CN220015120U - Expansion packer and tool pipe string - Google Patents
Expansion packer and tool pipe string Download PDFInfo
- Publication number
- CN220015120U CN220015120U CN202321292425.5U CN202321292425U CN220015120U CN 220015120 U CN220015120 U CN 220015120U CN 202321292425 U CN202321292425 U CN 202321292425U CN 220015120 U CN220015120 U CN 220015120U
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- rubber cylinder
- cylinder seat
- tension spring
- seat
- packer
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- 230000001012 protector Effects 0.000 claims abstract description 31
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000012856 packing Methods 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The utility model provides an expansion type packer and a tool pipe string, wherein the expansion type packer comprises a central pipe, a rubber cylinder seat and a tension spring shoulder pad, wherein the rubber cylinder, the rubber cylinder seat and the rubber cylinder seat are sleeved on the central pipe, the upper end of the rubber cylinder is arranged at the lower end of the rubber cylinder seat in a penetrating way and is abutted with a step on the inner wall of the rubber cylinder seat, and the lower end of the rubber cylinder is arranged at the upper end of the rubber cylinder seat in a penetrating way and is abutted with a step on the inner wall of the rubber cylinder seat; the number of the tension spring shoulder protectors is at least one, and the tension spring shoulder protectors are arranged between the lower end of the upper rubber cylinder seat and the step of the outer wall of the rubber cylinder or between the upper end of the lower rubber cylinder seat and the step of the outer wall of the rubber cylinder; the tension spring shoulder pad is used for supporting the shoulder of the rubber cylinder so as to prevent the shoulder from being partially torn when the rubber cylinder is in setting expansion; the upper rubber cylinder seat and the lower rubber cylinder seat can expand along with expansion and setting of the rubber cylinder so as to protect the rubber cylinder and the tension spring shoulder pad. The expansion packer can be repeatedly and effectively set under the high-pressure working condition, and has high production efficiency.
Description
Technical Field
The utility model relates to the technical field of downhole tools of oil and gas fields, in particular to an expansion packer and a tool string.
Background
At present, the expansion type packer is a packing tool which is most widely applied to oil and gas fields, but the problems of deformation of a packer rubber, damage of a shoulder of the rubber and the like frequently occur in field use, and under the working condition of 70MPa, more than 5 times of effective repeated setting is difficult to be achieved by a single expansion type packer, and the problems of low pressure bearing level, insufficient repeatable setting performance and the like exist in the whole expansion type packer, so that the performance of a whole tool pipe column and the field construction efficiency are restricted.
Disclosure of Invention
The present utility model aims to address at least one of the above-mentioned deficiencies of the prior art. For example, one of the purposes of the present utility model is to provide an expandable packer and a tool string to solve the problems of insufficient pressure-bearing level and repeatable setting performance of the expandable packer in the prior art.
In order to achieve the above object, according to one aspect of the present utility model, there is provided an expanding packer, which may include a central tube, a rubber tube seat, and a tension spring shoulder pad, wherein the rubber tube, the rubber tube seat and the rubber tube seat may be all sleeved on the central tube, the upper end of the rubber tube may be disposed at the lower end of the rubber tube seat in a penetrating manner and abut against a step of an inner wall of the rubber tube seat, and the lower end of the rubber tube may be disposed at the upper end of the rubber tube seat in a penetrating manner and abut against a step of an inner wall of the rubber tube seat; the number of the tension spring shoulder protectors can be at least one, and the tension spring shoulder protectors can be arranged between the lower end of the upper rubber cylinder seat and the step of the outer wall of the rubber cylinder or between the upper end of the lower rubber cylinder seat and the step of the outer wall of the rubber cylinder; the tension spring shoulder pad can be used for supporting the shoulder of the rubber cylinder so as to prevent the shoulder from being partially torn when the rubber cylinder is in setting expansion; the upper rubber cylinder seat and the lower rubber cylinder seat can expand along with expansion and setting of the rubber cylinder so as to protect the rubber cylinder and the tension spring shoulder pad.
