CN213807599U - Single slip type soluble bridge plug - Google Patents
Single slip type soluble bridge plug Download PDFInfo
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- CN213807599U CN213807599U CN202023109091.2U CN202023109091U CN213807599U CN 213807599 U CN213807599 U CN 213807599U CN 202023109091 U CN202023109091 U CN 202023109091U CN 213807599 U CN213807599 U CN 213807599U
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Abstract
A single slip type soluble bridge plug comprises a central tube with a ball seat, a seat sleeve, a lower joint, a combined rubber cylinder, a lower cone and a lower slip, wherein the lower joint is arranged at one end of the outer surface of the central tube; the soluble component is used for forming the single-slip bridge plug, so that the construction position can be well plugged, and the bridge plug can be automatically dissolved and unplugged after the operation is finished, so that the working procedures are reduced, and the construction cost and resources are saved. The table-shaped rubber sleeve and the lower cone are used for supporting the lower slip, so that the table-shaped rubber sleeve enters between the lower slip and the central tube, and the lower slip is tightly extruded to the surrounding sleeve.
Description
Technical Field
The utility model relates to an oil and gas exploitation equipment technical field, concretely relates to soluble bridging plug of single slips formula.
Background
The seal technology is widely applied to various underground oil testing sand prevention and water injection fracturing and is one of basic operations in oil and gas exploitation engineering; the most common means in the current sealing operation is to adopt a bridge plug to accurately seal a shaft casing, so as to obtain a required operation position, and the method has the characteristics of less working procedures, short period and good sealing effect, and is widely applied in the world.
In the traditional bridge plug construction, the position of a casing to be plugged is mechanically plugged by cast iron capable of drilling and plugging, and the traditional bridge plug construction method is characterized in that the plugging material has high mechanical performance and strength, but the plugging process is almost irreversible, a fracturing ball cannot be flowback, a drilling tool needs to be used for drilling and plugging removal when plugging removal is carried out, the construction process is complex, and the consumed cost and resources are high. To this, newly developed some soluble novel bridge plugs in the market and be used for replacing traditional bridge plug, such soluble bridge plug can dissolve automatically in the liquid condition in the pit, has avoided follow-up adoption drill bit to carry out mechanical unblock, but soluble bridge plug because its material chooses for use and structural design's reason, but often has the shutoff effect poor, the pressure-bearing scope is little, anchoring position is unstable scheduling problem, leads to the failure of fracturing operation easily.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a soluble bridge plug of single slips formula to solve the difficult problem of unblock behind the mechanical shutoff of traditional bridge plug, ensure the shutoff effect of soluble bridge plug simultaneously, guarantee going on smoothly like the operation such as fracturing after the shutoff.
The utility model provides a technical scheme is, provide a single slips formula soluble bridge plug, including center tube, seat cover, lower clutch, combination packing element, lower cone and the slips down that have the ball seat, the lower clutch sets up in center tube surface one end, the cover is equipped with seat cover, combination packing element, lower cone and slips down in proper order from the ball seat to between the lower clutch on the center tube surface, be provided with the shearing pin between seat cover and the center tube, the lower cone is located the clearance between center tube and the slips down, still be equipped with the support sheet, the bench-shaped packing element and the spacer that cover establish on the center tube surface in proper order between combination packing element and the lower cone bottom surface; the outer surface of the lower slip is respectively sleeved with a slip rubber pad and slip teeth.
Furthermore, the supporting sheet, the table-shaped rubber sleeve and the separating sheet are all in a circular table shape with an inclined outer part.
Furthermore, the outer oblique edges of the supporting sheet, the table-shaped rubber sleeve and the separating sheet are collinear with the oblique edge of the lower cone.
Further, the maximum distance between the top of the lower cone and the lower slip in the initial state is larger than the minimum distance of the projection of the table-shaped rubber sleeve and the projection of the lower slip on the axis of the central pipe respectively.
Furthermore, the annular sleeve on the outer surface of the central tube is provided with a non-return tooth which is inclined towards the direction of the lower joint from the ball seat, and the seat sealing sleeve is provided with a meshing tooth which can be matched with the non-return tooth on the central tube.
