CN214997541U - Anchoring seal assembly and downhole tool with same - Google Patents
Anchoring seal assembly and downhole tool with same Download PDFInfo
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- CN214997541U CN214997541U CN202121398077.0U CN202121398077U CN214997541U CN 214997541 U CN214997541 U CN 214997541U CN 202121398077 U CN202121398077 U CN 202121398077U CN 214997541 U CN214997541 U CN 214997541U
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Abstract
The utility model relates to a construction field in the oil well, concretely relates to anchoring seal assembly and have its downhole tool, anchoring seal assembly is for having the integrative structure of axial toper through-hole to the cover is established at the spindle of downhole tool, anchoring seal assembly has the spiral gap that radially runs through, between the spiral gap anchoring seal assembly including sealed anchoring main part and be used for with the locking main part of the spacing locking of the dabber of downhole tool. The anchoring seal assembly is provided with a spiral structure, only part of the spiral structure is a locking main body, and therefore a sealing surface between the inner surface of the sealing anchoring main body and the outer surface of the mandrel is in surface contact, so that the sealing anchoring main body has a good sealing effect, and the problem of sealing failure is avoided. Meanwhile, when in locking, only the locking body retracts and locks in the radial direction, and the sealing anchoring body does not retract, so that the outer surface of the sealing anchoring assembly and the inner wall of the well bore can be reliably anchored and sealed.
Description
Technical Field
The utility model relates to a construction field in the oil well, concretely relates to anchoring seal assembly and have its downhole tool.
Background
Be used for sealed anchoring structure in the downhole tool after sealed anchoring, sealed anchor takes place relative displacement with the dabber of downhole tool easily, and its is sealed can receive the influence, still can cause unable effective anchoring simultaneously, produces the potential safety hazard. In order to ensure that the anchoring part and the mandrel do not move relatively, the whole surface of the inner surface of the anchoring part or the sealing part is provided with a limiting structure anchored with the outer surface of the mandrel, and when the limiting structure is locked for limiting, the sealing surface of the mandrel is not in surface contact because the whole sealing surface of the outer surface of the mandrel and the inner surface of the anchoring and sealing structure is provided with the limiting structure, so that the sealing effect of the outer surface of the mandrel is influenced; furthermore, the anchor and seal may radially retract, which may cause the seal to fail.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve foretell technical problem and provide an anchoring seal assembly and instrument in pit to improve the locking and the sealed effect of anchoring spare and sealing member and dabber outer wall.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an anchoring seal assembly, the anchoring seal assembly is of an integral structure with an axial taper through hole and is sleeved on a mandrel of a downhole tool, the anchoring seal assembly is provided with spiral gaps penetrating in the radial direction, and the anchoring seal assembly between the spiral gaps comprises a seal anchoring main body and a locking main body used for limiting and locking with the mandrel of the downhole tool.
The utility model discloses a theory of operation and beneficial effect are: because the anchoring sealing assembly is arranged to be in a spiral structure, only part of the spiral structure is a locking main body, and the outer surface of the mandrel is provided with the mandrel locking structure which is limited and locked with the mandrel locking main body, a sealing surface between the inner surface of the anchoring main body and the outer surface of the mandrel is in surface contact, so that the anchoring sealing assembly has a good sealing effect and the problem of sealing failure is avoided. Meanwhile, when the locking structure is locked, the locking main body of the spiral structure has a retraction force towards the axis direction after being radially expanded, the locking main body is directly retracted in the radial direction through the retraction force to be matched and locked with the mandrel locking structure, and the sealing anchoring main bodies at other parts cannot be retracted, so that the outer surface of the sealing anchoring assembly and the inner wall of a shaft are reliably anchored and sealed, and the integral anchoring and sealing effect of the ball seat cannot be influenced. Furthermore, because the anchoring sealing assembly is of a spiral structure, the spiral structure needs a certain initial force to expand, and the effect of preventing the early setting can be achieved.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the inner surface of the locking body is provided with locking teeth.
The beneficial effect of adopting the further scheme is that: the mandrel locking structure is a locking groove which is also arranged into a locking tooth structure, and the mutual locking effect of the locking main body and the mandrel is ensured through the mutual matching locking of the locking teeth.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the anchor seal assembly is a variable pitch construction, the locking body is located at a smaller inner diameter end of the anchor seal assembly, and the pitch of the locking body is less than the pitch of the seal anchor body.
