CN214787301U - Packer for oil production pipeline - Google Patents
Packer for oil production pipeline Download PDFInfo
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- CN214787301U CN214787301U CN202120553655.7U CN202120553655U CN214787301U CN 214787301 U CN214787301 U CN 214787301U CN 202120553655 U CN202120553655 U CN 202120553655U CN 214787301 U CN214787301 U CN 214787301U
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Abstract
The utility model discloses a packer for oil production pipeline, including center tube, top connection, lower clutch and from the top down set gradually in sitting seals mechanism, sealing mechanism and slips mechanism on the center tube, sealing mechanism sets up the below of piston, and with the bottom butt of piston, sealing mechanism includes that a plurality of covers establish gasket and packing element on the center tube, be provided with the elastic support skeleton in the packing element, the annular coaxial setting of elastic support skeleton is in inside the packing element. The utility model discloses a set up the elastic support skeleton in the packing element, the annular coaxial setting of elastic support skeleton is in inside the packing element, during the setting, the elastic support skeleton receives pressure and is compressed along with the packing element, and when the packer deblocking, the packing element can more quick reconversion after the pressure is eliminated under the effect of elastic support skeleton, and the compressive capacity and the elastic recovery ability of packing element can be improved to the elastic support skeleton, have improved the use number of times of packing element.
Description
Technical Field
The utility model relates to an oil well shutoff instrument technical field especially relates to a packer is used to oil production pipeline.
Background
In oilfield exploitation operations, temporary sealing of an oil production pipeline is sometimes required to realize operations such as pressure measurement. When the pipeline is plugged by using a plugging tool, a packer is often adopted, and the packer applies mechanical pressure to the packing element to enable the packing element to deform radially, so that a gap between the packing element and the pipeline is filled, and sealing is realized. In the actual use process, after the packer is lowered to a preset position of the oil production pipeline, setting is realized by the setting mechanism, and during setting, under the action of hydraulic pressure, the piston pushes a gap between the upper cone and the lower cone to be reduced, and the slips are outwards opened under the pushing of the upper cone and the lower cone, so that the slips are anchored on the pipe wall of the oil production pipeline. During deblocking, go up the cone and reset with lower cone, the upper and lower both ends resilience shrink of slips breaks away from with the pipeline inner wall.
The environment is unstable in the oil production pipeline, the packer is left in the pipeline after setting, the two ends of the rubber sleeve are subjected to extrusion force to generate deformation when setting, the contact pressure between the middle part of the rubber sleeve and the pipe wall is smaller due to non-direct force, the middle part sealing performance is unstable, the rubber sleeve is easy to soften under the high-temperature and high-pressure environment, when the rubber sleeve is in the high-temperature and high-pressure environment, the rubber sleeve is easy to soften, leakage is caused to cause setting failure, the expected service life cannot be reached in actual use, the rubber sleeve is not easy to shrink when being unset, after the packer is recycled, the rubber sleeve needs to be replaced when being reused, the service life cannot be reached in actual use, and the problem of inconvenient recycling after the unset of the packer is solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough of above-mentioned prior art, provide a packer for oil production pipeline.
