公司 | Anti-drop's soluble bridging plug |
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| CN204877376U (en) * | 2015-07-17 | 2015-12-16 | 中国石油集团西部钻探工程有限公司 | Bridging plug for fracturing |
| CN109236230A (en) * | 2018-11-28 | 2019-01-18 | 中国石油集团渤海钻探工程有限公司 | A kind of magnesium-base metal dissolvable bridge plug |
| CN208502731U (en) * | 2018-08-01 | 2019-02-15 | 四川省威沃敦化工有限公司 | A kind of solvable bridge plug of minor diameter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576231A (en) * | 2021-02-24 | 2021-03-30 | 四川省威沃敦化工有限公司 | All-metal soluble fracturing sectionalizer |
| CN116122766A (en) * | 2021-11-15 | 2023-05-16 | 中国石油天然气集团有限公司 | Quick-release type soluble bridge plug |
| CN116122766B (en) * | 2021-11-15 | 2024-04-23 | 中国石油天然气集团有限公司 | Quick-release type soluble bridge plug |
| CN114934758A (en) * | 2022-05-30 | 2022-08-23 | 中国石油化工股份有限公司 | Well-flushing temporary plugging tool for fracturing of low-permeability reservoir horizontal well |
| CN114934758B (en) * | 2022-05-30 | 2024-05-17 | 中国石油化工股份有限公司 | Flushing temporary plugging tool for fracturing low-permeability reservoir horizontal well |
| CN116733417A (en) * | 2023-08-16 | 2023-09-12 | 陕西海格瑞恩实业有限公司 | Anti-drop's soluble bridging plug |
| CN116733417B (en) * | 2023-08-16 | 2023-11-10 | 陕西海格瑞恩实业有限公司 | Anti-drop's soluble bridging plug |
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