CN212428714U - Full-sealing soluble bridge plug for well sealing - Google Patents
Full-sealing soluble bridge plug for well sealing Download PDFInfo
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- CN212428714U CN212428714U CN202021167091.5U CN202021167091U CN212428714U CN 212428714 U CN212428714 U CN 212428714U CN 202021167091 U CN202021167091 U CN 202021167091U CN 212428714 U CN212428714 U CN 212428714U
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Abstract
The utility model relates to a well sealing is with totally enclosed soluble bridging plug relates to oil engineering technical field. The utility model provides a totally seal soluble bridging plug mainly comprises center tube, barrel, bearing basket, elasticity end cap, pin and sealing washer, is applicable to the operation of changing the well head operation or because of special needs seal the operation of lower part fracturing segment in the horizontal segment. The full-sealed soluble bridge plug is set by adopting a conventional setting tool, after the wellhead device is replaced, the well is subjected to pressure building and puncture, the shale gas well can be rapidly put into production, the bridge plug can be automatically dissolved in the environment in the well in the later stage, the full drift diameter in the pipe column can be realized without drilling and removing operations, the problem of drilling and removing of the conventional composite bridge plug is solved, and the requirement of complex operation of a continuous oil pipe is avoided.
Description
Technical Field
The utility model relates to a petroleum engineering technical field, concretely relates to well sealing is with totally enclosed soluble bridging plug.
Background
After fracturing, the shale gas well in China needs to be changed the wellhead assembly in the gas testing process, namely the fracturing wellhead is changed into the gas testing wellhead. The method is characterized in that a bridge plug is arranged in a well to seal the underground high pressure when the wellhead is replaced on site, and although the soluble bridge plug is widely applied to the technical field of the staged fracturing operation of the well completion of the petroleum engineering, the existing soluble bridge plug can only seal the upper pressure of the bridge plug and cannot seal the underground high pressure, so that the soluble bridge plug cannot be applied to the operation link.
At present, the pressure in a well is usually sealed by using an easily drilled composite bridge plug on site, and after a well head is replaced by a gas team to be tested, the composite bridge plug needs to be drilled and removed by adopting a continuous oil pipe to communicate the gas production channel in the well, so that the well head and a stratum are communicated, the operation cost and the construction risk are increased, and the production time is delayed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a full-sealing soluble bridge plug for well sealing, which can realize bidirectional high bearing pressure by anchoring a cylinder body on the inner wall of an oil pipe, thereby meeting the high pressure requirement of well sealing; the special requirements that the upper part of the pin is sheared at low pressure and the lower part of the pin is blocked at high pressure without shearing are met through the elastic plug, and meanwhile, the elastic claw is designed to prevent the plug from returning and blocking a channel in the bridge plug; the design of the bearing basket prevents the elastic plug from falling to a position far away from the bridge plug. The utility model provides a great deal of technological effect that preferred technical scheme among a great deal of technical scheme can produce, see the explanation below for details.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a well sealing is with totally enclosed soluble bridge plug, its characterized in that: comprises a central tube, a cylinder body, a bearing basket and an elastic plug; wherein:
optionally or preferably, a boss is arranged at the upper end of the central tube, the upper end of the cylinder body is attached to the boss, the central tube is enabled to carry the cylinder body to move during setting, and the cylinder body can continue to move downwards due to inertia after the central tube is not stressed or mechanical energy is released.
Alternatively or preferably, the central tube is disposed within the barrel and is movably coupled to the barrel.
Optionally or preferably, the supporting basket is arranged at the lower end of the central tube and is fixedly connected with the central tube; the upper end of the bearing basket is attached to the lower end of the cylinder body.
Optionally or preferably, the lower end of the supporting basket is provided with a plurality of holes and a plurality of grooves for overflowing and supporting the elastic plugs.