In order to solve the above problems, the utility model adopts the following technical proposal:
a packer comprises a central pipe, an upper joint, a lower joint, a setting mechanism, a sealing mechanism and a slip mechanism, wherein the upper joint is arranged at the upper end of the central pipe in a threaded connection mode, the lower joint is arranged at the lower end of the central pipe in a threaded connection mode, the setting mechanism, the sealing mechanism and the slip mechanism are sequentially arranged on the central pipe from top to bottom, the setting mechanism comprises a piston sleeve and a piston which is arranged in the piston sleeve and slides along the inner wall of the piston sleeve, a pressure cavity is formed in the space above the piston in the piston sleeve, a liquid outlet hole is formed in the side wall of the central pipe and communicated with the pressure cavity, a nut body is arranged in the upper joint in a threaded fit mode and comprises an internal thread and an external thread, the internal thread of the nut body is in threaded connection with the upper joint, and the external thread of the nut body is in threaded connection with the piston sleeve; the sealing mechanism is arranged below the piston and is abutted against the bottom of the piston, the sealing mechanism comprises a plurality of gaskets and a rubber cylinder which are sleeved on the central tube, an elastic supporting framework is arranged in the rubber cylinder, and the elastic supporting framework is arranged in the rubber cylinder in an annular shape and is concentrically arranged in the rubber cylinder; the slip mechanism comprises a slip sleeve, an upper cone and a lower cone which are respectively arranged at two ends of the slip sleeve, and a slip body which is arranged in the slip sleeve and slides along the radial direction of the slip sleeve, wherein inclined planes are respectively arranged at the upper part and the lower part of the inner side of the slip body, and the inclined planes are matched with the corresponding upper cone and the corresponding lower cone.
Further, a plurality of slips body annular distribution sets up in the slips sleeve, the middle part of slips body lateral wall is provided with curved recess along the horizontal direction, two jack catchs about the recess is separated into the slips body, on the slips sleeve with the slotted hole that supplies the jack catch to stretch out, withdraw is seted up to the corresponding position of jack catch, be provided with the elastic component in the recess, the slips sleeve with the corresponding position of recess is provided with the supporting part, the both ends of elastic component respectively with recess bottom and the telescopic supporting part butt of slips.
Furthermore, the elastic part is a spring, one end of the spring is abutted to the bottom of the groove, and the other end of the spring is abutted to the supporting part.
Further, the outer surface of the clamping jaw is provided with a carburized layer.
Furthermore, the elastic support framework is an annular frame body consisting of a plurality of support sheets, and the support sheets are connected into a whole through connecting strips.
Further, the supporting sheet comprises a vertical portion and an inclined portion, the inclined portion is symmetrically arranged at the upper end and the lower end of the vertical portion, and the vertical portion and the inclined portion are integrally formed.
Further, a shearing pin is arranged between the outer wall of the piston and the inner wall of the piston sleeve.
Furthermore, the rubber cylinders of the sealing mechanism are multiple, a plurality of gaskets and the rubber cylinders are sleeved on the central pipe at intervals, the gaskets are arranged at two ends of the sealing mechanism, and the gaskets at two ends of the sealing mechanism are respectively abutted to the piston and the upper cone.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the utility model discloses a set up the elastic support skeleton in the packing element, the elastic support skeleton becomes cyclic annular concentric setting inside the packing element, during the setting, the elastic support skeleton receives pressure and is compressed along with the packing element, when the packer deblocking, the packing element can more quick reconversion under the effect of elastic support skeleton after the pressure elimination, the compressive capacity and the elastic recovery ability of packing element can be improved to the elastic support skeleton, have improved the use number of times of packing element; the utility model discloses a sealing mechanism includes that a plurality of covers establish gasket and packing element on the center tube, the effect of support, transmission power can be played to the gasket for a plurality of packing elements atress when the setting is even, and sealed effect is better.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a schematic structural view of an elastic support frame according to an embodiment of the present invention;
fig. 4 is an exploded view of the slip mechanism in an embodiment of the present invention.