The beneficial effect of adopting the further scheme is that: generally, the locking groove on the outer surface of the mandrel is of a groove structure, the groove is provided with a groove side surface in the radial direction of the mandrel, the groove side surface far away from the small end of the mandrel is an inclined side surface, the small end of the mandrel is far away from the opening of the inclined side surface, and after the sealing anchoring main body in the anchoring sealing assembly moves to the groove, the sealing anchoring main body can be smoothly moved out of the groove along the inclined surface under the action of external thrust, so that the sealing locking of the anchoring sealing assembly to a shaft is ensured. By adopting the structure of the further technical scheme, the width of the locking groove matched with the locking groove in the axial direction of the mandrel is set to be larger than the thread pitch of the locking main body and smaller than the thread pitch of the sealing anchoring main body; therefore, in the process that the anchoring sealing assembly moves relative to the mandrel, the sealing anchoring main body cannot fall into the locking groove, and the efficiency of the anchoring sealing assembly and the downhole tool thereof in downhole construction is improved.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the seal anchor body has a seal section and an anchor section, the seal section having a seal boss.
The beneficial effect of adopting the further scheme is that: the sealing section is arranged to be the sealing boss, when the sealing section is under radial pressure, the surface area of the boss is small, and under the condition of the same pressure, the pressure intensity on the boss is large, so that the boss is easily extruded into the inner wall of the shaft and forms sealing with the inner wall of the shaft, and the sealing effect is improved.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the sealing sections and the anchoring sections are all multi-section and are arranged alternately.
The beneficial effect of adopting the further scheme is that: the multistage sealing and multistage anchoring are realized, and the sealing and anchoring effect of the ball seat is further improved.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the seal segment is located at one end with a larger inner diameter of the seal anchor body, the spiral slit does not penetrate through the seal segment in the axial direction of the seal anchor body, and the seal boss has at least one complete circle of boss in the circumferential direction of the outer surface of the seal segment.
The beneficial effect of adopting the further scheme is that: the sealing effect of the ball seat in the whole circumferential direction is ensured by at least one circle of complete sealing boss, and the leakage condition is avoided.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the sealing boss is a multi-circle sealing boss which is consistent with the spiral direction of the spiral gap.
The beneficial effect of adopting the further scheme is that: multistage sealing is realized by the multi-circle spiral sealing lug boss, and the sealing effect is ensured.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the surface of the anchoring section is arranged in a wave shape.
The beneficial effect of adopting the further scheme is that: wave crests in the wavy anchoring surface are subjected to higher pressure, so that the anchoring section and the inner wall of the shaft are anchored conveniently; meanwhile, the anchoring section at the peak position can also play a role in auxiliary sealing.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the surface of the anchoring section is provided with an anchoring layer.
The beneficial effect of adopting the further scheme is that: the anchoring layer further improves the anchoring effect of the anchoring section.
The utility model also provides a downhole tool, including foretell anchoring seal assembly and dabber, the spindle be provided with the locking groove that the locking main part matches.
The downhole tool has the beneficial effects that: due to the locking groove in which the locking body is matched, when the anchoring seal assembly in the downhole tool is moved to a set position on the mandrel, the locking body falls back into the locking groove in the radial direction by virtue of its resilient properties, enabling locking of the anchoring seal assembly and the mandrel. The sealing surface between the inner surface of the anchoring sealing structure and the outer surface of the mandrel is in surface contact, so that the anchoring sealing structure has a good sealing effect, and the problem of sealing failure is avoided. Only the locking body retracts and locks in the radial direction, and the sealing anchoring bodies at other parts do not retract, so that the outer surface of the sealing anchoring body and the inner wall of the shaft can be reliably anchored and sealed, and the overall anchoring and sealing effect of the ball seat cannot be influenced.