Alternatively, the number of the tension spring shoulder protectors can be two, and the two tension spring shoulder protectors can be respectively arranged between the lower end of the upper rubber cylinder seat and the step of the outer wall of the rubber cylinder and between the upper end of the lower rubber cylinder seat and the step of the outer wall of the rubber cylinder; the tension spring shoulder pad may include a plurality of layers of tension spring rings, and the diameter of the outer layer of tension spring rings may be larger than the diameter of the inner layer of tension spring rings, the plurality of layers of tension spring rings being tightly wound in the circumferential direction.
Optionally, the lower end of the upper rubber cylinder seat and the upper end of the lower rubber cylinder seat can be provided with a plurality of cutting slits along the axial direction, the plurality of cutting slits can be respectively distributed along the circumferential directions of the upper rubber cylinder seat and the lower rubber cylinder seat, and when the upper rubber cylinder seat and the lower rubber cylinder seat are expanded, the plurality of cutting slits can be expanded to expand the upper rubber cylinder seat and the lower rubber cylinder seat and cling to the inner wall of the sleeve.
Optionally, the expanding packer may further include a connecting sleeve, the connecting sleeve may be sleeved outside the central tube, and an upper end of the connecting sleeve may be penetratingly arranged at a lower end of the lower rubber cylinder seat; and a sealing element can be arranged between the connecting sleeve and the lower rubber cylinder seat and used for keeping a sealing state between the connecting sleeve and the lower rubber cylinder seat when the lower rubber cylinder seat moves up and down along the axial direction.
Optionally, the expanding packer may further include an upper joint, the upper joint may be fixedly connected to an upper end of the central pipe, a lower end of the upper joint may be located between the central pipe and the upper rubber sleeve seat, and a sealing element may be installed between the upper joint and the upper rubber sleeve seat and used for sealing between the upper joint and the upper rubber sleeve seat.
Optionally, the expanding packer may further include a retaining ring, the retaining ring may be inserted into the upper joint, the lower end of the retaining ring may be fixedly connected with the central pipe, a step of an outer wall of the retaining ring may abut against a step of an inner wall of the upper joint, and the retaining ring may be used to prevent separation between the upper joint and the central pipe.
Optionally, a side hole can be formed in the side wall of the central tube, a water hole screw and a filter screen can be installed in the side hole, and a through water hole can be formed in the water hole screw and can be communicated with the inner cavity of the central tube; the filter screen can filter impurities in the liquid, and can prevent the liquid flow channel of the expansion packer from being blocked.
Optionally, a set screw may be installed between the connection sleeve and the central tube, and the set screw may prevent relative displacement between the connection sleeve and the central tube.
Optionally, the highest temperature resistance of the tension spring shoulder pad can be greater than the highest temperature resistance of the rubber cylinder.
In another aspect of the utility model, a tool string is provided that may include an expandable packer as described above.
Compared with the prior art, the utility model has the beneficial effects that at least one of the following contents is included:
the expansion type packer has the design of a double shoulder protection mechanism, can be repeatedly set and unset for many times under the working condition of high temperature and high pressure, for example, the effective repeated setting times can reach more than 10 times under the working condition of high pressure of 80MPa, the high-pressure repeated effective setting of the expansion type packer is realized, the expansion type packer has the advantage of repeated use for many times compared with the common expansion type packer, the problems of low bearing grade, insufficient repeated setting performance and the like of the common expansion type packer are solved, and the on-site production efficiency is improved.
Drawings
The foregoing and other objects and/or features of the utility model will become more apparent from the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 illustrates an overall block diagram of an inflatable packer according to an exemplary embodiment of the utility model.
FIG. 2 illustrates a tension spring shoulder pad schematic in an inflatable packer of an exemplary embodiment of the utility model.
FIG. 3 illustrates a cross-sectional view of a packing element seat at a cutting seam in an inflatable packer according to an exemplary embodiment of the utility model.