In the figure: 1. a central tube; 2. an upper joint; 3. a lower joint; 4. a piston sleeve; 5. a piston; 6. a pressure chamber; 7. a liquid outlet hole; 8. a nut body; 9. a gasket; 10. a rubber cylinder; 11. an elastic support frame; 12. a slip sleeve; 13. an upper cone; 14. a slip body; 15. a support sheet; 16. a connecting strip; 17. a vertical portion; 18. an inclined portion; 19. a lower cone; 20. a groove; 21. a claw; 22. a slot; 23. an elastic member; 24. shearing off the pin; 25. and (5) steel balls.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-4, the packer for the oil production pipe of the present invention comprises a central pipe 1, an upper joint 2 disposed at the upper end of the central pipe 1 in a threaded connection manner, a lower joint 3 disposed at the lower end of the central pipe 1 in a threaded connection manner, and a setting mechanism, a sealing mechanism and a slip mechanism sequentially disposed on the central pipe 1 from top to bottom, wherein the setting mechanism comprises a piston sleeve 4, a piston 5 disposed in the piston sleeve 4 and sliding along the inner wall of the piston sleeve 4, a pressure chamber 6 is formed in the piston sleeve 4 above the piston 5, a liquid outlet 7 is disposed on the side wall of the central pipe 1, the liquid outlet 7 is communicated with the pressure chamber 6, a nut body 8 is disposed in the upper joint 2 in a threaded fit manner, the nut body 8 comprises an internal thread and an external thread, and the internal thread of the nut body 8 is in threaded connection with the upper joint 2, the external thread of the nut body 8 is in threaded connection with the piston sleeve 4; the nut body is used for sealing and connecting the upper joint and the piston sleeve, the nut body is convenient to screw to required torque when being installed, and the sealing performance between parts is good.
The sealing mechanism is arranged below the piston 5 and is abutted against the bottom of the piston 5, the sealing mechanism comprises a plurality of gaskets 9 and a rubber cylinder 10 which are sleeved on the central tube 1, an elastic supporting framework 11 is arranged in the rubber cylinder 10, and the elastic supporting framework 11 is annularly and coaxially arranged in the rubber cylinder 10;
slips mechanism includes slips sleeve 12, sets up respectively the last cone 13 and the lower cone 19, the setting at slips sleeve 12 both ends are in inside and edge slips sleeve 12 radial direction gliding slips body 14 of slips sleeve 12, slips body 14 upper portion and lower part all are provided with the inclined plane, the inclined plane and corresponding go up cone 13 and 19 looks adaptations of cone down, cone and lower clutch butt down.
Further, 14 annular distributions of a plurality of slips bodies set up in the slips sleeve 12, the middle part of slips body 14 lateral wall is provided with curved recess 20 along the horizontal direction, two jack catchs 21 about recess 20 separates into slips body 14, on the slips sleeve 12 with the slotted hole 22 that supplies jack catch 21 to stretch out, withdraw is seted up to the corresponding position of jack catch 21, be provided with elastic component 23 in the recess 20, slips sleeve 12 with the corresponding position of recess 20 is provided with the supporting part, the both ends of elastic component 23 respectively with the supporting part butt of recess 20 bottom and slips sleeve 12.
Further, the elastic part 23 is a spring, a clamp spring or other elastic parts, one end of the spring is abutted against the bottom of the groove 20, and the other end of the spring is abutted against the supporting part.
Current packer receives part material and service environment's influence, and the slips body often can not anchor completely on the pipe wall, can't play the effect of being fixed in the pipeline with the packer, and during the deblocking, the slips body can't independently retract, and the packer can't normally be withdrawed, leads to the condition of sticking to bore to take place. The utility model discloses a set up the elastic component between slips body and slips sleeve inner wall, pressure removes the back when the deblocking, and under the effect of elastic component, the slips can be withdrawed automatically, has avoided the risk of sticking the brill.
Further, the outer surface of the jaw 21 is provided with a carburized layer, which can improve the surface hardness of the jaw 21, and when the slip body 14 is expanded outwards, the jaw 21 can be reliably anchored on the pipe wall of the pipe.
Further, the elastic support frame 11 is an annular frame body composed of a plurality of support sheets 15, and the plurality of support sheets 15 are connected into a whole through a connecting strip 16.
Further, the support sheet 15 includes a vertical portion 17 and an inclined portion 18, the inclined portion 18 is symmetrically disposed at upper and lower ends of the vertical portion 17, and the vertical portion 17 and the inclined portion 18 are integrally formed.