Optionally or preferably, the inner hole of the central tube is provided with a step, and the elastic plug is arranged at the step of the inner hole of the central tube, when high pressure is applied to the lower part of the plugging well, the elastic plug is not pressed to move upwards to cut the pin, and when the upper pressure is applied to the elastic plug, the pin can be cut at a certain pressure value, so that the elastic plug is knocked down into the bearing basket.
Optionally or preferably, the cylinder comprises a compression ring, an upper slip, an upper cone, a rubber cylinder, a lower cone and a lower slip; the clamping ring is arranged at the upper end of the cylinder body and is attached to a boss at the upper end of the central tube.
Optionally or preferably, the upper slip and the lower slip are both provided with a conical gap and respectively attached to the conical surfaces of the upper cone and the lower cone; the side surface of the upper clamping ring is attached to the side surface of the pressing ring.
Optionally or preferably, the rubber cylinder is arranged between the upper cone and the lower cone, and two side faces of the rubber cylinder are respectively attached to the upper cone and the lower cone.
Alternatively or preferably, the side surfaces of the lower slips abut the upper end of the support basket, and when the upper end is subjected to pressure, all the abutting surfaces slide relative to each other in the vertical direction.
Optionally or preferably, the lower end of the central tube is provided with threads, and the upper end of the supporting basket is connected with the lower end of the central tube through the threads.
Optionally or preferably, the sealing device further comprises a sealing ring, wherein the upper end of the elastic plug is of an elastic claw structure and is attached to the step of the inner hole of the central tube.
Optionally or preferably, the lower end of the elastic plug is provided with a plurality of grooves for installing sealing rings, so that the sealing performance of the two ends of the device is ensured.
Optionally or preferably, the lower end of the elastic plug is fixedly connected with the lower end of the central tube through a pin.
Based on the technical scheme, the following technical effects can be generated:
the embodiment of the utility model provides a pair of seal soluble bridge plug entirely for well shut-in is applicable to and changes the well head operation or because of special needs seal the operation of lower part fracturing section at the horizontal segment. The full-sealing soluble bridge plug for well sealing of the utility model is anchored on the inner wall of the sleeve through the cylinder body, thus realizing bidirectional high bearing and meeting the high-pressure requirement of sealing in the well; the special requirements that the upper part of the pin is sheared at low pressure and the lower part of the pin is blocked at high pressure without shearing are met through the elastic plug, and meanwhile, the elastic claw is designed to prevent the plug from returning and blocking a channel in the bridge plug; the design of the supporting basket prevents the elastic plug from falling to a position far away from the bridge plug; all parts are completely soluble, the later-stage construction operation is facilitated, the problem of drilling and removing of a conventional composite bridge plug is solved, the requirement of complex operation of the continuous oil pipe is avoided, and the operation cost and time are saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a fully-sealed soluble bridge plug for well sealing;
FIG. 2 is a schematic diagram of a fully-sealed soluble bridge plug for well sealing in a well string;
FIG. 3 is a schematic view of a fully-sealed soluble bridge plug for well sealing in a setting state in a casing;
FIG. 4 is a schematic diagram of a well-plugging after breakdown of a fully-plugged soluble bridge plug;
in the figure: 1-a central tube; 2-pressing a ring; 3, clamping slips are put on; 4-upper cone; 5-a rubber cylinder; 6-lower cone; 7-lower slips; 8-a support basket; 9-elastic plug; 10-a pin; 11-a sealing ring; 12-a wellhead assembly; 13-a wellbore; 14-full seal soluble bridge plug; 15-fracturing interval section; 16-sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.