Reference numerals illustrate:
1. central tube, 11, side opening, 111, water eye screw, 112, filter screen, 2, packing element, 3, upper packing element seat, 31, cutting seam, 4, lower packing element seat, 5, extension spring shoulder pad, 51, outer layer pull spring ring, 52, inlayer pull spring ring, 6, adapter sleeve, 7, retaining ring, 8, holding screw, 9, upper joint, 10, sealing member.
Detailed Description
Hereinafter, the expanding packer and tool string of the present utility model will be described in detail in connection with exemplary embodiments.
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the related art, the problems of deformation of a packer rubber, damage of a shoulder of the rubber and the like frequently occur in the field use of the expanding packer used as a packing tool, and the problems of low pressure bearing level, insufficient repeatable setting performance and the like of the whole expanding packer exist under the condition that a single expanding packer is difficult to meet the working condition of 70MPa and more than 5 times of effective repeated setting, so that the performance and the field construction efficiency of the whole tool pipe column are restricted.
Based on the above, the utility model provides an expansion packer and a tool pipe string, wherein the expansion packer can comprise a central pipe, a rubber cylinder seat and a tension spring shoulder pad, wherein the rubber cylinder, the rubber cylinder seat and the rubber cylinder seat can be sleeved on the central pipe, the upper end of the rubber cylinder can be penetrated at the lower end of the rubber cylinder seat and is abutted with a step of the inner wall of the rubber cylinder seat, and the lower end of the rubber cylinder can be penetrated at the upper end of the rubber cylinder seat and is abutted with a step of the inner wall of the rubber cylinder seat; the number of the tension spring shoulder protectors can be at least one, and the tension spring shoulder protectors can be arranged between the lower end of the upper rubber cylinder seat and the step of the outer wall of the rubber cylinder or between the upper end of the lower rubber cylinder seat and the step of the outer wall of the rubber cylinder; the tension spring shoulder pad can be used for supporting the shoulder of the rubber cylinder so as to prevent the shoulder from being partially torn when the rubber cylinder is in setting expansion; the upper rubber cylinder seat and the lower rubber cylinder seat can expand along with expansion and setting of the rubber cylinder so as to protect the rubber cylinder and the tension spring shoulder pad.
The expansion type packer has the design of a double shoulder protection mechanism, can be repeatedly set and unset for many times under the working condition of high temperature and high pressure, for example, the effective repeated setting times can reach more than 10 times under the working condition of high pressure of 80MPa, the high-pressure repeated effective setting of the expansion type packer is realized, the expansion type packer has the advantage of repeated use for many times compared with the common expansion type packer, the problems of low bearing grade, insufficient repeated setting performance and the like of the common expansion type packer are solved, and the on-site production efficiency is improved.
Example embodiment 1
The present exemplary embodiment provides an inflatable packer.
FIG. 1 illustrates an overall block diagram of an inflatable packer according to an exemplary embodiment of the utility model; FIG. 2 illustrates a tension spring shoulder pad schematic in an inflatable packer of an exemplary embodiment of the utility model; FIG. 3 illustrates a cross-sectional view of a packing element seat at a cutting seam in an inflatable packer according to an exemplary embodiment of the utility model.
As shown in fig. 1 to 3, the expanding packer according to the present exemplary embodiment may include a central pipe 1, a packing element 2, an upper packing element seat 3, a lower packing element seat 4, and a tension spring shoulder guard 5, wherein the packing element 2, the upper packing element seat 3, and the lower packing element seat 4 may be all sleeved on the central pipe 1, an upper end of the packing element 2 may be penetratingly provided at a lower end of the upper packing element seat 3 and may abut against a step of an inner wall of the upper packing element seat 3, and a lower end of the packing element 2 may be penetratingly provided at an upper end of the lower packing element seat 4 and may abut against a step of an inner wall of the lower packing element seat 4; the rubber cylinder 2 can be made of rubber material, can expand outwards under the condition that the inside of the rubber cylinder is pressed and expand, and is finally clung to the inner wall of the sleeve, so that the function of plugging a liquid flow channel in the sleeve is realized, and the rubber cylinder can rebound and restore to the original state under the condition that the inside pressure of the rubber cylinder is reduced; the upper rubber cylinder seat 3 and the lower rubber cylinder seat 4 can expand together with the rubber cylinder 2 during expanding and setting, so as to protect the rubber cylinder and the tension spring shoulder pad. However, the present utility model is not limited thereto, and the material of the packing element 2 may be other elastic materials other than rubber, as long as the function of pressure expansion and pressure drop rebound recovery can be achieved, and the present utility model is not limited thereto.