Drawings
Fig. 1 is a schematic perspective view of a first embodiment of an anchoring seal assembly according to the present invention;
FIG. 2 is a cross-sectional view in one direction of a first embodiment of an anchor seal assembly;
FIG. 3 is a schematic structural view of an embodiment of a mandrel mated with an embodiment of an anchor seal assembly;
FIG. 4 is a schematic view of a first operating condition of a first embodiment of a downhole tool in cooperation with a first embodiment of a mandrel, according to an embodiment of an anchor seal assembly;
FIG. 5 is a schematic view of a second operating condition of a first embodiment of a downhole tool in cooperation with a first embodiment of a mandrel, in accordance with an embodiment of an anchor seal assembly;
FIG. 6 is a cross-sectional view in one direction of an embodiment of an anchor seal assembly;
FIG. 7 is a schematic view of a second operating condition of the embodiment of the downhole tool with a second embodiment of the anchor seal assembly engaged with a second embodiment of the mandrel;
FIG. 8 is a cross-sectional view in one direction of a third embodiment of the anchor seal assembly;
FIG. 9 is a schematic view of a third embodiment of an anchor seal assembly in a second operating condition in cooperation with a third embodiment of a mandrel in a downhole tool;
FIG. 10 is a cross-sectional view in one direction of an embodiment of an anchor seal assembly;
FIG. 11 is a schematic view of an embodiment of an anchor seal assembly in a fourth, second operating condition of a downhole tool in cooperation with an embodiment of a mandrel in accordance with a second embodiment of the anchor seal assembly;
FIG. 12 is a cross-sectional view in one direction of an embodiment of an anchor seal assembly;
FIG. 13 is a schematic view of an embodiment of an anchor seal assembly in a fifth second operational state in cooperation with an embodiment of a mandrel in a downhole tool.
In the drawings, the components represented by the respective reference numerals are listed below:
1. spiral slot, 2, seal anchor body, 21, seal segment, 22, anchor segment, 3, locking body, 4, circle seal boss, 5, mandrel, 51, locking groove, 6, wellbore
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
The first embodiment of the anchoring seal assembly, the first embodiment of the mandrel, and the first embodiment of the downhole tool of the present invention are schematically illustrated in fig. 1 to 5.
The anchoring sealing assembly is of an integrated structure with an axial conical through hole and is sleeved on a mandrel of a downhole tool, the anchoring sealing assembly is provided with spiral gaps 1 which penetrate radially, and the anchoring sealing assembly between the spiral gaps 1 comprises a sealing anchoring main body 2 and a locking main body 3 which is used for limiting and locking with the mandrel of the downhole tool.
In the present embodiment, the inner surface of the locking body 3 is provided with locking teeth, the mandrel is provided with a locking groove 51 matching with the locking body 3, and the locking teeth and the locking groove 51 are provided in plurality. The anchoring seal assembly is of a constant pitch helical configuration and the locking groove 51 has a width in the axial direction of the mandrel 5 which is 1.5 times the pitch of the locking body 3.
The anchoring seal assembly is arranged to be in a spiral structure, only part of the spiral structure is a locking main body, and therefore the sealing surface between the inner surface of the sealing anchoring main body and the outer surface of the mandrel is in surface contact, so that the sealing anchor assembly has a good sealing effect and the problem of sealing failure is avoided. Meanwhile, when the ball seat is locked, only the locking main body retracts and locks in the radial direction, and the sealing anchoring main bodies at other parts do not retract, so that the outer surface of the sealing anchoring main body and the inner wall of the shaft can be reliably anchored and sealed, and the overall anchoring and sealing effect of the ball seat cannot be influenced.
The existing limiting tooth structure on the whole surface of a mandrel of the downhole tool, the anchoring element and the sealing element can be retracted in the radial direction, the setting tool needs to provide a larger setting stroke to ensure the sealing anchoring, and if the setting stroke is not enough, the problem of sealing failure can be caused. According to the anchoring seal assembly provided by the embodiment, when the anchoring seal assembly is locked, the locking body 3 of the spiral structure has a retraction force towards the axial direction after being radially expanded, the locking body 3 on the anchoring seal assembly is radially retracted and locked directly through the retraction force, and the sealing anchoring bodies at other parts cannot be retracted, so that the outer surface of the sealing anchoring body and the inner wall of a well bore can be reliably anchored and sealed, and the whole anchoring and sealing effect of the ball seat cannot be influenced. Furthermore, because the anchoring sealing assembly is of a spiral structure, the spiral structure needs a certain initial force to expand, and the effect of preventing the early setting can be achieved.
Furthermore, when the seat sealing is completed underground, partial locking main bodies 3 are ensured to retract into the locking grooves 51 through self elasticity, and the limiting locking effect of the locking structure is ensured by arranging a plurality of locking teeth to be locked and limited mutually.
In the present exemplary embodiment, the seal anchor body 2 has a sealing section 21 and an anchor section 22, the sealing section 21 having a sealing projection 4. The sealing structure comprises two sealing sections 21 and two anchoring sections 22, wherein the sealing sections 21 and the anchoring sections 22 are alternately arranged.