The utility model discloses a backing sheet 15 of elastic support skeleton 11 adopts spring steel integrated into one piece to process the preparation and forms, and vertical portion 17 takes place elastic deformation with rake 18 when receiving the pressure that comes from the axial direction, along with packing element 10 equidirectional radial expansion, after pressure disappears, packing element 10 and elastic support skeleton 11 can the reconversion fast, and through setting up the elastic support skeleton, the elastic support skeleton becomes cyclic annular concentric setting inside the packing element, during the setting, the elastic support skeleton receives pressure and is compressed along with the packing element together, and when the packer deblocking, the reconversion that the packing element can be faster under the effect of elastic support skeleton behind the pressure elimination has avoided the problem that the packing element is difficult to elastic recovery for long-time pressurized, and elastic support skeleton 11 can improve the compressive capacity and the elastic recovery ability of packing element 10, has improved the life and the number of times of packing element 10.
Further, a shearing pin 24 is arranged between the outer wall of the piston and the inner wall of the piston sleeve.
Furthermore, the rubber cylinders 10 of the sealing mechanism can be multiple, a plurality of gaskets 9 and the rubber cylinders 10 are sleeved on the central pipe at intervals, the gaskets 9 are arranged at two ends of the sealing mechanism, and the gaskets 9 at two ends of the sealing mechanism are respectively abutted to the piston 5 and the upper cone 13. The utility model discloses a sealing mechanism includes that a plurality of covers establish gasket and packing element on the center tube, the effect of support, transmission power can be played to the gasket for a plurality of packing elements atress when the setting is even, and sealed effect is better.
The utility model discloses a work flow does:
the packer is put to a preset position of a production pipeline, a steel ball 25 is thrown in from a central tube 1, the outlet end of a lower joint 3 is sealed, drilling fluid with certain pressure is injected into the central tube 1, the drilling fluid enters the central tube 1 and then enters a pressure cavity 6 through a liquid outlet hole 7, when the pressure reaches a certain value, a shearing pin 24 between a piston and a piston sleeve is sheared, the drilling fluid pushes the piston 5 to move downwards, the sealing mechanism and a slip mechanism are gradually pressed tightly in the downward movement process of the piston 5, a slip body 14 extends out of a slip sleeve 12 under the combined action of an upper cone 12 and a lower cone 19, and the claw 21 is anchored with the inner wall of the production pipeline; the piston continues to move downwards to extrude the rubber cylinder to radially open, so that the aim of setting is fulfilled. When the needs deblocking, stop to pour into drilling fluid into, promote the piston power down and disappear the back, in slips body retractile slips sleeve 12 under the effect of elastic component 23, the packing element reverts to the original state under the effect of packing element self and elastic support skeleton, takes out the packer. The utility model discloses a packer can play the effect of sealing off at oil production pipeline temporarily, and the construction is simple, is convenient for take out after the deblocking, and can used repeatedly after the packer takes out.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (8)
1. The utility model provides a packer for oil production pipeline, include center tube (1), threaded connection set up in top connection (2), threaded connection on center tube (1) set up in lower clutch (3) of center tube (1) lower extreme and from the top down set gradually in setting mechanism, sealing mechanism and slips mechanism on center tube (1), its characterized in that: the setting mechanism comprises a piston sleeve (4) and a piston (5) which is arranged in the piston sleeve (4) and slides along the inner wall of the piston sleeve (4), a pressure cavity (6) is formed in a space above the piston (5) in the piston sleeve (4), a liquid outlet hole (7) is formed in the side wall of the central tube (1), the liquid outlet hole (7) is communicated with the pressure cavity (6), a nut body (8) is arranged on the upper connector (2) in a threaded fit manner, the nut body (8) comprises an internal thread and an external thread, the internal thread of the nut body (8) is in threaded connection with the upper connector (2), and the external thread of the nut body (8) is in threaded connection with the piston sleeve (4);
the sealing mechanism is arranged below the piston (5) and is abutted against the bottom of the piston (5), the sealing mechanism comprises a plurality of gaskets (9) and a rubber cylinder (10) which are sleeved on the central pipe (1), an elastic supporting framework (11) is arranged in the rubber cylinder (10), and the elastic supporting framework (11) is annularly and coaxially arranged in the rubber cylinder (10);
the slip mechanism comprises a slip sleeve (12), an upper cone (13) and a lower cone (19) which are arranged at two ends of the slip sleeve (12) respectively, and a slip body (14) which is arranged inside the slip sleeve (12) and slides along the radial direction of the slip sleeve (12), wherein inclined planes are arranged on the upper portion and the lower portion of the inner side of the slip body (14), and the inclined planes are matched with the upper cone (13) and the lower cone (19) correspondingly.