Optionally, two tension spring shoulder protectors 5 are arranged, the two tension spring shoulder protectors 5 are sleeved on the rubber cylinder 2, one of the two tension spring shoulder protectors 5 is positioned between the upper rubber cylinder seat 3 and the rubber cylinder 2 in the axial direction, that is, the upper end of one tension spring shoulder protector 5 is abutted with the lower end of the upper rubber cylinder seat 3, and the lower end is abutted with a step of the outer wall of the rubber cylinder 2; the other of the two tension spring shoulder protectors 5 is positioned between the lower rubber cylinder seat 4 and the rubber cylinder 2 in the axial direction, that is, the lower end of the other tension spring shoulder protector 5 is abutted with the upper end of the lower rubber cylinder seat 4, and the upper end is abutted with the step of the outer wall of the rubber cylinder 2; however, the present utility model is not limited thereto, the number of the tension spring shoulder protectors 5 may be one, and if the number of the tension spring shoulder protectors 5 is one, the installation positions thereof may be between the upper rubber cylinder seat 3 and the rubber cylinder 2, or between the lower rubber cylinder seat 4 and the rubber cylinder 2, which is not particularly limited thereto.
Alternatively, the tension spring shoulder protector 5 may include a multi-layer tension spring ring, specifically, may include an outer layer tension spring ring 51 and an inner layer tension spring ring 52, both the outer layer tension spring ring 51 and the inner layer tension spring ring 52 may be tightly wound together in the circumferential direction, the outer layer tension spring ring 51 may be tightly wound on the inner layer tension spring ring 52, the diameter of the outer layer tension spring ring 51 may be larger than the diameter of the inner layer tension spring ring 52, the outer layer tension spring ring 51 and the inner layer tension spring ring 52 may be vulcanized on the tension spring shoulder protector 5, the hardness of the rubber of the tension spring shoulder protector 5 may be higher than the hardness of the body rubber of the rubber tube 2, the tension spring shoulder protector 5 may serve as a first heavy protection mechanism of the expanding packer, and may be used to support the shoulder of the rubber tube 2, when the rubber tube 2 expands under the action of an inner-outer pressure difference, the tension spring shoulder protector 5 expands together with the rubber tube, forming a circumferential protection support for the shoulder of the rubber tube 2, so as to prevent the shoulder of the rubber tube 2 from being partially torn when expanding during setting; the tension spring shoulder pad 5 can be made of a material with higher temperature resistance than the material of the rubber cylinder 2, that is, the highest temperature resistance of the material of the tension spring shoulder pad 5 is higher than the highest temperature resistance of the material of the rubber cylinder 2; however, the present utility model is not limited thereto, and the tension spring shoulder pad 5 may include a plurality of layers of tension spring rings, such as an intermediate layer tension spring ring, and further may include a plurality of layers of tension spring rings, such as an outer layer and an inner layer tension spring ring; the outer layer spring ring 51 and the inner layer spring ring 52 may be connected by other means than vulcanization, which is not particularly limited by the present utility model.