In the present embodiment, the sealing boss is a plurality of turns of the sealing boss 4 in accordance with the spiral direction of the spiral slit 1.
The sealing section is arranged to be the sealing boss, when the sealing section is under radial pressure, the surface area of the boss is small, and under the condition of the same pressure, the pressure intensity on the boss is large, so that the boss is easily extruded into the inner wall of the shaft and forms sealing with the inner wall of the shaft, and the sealing effect is improved. The sealing sections 21 and the anchoring sections 22 which are alternately arranged realize multi-stage sealing and multi-stage anchoring, and further improve the sealing and anchoring effects of the ball seat. The ring sealing boss 4 with the spiral structure realizes multistage sealing of the boss, and further improves the sealing effect of the underground tool.
In the present embodiment, the surface of the anchor segment 22 is provided in a wave shape, and the surface of the anchor segment 22 is provided with an anchor layer.
Wave crests in the wavy anchoring surface are subjected to higher pressure, so that the anchoring section and the inner wall of the shaft are anchored conveniently; meanwhile, the anchoring section at the wave crest position can also play a role in auxiliary sealing; the anchoring layer further improves the anchoring effect of the anchoring section.
In this embodiment, the locking body 3 is located at the smaller inner diameter end of the anchor seal assembly. The locking position is located at the opposite end of the downhole tool, which is pressed, so that the whole pressure of the downhole tool is borne, and the limiting and locking effect is improved.
In the working state of this embodiment, as shown in fig. 4 to 5, the downhole tool of the first embodiment is placed in the wellbore 6, and the anchor seal assembly is pressed to the outer side (the left end as shown in the figure) of the large end of the mandrel 5 by the setting tool, because the anchor seal assembly is of a spiral structure, the distance spread in the radial direction is large, the large elongation rate of the anchor seal assembly in the radial direction is realized, and the wellbore sealing of the large inner diameter end can be realized. When the seal anchor body 2 in the anchor seal assembly is deployed and extended to the inner wall of the well bore 6 to be sealingly anchored therewith, and the plurality of locking teeth on the inner surface of the locking body 3 are locked in cooperation with the plurality of locking grooves 51 on the outer surface of the mandrel 5, a spacing anti-slip is achieved (as shown in fig. 5).
The second embodiment of the anchoring seal assembly of the present invention and the second embodiment of the downhole tool matched therewith are illustrated in fig. 6 and 7.
The difference between this embodiment and the first embodiment is that the inner surface of the locking body 3 is not provided with locking teeth, the locking groove 51 on the outer surface of the mandrel 5 is provided with a groove structure, the groove has a groove side surface in the radial direction of the mandrel 5, the groove side surface far away from the small end of the mandrel 5 is an inclined side surface, the inclined side surface is opened at the small end far away from the mandrel 1, and the width of the groove in the axial direction of the mandrel 5 is 1.5 times of the thread pitch of the locking body 3.
By arranging the groove, the retracted locking main body 3 is directly matched and locked with the groove, so that the structure of the locking structure is simplified; meanwhile, the side face of the groove is arranged to be an inclined face, after the sealing anchoring main body in the anchoring sealing assembly moves to the groove, the sealing anchoring main body can be smoothly moved out of the groove along the inclined face under the action of external thrust, and sealing locking of the anchoring sealing assembly to a shaft is guaranteed.
The third embodiment of the anchoring seal assembly of the present invention and the third embodiment of the downhole tool matched therewith are shown in fig. 8 and 9.
The difference between this embodiment and the second embodiment is that the anchor seal assembly is of a variable pitch construction, the locking body 3 is located at the smaller inner diameter end of the anchor seal assembly, and the pitch of the locking body 3 is smaller than the pitch of the seal anchor body 2. In this embodiment, the locking groove 51 on the outer surface of the mandrel 5 in the third downhole tool embodiment to which it is mated is provided as a groove, wherein the pitch of the seal anchor body 2 is 1.5 times the pitch of the locking body 3 and the width of the groove in the axial direction of the mandrel 5 is 1.2 times the pitch of the locking body 3.
Because the recess is greater than the pitch of locking main part 3 at 5 epaxial width of dabber, is less than the pitch of sealed anchor main part 2, like this, the in-process that the anchor seal assembly was moving to the dabber, sealed anchor main part 2 just can not fall into the recess, has improved the efficiency of downhole tool construction, also need not set up the inclined plane in the side of recess simultaneously, and the course of working is also fairly simple.
