Pressure relief device of packer

Abstract

The invention belongs to the technical field of packers for oil exploitation tunneling, and provides a packer pressure relief device. The packer pressure relief device comprises a main pipe part, a pressure relief valve part and a pressure relief valve part, one end of the main pipe part can extend into a packer and is close to a sealing ring of the packer; the main pipe part comprises an outer mounting main pipe and an inner breather pipe; the driving guide part comprises at least one guide piece and at least one driving assembly, and the control part is arranged on the main pipe part; the control part comprises a deformation air bag, a deformation support net and at least one electromagnetic strip, and the deformation air bag achieves expansion deformation on an external air source and drives the deformation support net to abut against the packer. And after being electrified with an external power supply, the electromagnetic strip is magnetically connected with the sealing ring and drives the sealing ring to move on the packer. According to the device, pressure relief is achieved through magnetic control.

Description

Technical Field

[0001] The invention relates to the technical field of packer pressure relief in oil exploitation and excavation, and in particular to a packer pressure relief device. Background Art

[0002] The packer can isolate different oil layers, gas layers or water layers in the well to prevent them from mixing with each other, thereby ensuring the production and quality of each layer. This separation effect helps to maintain the pressure stability of the oil and gas layers, prevent fluid migration, and improve production efficiency; However, in actual use, pressure relief is often required. Usually, the pressure relief is achieved by changing the sealing spacing of the sealing ring on the packer through human power or external mechanical force. This method requires unified adjustment of relevant components on the packer. At the same time, frequent operation of external forces such as human power will also reduce the sealing performance of the sealing ring.

[0003] Therefore, we propose a convenient and reliable pressure relief device to achieve pressure relief through magnetic control. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a packer pressure relief device to facilitate pressure relief.

[0005] The present invention provides a pressure relief device for a packer, comprising: a main pipe part, one end of which can extend into the packer and be close to the sealing ring of the packer; the main pipe part comprises an external mounting main pipe and an internal ventilation pipe; the external mounting main pipe is arranged outside the internal ventilation pipe; one end of the internal ventilation pipe is provided with a mounting port; the external mounting main pipe is provided with a feed section at one end away from the mounting port; the other end of the internal ventilation pipe is communicated with an external air source; a driving guide part, the driving guide part comprises at least one guide member and a driving assembly, the guide member is installed on the outer wall of the external mounting main pipe and abuts against the inner wall of the packer; the driving guide part comprises a driving guide member, a driving ... The component is drivingly connected to the feed section of the externally mounted main pipe; and a control unit, which is arranged on the main pipe; the control unit includes a deformable airbag, a deformable support net and at least one electromagnetic strip, the inflation port of the deformable airbag is connected to the installation port of the internal ventilation pipe; the deformable support net is installed on the deformable airbag, and the electromagnetic strip is installed on the deformable support net; the electromagnetic strip is electrically connected to an external power supply; the deformable airbag is expanded and deformed by an external air source, and drives the deformable support net to approach the packer; wherein after the electromagnetic strip is energized by the external power supply, it is magnetically connected to the sealing ring and drives the sealing ring to move on the packer.

[0006] Furthermore, it also includes a pressure relief valve, which is installed on the packer and used for pressure relief. In actual use, the pressure relief valve is installed at the outer pipe port of the packer. When the sealing ring is no longer sealed, the pressure relief valve can be directly opened. In this way, there is no need to directly use external force to separate the sealing ring as before; in this way, the impact on the packer components is greatly reduced.

[0007] Furthermore, the inner ventilation pipe passes through the outer mounting main pipe and is rotatably connected to the outer mounting main pipe through a bearing. In actual use, the main function of this design is to prevent the control unit from being affected during operation.

[0008] Furthermore, the guide members are provided at multiple locations and are arranged along the axis direction of the outer mounting main pipe. In actual use, the purpose of this design is to ensure the stability of the outer mounting main pipe and avoid axial shaking.