In this embodiment, the lower end of the upper rubber cylinder seat 3 and the upper end of the lower rubber cylinder seat 4 may be respectively provided with 14 cutting slits 31, each cutting slit 31 may be provided along the axial direction of the upper rubber cylinder seat 3 and the lower rubber cylinder seat 4, and the 14 cutting slits 31 may be distributed on the side walls of the upper rubber cylinder seat 3 and the lower rubber cylinder seat 4 along the circumferential direction of the upper rubber cylinder seat 3 and the lower rubber cylinder seat 4, when the upper rubber cylinder seat 3 and the lower rubber cylinder seat 4 expand due to compression expansion, the width of each cutting slit 31 may be widened, so that the lower end of the upper rubber cylinder seat 3 and the upper end of the lower rubber cylinder seat 4 may be radially outwards expanded, so that the upper rubber cylinder seat 3 and the lower rubber cylinder seat 4 may be sleeved outside the tension spring shoulder 5 and the rubber cylinder 2, and the outer walls of the upper rubber cylinder seat 3 and the lower rubber cylinder seat 4 may be tightly attached to the inner wall of the casing, thereby realizing the setting of the expanding packer as the second heavy protection mechanism of the expanding packer; however, the present utility model is not limited thereto, and the number of the cutting slits 31 formed in the upper and lower rubber tube seats 3 and 4 may be any number as long as the radial expansion function of the upper and lower rubber tube seats 3 and 4 can be achieved.
In this embodiment, the expanding packer may further include a connecting sleeve 6, the connecting sleeve 6 is sleeved on the central tube 1 and is connected with the central tube 1 through a threaded fit, and an upper end of the connecting sleeve 6 is penetrated at a lower end of the lower rubber cylinder seat 4; a sealing element 10 can be arranged between the connecting sleeve 6 and the lower rubber cylinder seat 4, and when the lower rubber cylinder seat 4 moves up and down along the axial direction, the sealing element 10 can keep the sealing between the lower rubber cylinder seat 4 and the connecting sleeve 6; however, the present utility model is not limited thereto, and the connecting sleeve 6 and the central tube 1 may be fixedly connected by other means than screw-fit connection, which is not particularly limited thereto.
In this embodiment, the expanding packer may further include an upper joint 9, where the upper joint 9 may be connected to the central pipe 1 through a screw fit, that is, the upper joint 9 may be connected to an upper end of the central pipe 1, and a lower end of the upper joint 9 is located between the central pipe 1 and the upper rubber seat 3, and the upper joint 9 may also be connected to the upper rubber seat 3 through a screw fit, and a sealing element 10 may also be installed between the upper joint 9 and the upper rubber seat 3, so as to achieve sealing between the upper joint 9 and the upper rubber seat 3; however, the present utility model is not limited thereto, and the connection between the central tube 1, the upper joint 9 and the packing element seat 3 may be other fixed connection manners, such as a bolt connection, besides the screw fitting, which is not particularly limited thereto.
Optionally, the expanding packer may further include a retaining ring 7, the retaining ring 7 may be inserted into the upper joint 9, the lower end of the retaining ring 7 is fixedly connected with the central pipe 1 through threaded fit, a step of an outer wall of the retaining ring 7 abuts against a step of an inner wall of the upper joint 9, and the retaining ring 7 may be used for preventing thread between the upper joint 9 and the central pipe 1 from being disengaged from each other, thereby causing the upper joint 9 and the central pipe 1 to be separated from each other; however, the present utility model is not limited thereto, and the connection between the retaining ring 7 and the central tube 1 may be other fixed connection means other than screw-fitting, and the present utility model is not limited thereto.
Alternatively, the side wall of the central tube 1 may be provided with a side hole 11, a water hole screw 111 and a filter screen 112 may be installed in the side hole 11, the filter screen 112 is installed at the bottom of the side hole 11, the water hole screw 111 is installed in the side hole 11, and the bottom end of the water hole screw 111 compresses the filter screen 112 to prevent the filter screen 112 from moving. The water hole screw 111 is provided with a through water hole, and the water hole is communicated with the inner cavity of the central tube 1 and the inner cavity of the rubber sleeve 2 to form a packer rubber sleeve setting hydraulic channel. The filter screen 112 may filter impurities, such as sand, etc., in the fluid flowing from the inner cavity of the central tube 1 to the inner cavity of the packing element 2, thereby preventing clogging of the setting hydraulic passage of the expanding packer.
Alternatively, a set screw 8 may be installed between the connecting sleeve 6 and the central tube 1, and the set screw 8 may connect the connecting sleeve 6 and the central tube 1 and keep relatively fixed, so that the relative displacement between the connecting sleeve 6 and the central tube 1 may be prevented; however, the present utility model is not limited thereto, and the fixed connection between the connecting sleeve 6 and the center tube 1 may be other connection means, such as bolting or clamping, besides the fastening screw 8, which is not particularly limited thereto.