The fourth embodiment of the anchoring seal assembly of the present invention, and the second embodiment of the downhole tool matched therewith, are illustrated in fig. 10 and 11.
The present embodiment differs from the second embodiment in that the sealing segment 21 is located at the larger inner diameter end of the seal anchor body 2, the spiral slit 1 does not penetrate the sealing segment 21 in the axial direction of the seal anchor body 2, and the sealing boss 4 has at least one complete ring of boss in the circumferential direction of the outer surface of the sealing segment 21.
The sealing section 21 in this embodiment has a complete sealing boss on the outer surface in the circumferential direction, so that the sealing effect of the ball seat in the entire circumferential direction is ensured, and no leakage is generated.
In a specific embodiment, a plurality of complete sealing bosses may be provided on the outer circumferential surface of the sealing section 21 according to the use condition of the ball seat to improve the sealing reliability.
Reference is made to fig. 12-13 for a fifth embodiment of the anchoring seal assembly and a third embodiment of a downhole tool adapted thereto.
The present embodiment differs from the third embodiment in that the sealing segment 21 is located at the larger inner diameter end of the seal anchor body 2, the spiral slit 1 does not penetrate the sealing segment 21 in the axial direction of the seal anchor body 2, and the sealing boss 4 has at least one complete ring of boss in the circumferential direction of the outer surface of the sealing segment 21.
In a specific embodiment, the locking groove 51 may be configured as a spiral structure matching the spiral direction of the locking body 3, so that most of the locking body 3 may fall into the locking groove 51 and contact with the matching surface thereof, so that the locking body 3 and the locking groove 51 have a larger contact area in the radial direction, and the locking limit reliability of the locking body 3 and the locking groove 51 is improved. Such as: the locking body 3 and the locking groove 51 are provided in a locking tooth structure, a spiral groove structure, etc. to be locked to each other.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. An anchoring seal assembly, characterized in that it is a unitary structure with an axially tapered through hole and fits over the mandrel of a downhole tool, said anchoring seal assembly having a radially penetrating spiral slit (1), said anchoring seal assembly between said spiral slits (1) comprising a seal anchoring body (2) and a locking body (3) for positive locking with the mandrel of the downhole tool.
2. An anchoring seal assembly according to claim 1, characterized in that the inner surface of the locking body (3) is provided with locking teeth.
3. An anchoring seal assembly according to claim 1, characterized in that it is of variable pitch construction, the locking body (3) being located at the smaller inner diameter end of the assembly, the pitch of the locking body (3) being smaller than the pitch of the seal anchoring body (2).
4. An anchoring seal assembly according to any one of claims 1 to 3, characterised in that the seal anchor body (2) has a seal section (21) and an anchor section (22), the seal section (21) having a seal boss (4).
5. An anchoring seal assembly according to claim 4, characterized in that said sealing segments (21) and said anchoring segments (22) are in a plurality of segments alternating with each other.
6. An anchoring seal assembly according to claim 4, characterized in that said sealing segment (21) is located at the end of larger inner diameter of said seal anchor body (2), said spiral slit (1) does not penetrate said sealing segment (21) in the axial direction of said seal anchor body (2), said sealing boss (4) has at least one complete boss in the circumferential direction of the outer surface of said sealing segment (21).
7. An anchoring seal assembly according to claim 4, characterized in that said sealing boss is a plurality of sealing bosses (4) in a spiral direction coinciding with the spiral direction of said spiral slit (1).
8. An anchoring seal assembly according to claim 4, characterized in that the surface of said anchoring section (22) is provided with undulations.
9. An anchored sealing assembly according to claim 4, wherein the surface of said anchoring section (22) is provided with an anchoring layer.
10. A downhole tool comprising an anchoring seal assembly according to claims 1-9 and a mandrel (5) provided with a locking groove (51) matching the locking body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121398077.0U CN214997541U (en) | 2021-06-23 | 2021-06-23 | Anchoring seal assembly and downhole tool with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121398077.0U CN214997541U (en) | 2021-06-23 | 2021-06-23 | Anchoring seal assembly and downhole tool with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214997541U true CN214997541U (en) | 2021-12-03 |
Family
ID=79082168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121398077.0U Active CN214997541U (en) | 2021-06-23 | 2021-06-23 | Anchoring seal assembly and downhole tool with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214997541U (en) |
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2021
- 2021-06-23 CN CN202121398077.0U patent/CN214997541U/en active Active
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