Furthermore, the central tube, the seat sleeve, the lower joint, the support sheet, the separation sheet, the lower cone and the lower slip are all made of soluble metal.
Furthermore, the combined rubber cylinder, the table-shaped rubber sleeve and the slip rubber pad are all made of soluble rubber.
Furthermore, the slip teeth are made of stainless steel.
The utility model discloses the technical effect who plays is:
1. the soluble component is used for forming the single-slip bridge plug, the construction position can be well plugged, the bridge plug can be automatically dissolved and unplugged after the operation is completed, the process is reduced compared with the traditional drilling unplugging, and the construction cost and resources are saved.
2. The table-shaped rubber sleeve and the lower cone are used for supporting the lower slip, so that the table-shaped rubber sleeve can enter between the lower slip and the central pipe, and after the table-shaped rubber sleeve is extruded, the lower slip is radially extruded, and the lower slip is tightly extruded to the surrounding sleeve.
3. The structure that the shutoff effect to the bridging plug played a role includes combination packing element and slips cushion and the slips tooth on the slips down, and the structure quantity that can play the shutoff effect is sufficient, has improved the shutoff effect effectively.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
in the figure, 1 a central tube, 2 a seat sealing sleeve, 3 a lower joint, 4 a combined rubber cylinder, 5 a supporting sheet, 6 a separating sheet, 7 table-shaped rubber sleeves, 8 a lower cone, 9 a lower slip, 10 a slip rubber pad, 11 slip teeth, 12 a shearing pin and 13 a non-return tooth.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Example (b):
referring to fig. 1, a single slip soluble bridge plug:
the lower joint 3 is arranged at one end of the outer surface of the central tube 1, a seat sleeve 2, a combined rubber sleeve 4, a lower cone 8 and a lower slip 9 are sequentially sleeved on the outer surface of the central tube 1 from a ball seat to the lower joint 3, a shear pin 12 is arranged between the seat sleeve 2 and the central tube 1, a support sheet 5, a table-shaped rubber sleeve 7 and a separation sheet 6 which are sleeved on the outer surface of the central tube 1 are further sequentially arranged between the combined rubber sleeve 4 and the bottom surface of the lower cone 8, and a slip rubber pad 10 and a slip 11 are respectively sleeved on the outer surface of the lower slip 9; the supporting sheet 5, the table-shaped rubber sleeve 7 and the separating sheet 6 are all in the shape of a circular table with the inclined outer part; the outer oblique edges of the supporting sheet 5, the table-shaped rubber sleeve 7 and the separating sheet 6 are collinear with the oblique edge of the lower cone 8; the maximum distance between the top of the lower cone 8 and the lower slip 9 in the initial state is larger than the minimum distance of the projection of the table-shaped rubber sleeve 7 and the projection of the lower slip 9 on the axis of the central tube 1 respectively; the outer surface of the central tube 1 is annularly sleeved with a non-return tooth 13 which is inclined towards the lower joint 3 by a ball seat, and the seat sleeve 2 is provided with a meshing tooth which can be matched with the non-return tooth 13 on the central tube 1; the central tube 1, the seat sleeve 2, the lower joint 3, the supporting sheet 5, the separating sheet 6, the lower cone 8 and the lower slip 9 are all made of soluble metal; the combined rubber cylinder 4, the table-shaped rubber sleeve 7 and the slip rubber pad 10 are all made of soluble rubber; the slip teeth 11 are constructed of stainless steel.