The operation of the expanding packer according to the present exemplary embodiment is described in detail as follows:
the expanding packer is installed in a tool pipe string and then is put into a sleeve, pressure is suppressed in the expanding packer from the upper direction of the tool pipe string, the pressure enters a water hole on a water hole screw 111 through a side hole 11 on a central pipe 1, the pressure can be applied to the inner wall of the rubber sleeve 2, the rubber sleeve 2 is expanded outwards in the radial direction, in the outward expansion process of the rubber sleeve 2, tension spring shoulder protectors 5 at the upper end and the lower end of the rubber sleeve 2 serve as a first heavy protection mechanism, the shoulders of the rubber sleeve 2 can be supported, local tearing of the shoulders of the rubber sleeve 2 due to over expansion is prevented, meanwhile, a lower rubber sleeve seat 4 can be moved upwards in the axial direction, cutting joints on an upper rubber sleeve seat 3 and a lower rubber sleeve seat 4 can be opened in the radial direction, the tension spring shoulder protectors 5 and the rubber sleeve 2 are sleeved until the outer walls of the upper rubber sleeve seat 3 and the lower rubber sleeve seat 4 are tightly attached to the inner wall of the sleeve, the tension spring shoulder protectors 5 are prevented from being extruded into annular gaps between the upper rubber sleeve seat and the lower rubber sleeve seat and the sleeve, and the elastic ring of the tension spring shoulder protectors 5 can fully form a circular sleeve supporting mechanism with 360 degrees to complete the whole sealing process of the upper sleeve seat and the lower sleeve seat 4.
When the expansion type packer is required to be unsealed after setting is completed, firstly, the pressure in the expansion type packer is relieved, after the pressure is reduced, the rubber cylinder 2 rebounds to be restored to the original state under the elastic action of the self material, the lower rubber cylinder seat 4 is reset to descend, the cutting seam is contracted along the radial direction and leaves the outer surfaces of the tension spring shoulder protector 5 and the rubber cylinder 2, the tension spring shoulder protector 5, the upper rubber cylinder seat 3 and the lower rubber cylinder seat 4 can restore to the original shape together with the rubber cylinder 2, and the packer is unsealed.
Example embodiment 2
The present exemplary embodiment provides a tool string.
The tool string described in the present exemplary embodiment may include an expanding packer as described in exemplary embodiment 1, and in addition, the tool string described in the present exemplary embodiment may further include other types of downhole tools, such as a hydraulic injector, a locator, a safety joint, etc., connected to the lower end and/or the upper end of the expanding packer, and the present utility model is not limited thereto, and various types of downhole tools may be combined to form the tool string described in the present exemplary embodiment to perform different types of operations downhole.
In summary, the expansion type packer has the design of the double shoulder protection mechanism, can be repeatedly set and unset for many times under the working condition of high temperature and high pressure, for example, the effective repeated setting times can reach more than 10 times under the working condition of high pressure of 80MPa, the high-pressure repeated effective setting of the expansion type packer is realized, the expansion type packer has the advantage of repeated use for many times compared with the common expansion type packer, the problems of low pressure bearing grade, insufficient repeated setting performance and the like of the common expansion type packer are solved, and the on-site production efficiency is improved.
Although the present utility model has been described above with reference to the exemplary embodiments and the accompanying drawings, it should be apparent to those of ordinary skill in the art that various modifications can be made to the above-described embodiments without departing from the spirit and scope of the claims.