As shown in fig. 1-4:
the utility model provides a well sealing is with totally enclosed soluble bridge plug, its characterized in that: comprises a central tube 1, a cylinder body, a bearing basket 8 and an elastic plug 9; wherein:
the upper end of the central tube 1 is provided with a boss, and the upper end of the tube body is attached to the boss, so that the central tube 1 is driven to move during setting, and the tube body can continuously move downwards due to inertia after the central tube 1 is not stressed or mechanical energy is released; the central tube 1 is arranged in the cylinder body and is movably connected with the cylinder body; the supporting basket 8 is arranged at the lower end of the central tube 1 and is fixedly connected with the central tube 1; the upper end of the supporting basket 8 is attached to the lower end of the cylinder body; the lower end of the supporting basket 8 is provided with a plurality of holes and a plurality of grooves for overflowing and supporting the elastic plugs 9; the inner hole of the central tube 1 is provided with steps, the elastic plug 9 is arranged at the steps of the inner hole of the central tube 1, when high pressure is applied to the lower part in the plugging well, the elastic plug 9 cannot be pressed to move upwards to cut the pin 10, and when the upper pressure acts on the elastic plug 9, the pin 10 can be cut at a certain pressure value, so that the elastic plug 9 is knocked down into the bearing basket 8.
As an alternative embodiment, the cylinder comprises a compression ring 2, an upper slip 3, an upper cone 4, a rubber cylinder 5, a lower cone 6 and a lower slip 7; the clamping ring 2 is arranged at the upper end of the cylinder and is attached to a boss at the upper end of the central tube 1.
In an alternative embodiment, the upper slip 3 and the lower slip 7 are both provided with conical notches and respectively abut against the conical surfaces of the upper cone 4 and the lower cone 6.
As an optional implementation mode, the side surface of the upper clamping ring is attached to the side surface of the pressing ring 2; the rubber cylinder 5 is arranged between the upper cone 4 and the lower cone 6, and two side faces of the rubber cylinder 5 are respectively attached to the upper cone 4 and the lower cone 6.
Alternatively, the side of the lower slip 7 abuts the upper end of the support basket 8, and when the upper end is under pressure, all the abutting surfaces slide relative to each other in the vertical direction.
In an alternative embodiment, the lower end of the central tube 1 is provided with threads, and the upper end of the supporting basket 8 is connected with the lower end of the central tube 1 through the threads.
As an optional embodiment, the device further comprises a sealing ring 11, wherein the upper end of the elastic plug 9 is in an elastic claw structure and is attached to the step of the inner hole of the central tube 1.
As an optional implementation manner, the lower end of the elastic plug 9 is provided with a plurality of grooves for installing the sealing rings 11, so that the sealing performance of the two ends of the device is ensured; the lower end of the elastic plug 9 is fixedly connected with the lower end of the central tube 1 through a pin 10.
As an optional embodiment, the other side of the boss is provided with an adjusting sleeve 5, and the adjusting sleeve 5 is arranged between the cylinder 3 and the fixed seat sleeve 4; the adjusting sleeve 5 is connected with the cylinder 3 and the fixed seat sleeve 4 in a sliding way.
The embodiment of the utility model provides an in, a well-plugging is with totally enclosed soluble bridge plug working process as follows: when the wellhead device 12 needs to be replaced or a fractured section at the lower part of the horizontal section needs to be closed due to working conditions, the fully-sealed soluble bridge plug 14 is connected with a conventional setting tool, then the fully-sealed soluble bridge plug is lowered to a specified position in the shaft 13 through a cable, and the setting tool ignites and sets or presses the set bridge plug; when the fully-sealed soluble bridge plug 14 is set, the setting tool pushes the compression ring 2 to further extrude the upper slip 3, the upper cone 4, the rubber cylinder 5, the lower cone 6 and the lower slip 7, after setting, the upper slip 3 and the lower slip 7 are propped and clamped on the inner wall of the casing 16 to realize bidirectional anchoring, and meanwhile, the rubber cylinder 5 assembly is compressed and tightly attached to the inner wall of the casing 16 to realize setting; after the fully-sealed soluble bridge plug 14 is set, plugging of a fracturing interval 15 in the well is realized, a setting tool is recovered, and the wellhead device 12 can be replaced; after the operation of replacing the wellhead device 12 is finished, the pressure inside the casing of the wellhead device 12 is suppressed, and the pressure acts on the elastic plug 9; when the pressure reaches a certain value, the elastic plug 9 shears the pin 10 and then falls into the bearing basket 8, the well and the stratum are communicated, meanwhile, the elastic claw at the upper end of the elastic plug 9 is opened, the outer diameter size is larger than the inner diameter size of the central tube 1, and the elastic plug 9 can be prevented from returning under the action of the pressure and the fluid in the well to block the inner drift diameter of the full-closed bridge plug.