2. A packer for a production tubing according to claim 1, wherein: a plurality of slips bodies (14) ring shape distributes and sets up in slips sleeve (12), the middle part of slips body (14) lateral wall is provided with curved recess (20) along the horizontal direction, two jack catchs (21) about recess (20) are separated into slips body (14), on slips sleeve (12) with slotted hole (22) that supply jack catch (21) to stretch out, withdraw are seted up to the corresponding position of jack catch (21), be provided with elastic component (23) in recess (20), slips sleeve (12) with the corresponding position of recess (20) is provided with the supporting part, the both ends of elastic component (23) respectively with the supporting part butt of recess (20) and slips sleeve (12).
3. A packer for a production tubing according to claim 2, wherein: the elastic piece (23) is a spring, one end of the spring is abutted to the groove (20), and the other end of the spring is abutted to the supporting portion.
4. A packer for a production tubing according to claim 2, wherein: and a carburized layer is arranged on the outer surface of the clamping jaw (21).
5. A packer for a production tubing according to claim 1, wherein: the elastic support framework (11) is an annular frame body consisting of a plurality of support sheets (15), and the support sheets (15) are connected into a whole through connecting strips (16).
6. A packer for a production tubing according to claim 5, wherein the support sheet (15) comprises a vertical portion (17) and an inclined portion (18), the inclined portion (18) is symmetrically provided at upper and lower ends of the vertical portion (17), and the vertical portion (17) and the inclined portion (18) are integrally formed.
7. A packer for a production tubing according to claim 1, wherein: and a shearing pin (24) is arranged between the outer wall of the piston and the inner wall of the piston sleeve.
8. A packer for a production tubing according to claim 1, wherein: sealing mechanism's packing element (10) are a plurality of, and a plurality of gaskets (9) and packing element (10) interval cover are established on the center tube, sealing mechanism's both ends all are provided with gasket (9), gasket (9) at sealing mechanism both ends respectively with piston (5) and last cone (13) butt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120553655.7U CN214787301U (en) | 2021-03-18 | 2021-03-18 | Packer for oil production pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120553655.7U CN214787301U (en) | 2021-03-18 | 2021-03-18 | Packer for oil production pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214787301U true CN214787301U (en) | 2021-11-19 |
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ID=78665822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120553655.7U Active CN214787301U (en) | 2021-03-18 | 2021-03-18 | Packer for oil production pipeline |
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| Country | Link |
|---|---|
| CN (1) | CN214787301U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458224A (en) * | 2022-02-17 | 2022-05-10 | 成都理工大学 | Underground water circulation well internal packer and use method thereof |
-
2021
- 2021-03-18 CN CN202120553655.7U patent/CN214787301U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458224A (en) * | 2022-02-17 | 2022-05-10 | 成都理工大学 | Underground water circulation well internal packer and use method thereof |
| CN114458224B (en) * | 2022-02-17 | 2023-04-04 | 成都理工大学 | Underground water circulation well internal packer and use method thereof |
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