The utility model discloses a theory of operation is:
a single slip type soluble bridge plug is disclosed, wherein a lower joint 3 is arranged at one end of the outer surface of a central tube 1, a seat sleeve 2, a combined rubber cylinder 4, a lower cone 8 and a lower slip 9 are sequentially sleeved on the outer surface of the central tube 1 from a ball seat to the lower joint 3, a shear pin 12 is arranged between the seat sleeve 2 and the central tube 1, a supporting sheet 5, a table-shaped rubber sleeve 7 and a separating sheet 6 which are sleeved on the outer surface of the central tube 1 are further sequentially arranged between the combined rubber cylinder 4 and the bottom surface of the lower cone 8, the lower cone 8 is positioned in a gap between the central tube 1 and the lower slip 9, a slip rubber pad 10 and a slip tooth 11 are respectively sleeved on the outer surface of the lower slip 9, the seat sleeve 2 is used for stably bearing external force, the seat sleeve is fixed on the central tube 1 by the shear pin 12 when the seat sleeve is not stressed, the shear pin 12 is broken, the seat sleeve 2 moves to the bottom of the central tube 1 along the central tube 1 when being extruded by external force, thereby extruding the combined rubber cylinder 4 to move in the same direction, and then the combined rubber cylinder 4 sequentially pushes the support sheet 5, the table-shaped rubber sleeve 7, the separation sheet 6 and the lower cone 8 to move towards the depth of a gap in the gap between the central tube 1 and the lower slip 9, the lower slip 9 is extruded to be protruded radially, a slip rubber pad 10 and slip teeth 11 on the lower slip 9 are made to be in contact with the wall of the sleeve, the lower slip 9 is made to reversely support the combined rubber cylinder 4, the support sheet 5, the table-shaped rubber sleeve 7, the separation sheet 6 and the lower cone 8 while the sleeve is blocked, and the combined rubber cylinder 4 is continuously stressed and extruded to be protruded to be in contact with the wall of the sleeve to form the blocking.
The support sheet 5, the table-shaped rubber sleeve 7 and the separation sheet 6 are all externally inclined circular table shapes, and the three are mutually attached to form a group of circular table structures sleeved on the central tube 1.
The outer oblique edges of the supporting sheet 5, the table-shaped rubber sleeve 7 and the separating sheet 6 are collinear with the oblique edge of the lower cone 8, namely the oblique edge of the circular truncated cone structure formed by the supporting sheet 5, the table-shaped rubber sleeve 7 and the separating sheet 6 is collinear with the oblique edge of the lower cone 8, so that the circular truncated cone structure and the lower cone 8 can form a group of larger cone structures.
The maximum distance between the top of the lower cone 8 and the lower slip 9 in the initial state is larger than the minimum distance of the projection of the table-shaped rubber sleeve 7 and the lower slip 9 on the axis of the central tube 1, so that the allowance of horizontal movement is still left between the lower cone 8 and the lower slip 9 when the bevel edge of the table-shaped rubber sleeve 7 is in initial contact with the bevel edge of the lower slip 9, and therefore when the lower cone 8 stops moving due to the fact that the lower slip 9 is supported by the sleeve wall, the table-shaped rubber sleeve 7 can be located in the gap between the lower slip 9 and the central tube 1, at the moment, the supporting sheet 5 and the slip sheet 6 which are made of metal extrude the two sides of the table-shaped rubber sleeve 7, the bevel edge of the table-shaped rubber sleeve 7 radially protrudes outwards in the gap between the lower slip 9 and the central tube 1, the lower slip 9 is further extruded to the sleeve wall, the sealing performance of the lower slip 9 is effectively improved, and finally, the bridge plug of the single slip structure is plugged in the combined rubber sleeve 4, The table-shaped rubber sleeve 7, the lower slip 9, the slip rubber pad 10 and the slip teeth 11 form a stable and effective casing pipe plugging structure under the combined action.
The annular cover is equipped with by the ball seat point down the non return tooth 13 of 3 direction inclinations of joint on the surface of center tube 1, be equipped with on the seat cover 2 can with the non return tooth 13 matched with meshing tooth on the center tube 1, seat cover 2 receives external force when moving along center tube 1 towards lower clutch 3, its self meshing tooth will mesh gradually with the non return tooth 13 on the surface of center tube 1, make when seat cover 2 is impeld to the maximum displacement position, can keep the rigidity because of the effect of non return tooth 13, so on continuously for combination packing element 4, trapezoidal packing element 7 and lower slips 9 provide pressure, guarantee the shutoff effect that lasts of bridging plug.
The central tube 1, the sitting sleeve 2, the lower joint 3, the supporting sheet 5, the separating sheet 6, the lower cone 8 and the lower slip 9 are all made of soluble metal and are gradually dissolved under the soaking of electrolyte solution, so that the blockage can be smoothly removed without using a drilling tool.