[0009] Furthermore, the guide member includes a guide main sleeve, a guide sliding sleeve and an abutment fixing mechanism; the guide sliding sleeve is installed in the guide main sleeve and slidably installed on the outer wall of the outer mounting main pipe; the abutment inner fixing mechanism is installed on the guide main sleeve and abuts and fixes with the outer wall of the outer mounting main pipe and the inner wall of the packer pipe respectively. In actual use, the purpose of this design is to achieve the abutment, fixation or separation of the outer mounting main pipe and the packer; in this way, the rotation and linear axial reciprocating motion can be effectively guaranteed.

[0010] Furthermore, the guide sleeve includes a mounting sleeve and at least one ball; the mounting sleeve is provided with at least one mounting hole, the ball is rotatably mounted in the mounting hole, wherein the ball abuts against the outer wall of the outer mounting main pipe; the mounting sleeve is mounted in the guide main sleeve. In actual use, the purpose of this design is to realize the movement of the guide member on the outer mounting main pipe, and through the rolling of the ball, the guide sleeve effectively supports the rotation and linear reciprocating motion, and effectively ensures stability.

[0011] Furthermore, the guide main sleeve is provided with at least one abutment slideway and at least one installation cavity, which are arranged at both ends of the guide main sleeve and are evenly distributed in the radial direction; the abutment fixing mechanism is provided in multiple locations and is installed one by one in the installation cavity. In actual use, the purpose of this design is to facilitate more comprehensive fixation; in this way, the force is more uniform and stability can be better guaranteed.

[0012] Furthermore, the abutment fixing mechanism includes an abutment reciprocating sliding shaft and an abutment motor; the abutment motor is installed in the installation cavity, and the abutment reciprocating sliding shaft is slidably installed in the abutment slideway; wherein the abutment motor is transmission-connected to the abutment reciprocating sliding shaft. In actual use, the purpose of this design is to realize the reciprocating motion of the abutment reciprocating sliding shaft, and then realize the two-way abutment of the front and rear sections, wherein the abutment slideway is provided with a closing cover at the road opening to prevent the abutment reciprocating sliding shaft from escaping from the slideway.

[0013] Furthermore, the abutting reciprocating sliding shaft is provided with a rack section, a gear is installed on the rotating shaft of the abutting motor, and the rack section meshes with the gear for transmission. In actual use, the purpose of this design is to achieve the reciprocating motion of the abutting reciprocating sliding shaft through the positive and negative rotation of the abutting motor, so that the abutting fixation can be achieved; the bidirectional fixation of a component is achieved, and the components are reduced; making the device structure more compact and reasonable.

[0014] Furthermore, the drive assembly also includes a screw spiral swivel, a drive motor and a transmission belt assembly, wherein the screw spiral swivel is rotatably mounted on the feed section, and the drive motor is mounted on the outside of the screw spiral swivel; one end of the transmission belt assembly is transmission-connected to the drive motor, and the other end of the transmission belt assembly is transmission-connected to the feed section. In actual use, the screw spiral swivel used in this design is to cooperate with the feed section, wherein the feed section is also a screw, similar to the design of the screw. Not only that, the transmission belt assembly of this design is also a belt and a pulley, which is a conventional design and will not be described here; wherein, the purpose of this design is to drive the transmission of the transmission belt assembly to maintain the rotation of the feed section, thereby realizing up and down reciprocating motion, but the distance is limited; at the same time, due to the flexible characteristics of the transmission belt assembly, it is further realized that when the feed section reciprocates up and down, the transmission will not be blocked and fail.

[0015] It can be seen from the above technical solution that the packer pressure relief device provided by the present invention has the following beneficial effects: (1) In actual use, the purpose of this design is to replace traditional human or external mechanical force with magnetic force, and to achieve the movement of the sealing ring on the packer through magnetic internal drive, thereby achieving the pressure relief effect.