Claims (10)
1. An expansion packer is characterized by comprising a central tube, a rubber cylinder, an upper rubber cylinder seat, a lower rubber cylinder seat and a tension spring shoulder pad, wherein,
the upper end of the rubber cylinder is arranged at the upper end of the lower rubber cylinder seat in a penetrating way and is in butt joint with the step of the inner wall of the upper rubber cylinder seat;
the number of the tension spring shoulder protectors is at least one, and the tension spring shoulder protectors are arranged between the lower end of the upper rubber cylinder seat and the step of the outer wall of the rubber cylinder or between the upper end of the lower rubber cylinder seat and the step of the outer wall of the rubber cylinder; the tension spring shoulder pad is used for supporting the shoulder of the rubber cylinder so as to prevent the shoulder from being partially torn when the rubber cylinder is in setting expansion;
the upper rubber cylinder seat and the lower rubber cylinder seat can expand along with expansion and setting of the rubber cylinder so as to protect the rubber cylinder and the tension spring shoulder pad.
2. The expanding packer of claim 1, wherein the number of the tension spring shoulder protectors is two, and the two tension spring shoulder protectors are respectively arranged between the lower end of the upper rubber cylinder seat and the step of the outer wall of the rubber cylinder and between the upper end of the lower rubber cylinder seat and the step of the outer wall of the rubber cylinder;
the tension spring shoulder pad comprises a plurality of layers of tension spring rings, the diameter of the outer layer of tension spring rings is larger than that of the inner layer of tension spring rings, and the plurality of layers of tension spring rings are tightly wound along the circumferential direction.
3. The expandable packer of claim 1, wherein the lower end of the upper rubber cylinder seat and the upper end of the lower rubber cylinder seat are provided with a plurality of cutting slits along the axial direction, the plurality of cutting slits are distributed along the circumferential directions of the upper rubber cylinder seat and the lower rubber cylinder seat respectively, and when the upper rubber cylinder seat and the lower rubber cylinder seat are expanded, the plurality of cutting slits can expand to enable the upper rubber cylinder seat and the lower rubber cylinder seat to expand and be tightly attached to the inner wall of the sleeve.
4. The expanding packer according to claim 1, further comprising a connecting sleeve, wherein the connecting sleeve is sleeved outside the central tube, and the upper end of the connecting sleeve is penetrated at the lower end of the lower rubber cylinder seat; and a sealing element is arranged between the connecting sleeve and the lower rubber cylinder seat and used for keeping a sealing state between the connecting sleeve and the lower rubber cylinder seat when the lower rubber cylinder seat moves up and down along the axial direction.
5. The expanding packer of claim 1, further comprising an upper joint fixedly connected to an upper end of the central tube, a lower end of the upper joint being located between the central tube and the upper packing element seat, and a sealing member being installed between the upper joint and the upper packing element seat for sealing between the upper joint and the upper packing element seat.
6. The expandable packer of claim 5, further comprising a retaining ring disposed in the upper joint, wherein a lower end of the retaining ring is fixedly connected to the center tube, wherein a step of an outer wall of the retaining ring abuts against a step of an inner wall of the upper joint, and the retaining ring is configured to prevent separation between the upper joint and the center tube.
7. The expanding packer of claim 1, wherein a side hole is formed in the side wall of the central tube, a water hole screw and a filter screen are arranged in the side hole, and a through water hole is formed in the water hole screw and can be communicated with the inner cavity of the central tube; the filter screen can filter impurities in the liquid, and prevent the liquid flow channel of the expansion packer from being blocked.
8. The expandable packer of claim 4, wherein a set screw is mounted between the connection sleeve and the center tube, the set screw being capable of preventing relative displacement between the connection sleeve and the center tube.
9. The expandable packer of claim 1, wherein a highest temperature resistance of the tension spring shoulder pad is greater than a highest temperature resistance of the packing element.
10. A tool string comprising an inflatable packer according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321292425.5U CN220015120U (en) | 2023-05-25 | 2023-05-25 | Expansion packer and tool pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321292425.5U CN220015120U (en) | 2023-05-25 | 2023-05-25 | Expansion packer and tool pipe string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220015120U true CN220015120U (en) | 2023-11-14 |
Family
ID=88672199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321292425.5U Active CN220015120U (en) | 2023-05-25 | 2023-05-25 | Expansion packer and tool pipe string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220015120U (en) |
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2023
- 2023-05-25 CN CN202321292425.5U patent/CN220015120U/en active Active
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