CN213144434U - Full-sealing soluble bridge plug for well sealing - Google Patents
Full-sealing soluble bridge plug for well sealing Download PDFInfo
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- CN213144434U CN213144434U CN202022204106.7U CN202022204106U CN213144434U CN 213144434 U CN213144434 U CN 213144434U CN 202022204106 U CN202022204106 U CN 202022204106U CN 213144434 U CN213144434 U CN 213144434U
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- sealing
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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 bridge plug mainly comprises center tube, barrel, rupture disc, lower clutch, 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 section at the horizontal segment. The design of the basin-shaped structure with the outward convex and the inward concave rupture discs can meet the special requirements that the convex surfaces bear high pressure in the well and the concave surfaces are punctured by low pressure, thereby being beneficial to field construction operation; the full-sealed soluble bridge plug is sealed by a conventional setting tool, after the wellhead device is replaced, the pressure build-up in the well breaks a rupture disc in the full-sealed soluble bridge plug, the shale gas well can be put into production quickly, the bridge plug can be dissolved automatically in the later stage in the well, the full drift diameter in a pipe column can be realized without drilling operation, the problem of drilling operation 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 structural design of the rupture disc ensures that the pressure bearing capacity of the convex surface is far greater than that of the concave surface; the special requirements that the convex surface bears high pressure in the well and the concave surface is punctured by low pressure can be met, and the on-site construction operation is facilitated. 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 rupture disc and a lower joint; wherein:
the central tube is arranged in the cylinder body and connected with the cylinder body, a boss is arranged at the upper end of the central tube, and the upper end of the cylinder body is attached to the boss; the lower joint is arranged at the lower end of the central tube, a fixing ring is arranged in the lower joint, threads are arranged in the fixing ring, and the lower joint is fixedly connected with the central tube through the fixing ring; the inner hole of the central tube is provided with a step, and the rupture disc is fixed at the step of the inner hole of the central tube; a sealing ring is arranged between the rupture disc and the central pipe; the rupture disc is of a basin-shaped structure with an outer convex part and an inner concave part, one end of the rupture disc, which is concave outwards, is arranged inside the lower connector, the rupture disc is made of a fragile material, and large-volume falling objects cannot be generated in the well after the rupture disc is broken into fragments, so that the production of the oil-gas well is not influenced; the convex surface of the rupture disc can uniformly disperse the pressure to the periphery and can bear the high pressure in the well; the concave surface of the rupture disc concentrates the pressure in the center and is susceptible to rupture when subjected to greater pressure.
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 compression ring is arranged at the upper end of the cylinder body and is attached to the boss at the upper end of the central tube; conical notches are formed in the upper slip and the lower slip and are respectively attached to the conical surfaces of the upper cone and the lower cone; the side surface of the upper slip is attached to the side surface of the compression ring; the rubber cylinder is arranged between the upper cone and the lower cone, and two side surfaces of the rubber cylinder are respectively attached to the upper cone and the lower cone; the side surface of the lower slip is attached to the upper end of the lower joint.
Optionally or preferably, the upper slip and the lower slip are both provided with a pin hole, and the upper slip and the lower slip are fixedly connected with the central pipe by a pin penetrating through the pin hole.
Optionally or preferably, the compression ring, the upper slip, the upper cone, the lower slip, the central tube and the lower joint are all made of soluble metal materials; the rubber cylinder is made of soluble rubber material; the metal material and the rubber material can be dissolved in liquid such as clear water, fracturing fluid, formation water, completion fluid and the like in the well.
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 oil pipe through the cylinder body, thus realizing bidirectional high bearing and meeting the high-pressure requirement of sealing in the well; the structural design of the rupture disc ensures that the pressure bearing capacity of the convex surface is far greater than that of the concave surface; the special requirements that the convex surface bears high pressure in the well and the concave surface is punctured by low pressure can be met, and the on-site construction operation is facilitated; the full-sealing soluble bridge plug device effectively solves the drilling and removing problem of the conventional composite bridge plug, and avoids the requirement of complex operation of a continuous oil pipe.
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;
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-sealing ring; 9-a rupture disc; 10-a fixed ring; 11-lower joint.