Claims (4)
1. A kind of well-sealing uses the totally-enclosed soluble bridge plug, characterized by that: comprises a central tube (1), a cylinder body, a bearing basket (8) and an elastic plug (9); wherein:
the central tube (1) is arranged in the cylinder body and movably connected with the cylinder body, a boss is arranged at the upper end of the central tube (1), and the upper end of the cylinder body is attached to the boss; the bearing basket (8) is arranged at the lower end of the central pipe (1) and is fixedly connected with the central pipe (1); the upper end of the supporting basket (8) is attached to the lower end of the cylinder body; the inner hole of the central tube (1) is provided with steps, and the elastic plug (9) is arranged at the steps of the inner hole of the central tube (1).
2. The fully-sealed soluble bridge plug for well sealing according to claim 1, wherein: the cylinder comprises a compression ring (2), an upper slip (3), an upper cone (4), a rubber cylinder (5), a lower cone (6) and a lower slip (7); the compression ring (2) is arranged at the upper end of the cylinder body and is attached to a boss at the upper end of the central pipe (1); conical notches are formed in the upper slip (3) and the lower slip (7) and are respectively attached to the conical surfaces of the upper cone (4) and the lower cone (6); the side surface of the upper slip (3) is attached to the side surface of the compression ring (2); the rubber cylinder (5) is arranged between the upper cone (4) and the lower cone (6), and two side surfaces of the rubber cylinder (5) are respectively attached to the upper cone (4) and the lower cone (6); the side surface of the lower slip (7) is attached to the upper end of the bearing basket (8).
3. The fully-sealed soluble bridge plug for well sealing according to claim 1, wherein: the lower end of the central tube (1) is provided with threads, and the upper end of the bearing basket (8) is connected with the lower end of the central tube (1) through the threads; the lower end of the supporting basket (8) is provided with a plurality of holes and a plurality of grooves.
4. The fully-sealed soluble bridge plug for well sealing according to claim 1, wherein: the upper end of the elastic plug (9) is of an elastic claw structure and is attached to the step of the inner hole of the central tube (1); the lower end of the elastic plug (9) is provided with a plurality of grooves for mounting the sealing rings (11); the lower end of the elastic plug (9) is fixedly connected with the lower end of the central tube (1) through a pin (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021167091.5U CN212428714U (en) | 2020-06-22 | 2020-06-22 | Full-sealing soluble bridge plug for well sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021167091.5U CN212428714U (en) | 2020-06-22 | 2020-06-22 | Full-sealing soluble bridge plug for well sealing |
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| Publication Number | Publication Date |
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| CN212428714U true CN212428714U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021167091.5U Active CN212428714U (en) | 2020-06-22 | 2020-06-22 | Full-sealing soluble bridge plug for well sealing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737941A (en) * | 2022-05-27 | 2022-07-12 | 中国石油化工股份有限公司 | Staged fracturing construction method for long well section |
-
2020
- 2020-06-22 CN CN202021167091.5U patent/CN212428714U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737941A (en) * | 2022-05-27 | 2022-07-12 | 中国石油化工股份有限公司 | Staged fracturing construction method for long well section |
| CN114737941B (en) * | 2022-05-27 | 2024-05-17 | 中国石油化工股份有限公司 | Staged fracturing construction method for long well section |
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