The combined rubber cylinder 4, the table-shaped rubber sleeve 7 and the slip rubber pad 10 are all made of soluble rubber, so that the soluble rubber can be dissolved and unplugged automatically.
The slip teeth 11 are made of stainless steel, so that the strength of the slip teeth 11 is guaranteed, and meanwhile, after other parts of the soluble bridge plug are dissolved, the stainless steel slip teeth 11 can be drained back to a wellhead along with drilling fluid due to small volume and weight, and blockage cannot be caused.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are all covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A single slip type soluble bridge plug comprises a central tube (1) with a ball seat, a seat sleeve (2), a lower joint (3), a combined rubber cylinder (4), a lower cone (8) and a lower slip (9), wherein the lower joint (3) is arranged at one end of the outer surface of the central tube (1), the seat sleeve (2), the combined rubber cylinder (4), the lower cone (8) and the lower slip (9) are sequentially sleeved on the outer surface of the central tube (1) from the ball seat to the lower joint (3), a shear pin (12) is arranged between the seat sleeve (2) and the central tube (1), the lower cone (8) is positioned in a gap between the central tube (1) and the lower slip (9), the device is characterized in that a support sheet (5), a table-shaped rubber sleeve (7) and a separation sheet (6) which are sleeved on the outer surface of the central tube (1) are sequentially arranged between the combined rubber cylinder (4) and the bottom surface of the lower cone (8);
the outer surface of the lower slip (9) is respectively sleeved with a slip rubber pad (10) and slip teeth (11).
2. A single slip soluble bridge plug according to claim 1 wherein: the supporting sheet (5), the table-shaped rubber sleeve (7) and the separating sheet (6) are all in the shape of a circular table with the inclined outer part.
3. A single slip soluble bridge plug according to claim 2 wherein: the outer oblique edges of the supporting sheet (5), the table-shaped rubber sleeve (7) and the separating sheet (6) are collinear with the oblique edge of the lower cone (8).
4. A single slip soluble bridge plug according to claim 3 wherein: and the maximum distance between the top of the lower cone (8) and the lower slip (9) in the initial state is greater than the minimum distance of the projections of the table-shaped rubber sleeve (7) and the lower slip (9) on the axis of the central tube (1).
5. A single slip soluble bridge plug according to claim 4 wherein: the annular sleeve is equipped with by the ball seat point on the surface of center tube (1) to connect the non return tooth (13) of (3) direction slope, be equipped with on seat cover (2) can with the meshing tooth of non return tooth (13) matched with on center tube (1).
6. A single slip soluble bridge plug according to claim 5 wherein: the central tube (1), the seat sleeve (2), the lower joint (3), the support sheet (5), the separation sheet (6), the lower cone (8) and the lower slip (9) are all made of soluble metal.
7. A single slip soluble bridge plug according to claim 6 wherein: the combined rubber cylinder (4), the table-shaped rubber sleeve (7) and the slip rubber pad (10) are all made of soluble rubber.
8. A single slip soluble bridge plug according to claim 7 wherein: the slip teeth (11) are made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023109091.2U CN213807599U (en) | 2020-12-22 | 2020-12-22 | Single slip type soluble bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023109091.2U CN213807599U (en) | 2020-12-22 | 2020-12-22 | Single slip type soluble bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213807599U true CN213807599U (en) | 2021-07-27 |
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ID=76947368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023109091.2U Active CN213807599U (en) | 2020-12-22 | 2020-12-22 | Single slip type soluble bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213807599U (en) |
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2020
- 2020-12-22 CN CN202023109091.2U patent/CN213807599U/en active Active
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220112 Address after: 610000 floor 1, unit 1, building 1, No. 108, Tianxiang street, Chenghua District, Chengdu, Sichuan Patentee after: Qiaofeng Technology (Chengdu) Co.,Ltd. Address before: No. 1513, 15th floor, building 2, No. 366, Xinsheng Road, Xindu street, Xindu District, Chengdu, Sichuan 610500 Patentee before: Chengdu zesaipu Petroleum Engineering Technology Service Co.,Ltd. |