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:
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 rupture disc 9 and a lower joint 11; the central tube 1 is arranged in the cylinder and connected with the cylinder, a boss is arranged at the upper end of the central tube 1, and the upper end of the cylinder is attached to the boss; the lower joint 11 is arranged at the lower end of the central tube 1, a fixing ring 10 is arranged inside the lower joint 11, threads are arranged in the fixing ring 10, and the lower joint 11 is fixedly connected with the central tube 1 through the fixing ring 10; the inner hole of the central tube 1 is provided with a step, and the rupture disc 9 is fixed at the step of the inner hole of the central tube 1; a sealing ring 8 is arranged between the rupture disc 9 and the central tube 1; the rupture disc 9 is of a convex-concave basin-shaped structure, one concave end of the rupture disc 9 is arranged in the lower joint 11, the rupture disc 9 is made of a fragile material, large-volume falling objects cannot be generated in the well after the rupture disc is broken into fragments, and production of the oil-gas well is not influenced; the convex surface of the rupture disc 9 can uniformly disperse the pressure to the periphery and can bear the high pressure in the well; the concave surface of rupture disc 9 will concentrate the pressure in the center and will rupture easily when subjected to greater pressure.
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 compression 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; 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 cylinder body is arranged between the upper cone 4 and the lower cone 6, and two side surfaces of the cylinder body 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 lower joint 11.
As an optional embodiment, the upper slip 3 and the lower slip 7 are both provided with a pin hole, and the upper slip 3 and the lower slip 7 are fixedly connected with the central pipe 1 through a pin penetrating through the pin hole.
As an alternative embodiment, the compression ring 2, the upper slip 3, the upper cone 4, the lower cone 6, the lower slip 7, the central tube 1 and the lower joint 11 are all made of soluble metal materials; the rubber cylinder 5 is made of soluble rubber material; the metal material and the rubber material can be dissolved in liquid such as clear water, fracturing fluid, formation water, completion fluid and the like in the well.
The embodiment of the utility model provides an in, a well-plugging is with totally enclosed soluble bridge plug working process as follows: when a wellhead device needs to be replaced or a fractured section at the lower part of the horizontal section is closed due to special needs, the fully-sealed soluble bridge plug is connected with a setting tool, then the fully-sealed soluble bridge plug is lowered to a specified position in a shaft through a cable, and the setting tool ignites and sets or presses the set bridge plug. When the fully-sealed soluble bridge plug is set, the setting tool pushes the compression ring 2, the compression ring 2 extrudes the upper slip 3, the upper cone 4, the rubber cylinder 5, the lower cone 6 and the lower slip 7, after the setting, the upper slip 3 and the lower slip 7 are propped and clamped on the inner wall of the sleeve to realize bidirectional anchoring, and meanwhile, the rubber cylinder 5 is compressed and tightly attached to the inner wall of the sleeve to realize sealing; after the fully-sealed soluble bridge plug is set, the high pressure in the well is blocked, and the convex surface of the rupture disc 9 bears the high pressure in the well; after the operation of the well head replacing device is finished, the pressure in the well head pipe is suppressed, the pressure acts on the concave surface of the rupture disc 9, when the pressure reaches a certain value, the rupture disc 9 is broken, the well is communicated with the stratum, and the shale gas well is put into production quickly.
Claims (3)
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 rupture disc (9) and a lower joint (11); wherein:
the central tube (1) is arranged in the cylinder body and 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 lower joint (11) is arranged at the lower end of the central pipe (1), a fixing ring (10) is arranged inside the lower joint (11), threads are arranged in the fixing ring (10), and the lower joint (11) is fixedly connected with the central pipe (1) through the fixing ring (10); the inner hole of the central tube (1) is provided with a step, and the rupture disc (9) is fixed at the step of the inner hole of the central tube (1); a sealing ring (8) is arranged between the rupture disc (9) and the central pipe (1); the rupture disc (9) is of a basin-shaped structure protruding outwards and sinking inwards, and the outer concave end of the rupture disc (9) is arranged in the lower joint (11).
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 lower joint (11).
3. The fully-sealed soluble bridge plug for well sealing according to claim 2, wherein: go up slips (3) and all be equipped with the round pin hole on slips (7) down, go up slips (3) and pass round pin hole and center tube (1) fixed connection through the pin with slips (7) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022204106.7U CN213144434U (en) | 2020-09-30 | 2020-09-30 | Full-sealing soluble bridge plug for well sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022204106.7U CN213144434U (en) | 2020-09-30 | 2020-09-30 | Full-sealing soluble bridge plug for well sealing |
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| Publication Number | Publication Date |
|---|---|
| CN213144434U true CN213144434U (en) | 2021-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022204106.7U Active CN213144434U (en) | 2020-09-30 | 2020-09-30 | Full-sealing soluble bridge plug for well sealing |
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| CN (1) | CN213144434U (en) |
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
- 2020-09-30 CN CN202022204106.7U patent/CN213144434U/en active Active
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 |
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