[0016] (2) Among them, the components of the externally mounted main pipe are effectively placed into the packer through the main pipe part, thus reducing the modification of the existing packer and greatly improving convenience and practicality; (3) The control unit used realizes the magnetic connection between the electromagnetic strip and the sealing ring, and the electromagnetic strip and the sealing ring are moved closer or farther away by the deformation of the airbag. In this way, the movement of the sealing ring on the packer is effectively realized, and pressure relief can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention, the following will briefly introduce the drawings required for the specific embodiments or the prior art description. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0018] Figure 1 This is the front view of the original packer; Figure 2 A schematic diagram of the installation structure of a packer pressure relief device in a packer provided by an embodiment of the present invention; Figure 3 for Figure 2 The cross-sectional structure diagram of AA shown; Figure 4 for Figure 2 The enlarged structural diagram of point B shown; Reference numerals: Main pipe part 1, external installation main pipe 11, internal ventilation pipe 12, installation port 121, feed section 111, drive guide part 2, guide member 21, guide main sleeve 211, guide sleeve 212, abutment fixing mechanism 213, installation sleeve 2121, ball 2122, installation hole 2100, abutment slideway 2111, installation cavity 2112, abutment reciprocating slide shaft 2131, abutment motor 2132, rack section 220, drive assembly 22, screw spiral swivel seat 221, drive motor 222, transmission belt assembly 223, control part 3, deformation airbag 31, deformation support net 32, electromagnetic strip 33, pressure relief valve 4, sealing ring 500, and packer 600. DETAILED DESCRIPTION

[0019] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0020] The embodiment is basically as shown in the attached Figures 1 to 4 As shown: like Figure 1 - Figure 4 As shown, a packer pressure relief device provided in this embodiment can conveniently achieve pressure relief.

[0021] The present invention provides a pressure relief device for a packer, comprising: a main pipe part 1, one end of which can extend into the packer 600 and be close to the sealing ring 500 of the packer 600; the main pipe part 1 comprises an external mounting main pipe 11 and an internal ventilation pipe 12; the external mounting main pipe 11 is arranged outside the internal ventilation pipe 12; one end of the internal ventilation pipe 12 is provided with a mounting port 121; the external mounting main pipe 11 is provided with a feed section 111 at one end away from the mounting port 121; the other end of the internal ventilation pipe 12 is communicated with an external air source; a driving guide part 2, the driving guide part 2 comprises at least one guide member 21 and a driving assembly 22, the guide member 21 is installed on the outer wall of the external mounting main pipe 11 and abuts against the inner wall of the packer 600; the driving assembly 22 is transmission-connected to the feed section 111 of the externally mounted main pipe 11; and a control unit 3, the control unit 3 is arranged on the main pipe unit 1; the control unit 3 includes a deformable airbag 31, a deformable support net 32 ​​and at least one electromagnetic strip 33, the inflation port of the deformable airbag 31 is communicated with the installation port 121 of the internal ventilation pipe 12; the deformable support net 32 ​​is installed on the deformable airbag 31, and the electromagnetic strip 33 is installed on the deformable support net 32; the electromagnetic strip 33 is electrically connected to an external power source; the deformable airbag 31 is expanded and deformed by an external gas source, and drives the deformable support net 32 ​​to approach the packer 600; wherein the electromagnetic strip 33 is magnetically connected to the sealing ring 500 after being energized by the external power source, and drives the sealing ring 500 to move on the packer 600. In actual use, the purpose of this design is to replace traditional manpower or external mechanical force with magnetic force, and to achieve the movement of the sealing ring 500 on the packer 600 through magnetic internal drive, thereby achieving the pressure relief effect. Among them, through the main pipe part 1, the components of the external mounting main pipe 11 are effectively placed in the packer 600, so that the modification of the existing packer 600 is reduced, which is greatly convenient and practical; and the control part 3 used realizes the magnetic connection between the electromagnetic strip 33 and the sealing ring 500, and the electromagnetic strip 33 and the sealing ring 500 are moved closer or farther away through the deformable airbag 31, so that the movement of the sealing ring 500 on the packer 600 is effectively realized; and pressure relief can be achieved.

[0022] In this embodiment, a pressure relief valve 4 is also included, which is installed on the packer 600 and used for pressure relief. In actual use, the pressure relief valve 4 is installed at the outer pipe opening of the packer 600. When the sealing ring 500 is no longer sealed, the pressure relief valve 4 can be directly opened. In this way, there is no need to directly use external force to separate the sealing ring 500 as before; in this way, the impact on the components of the packer 600 is greatly reduced.

[0023] In this embodiment, the inner ventilation pipe 12 passes through the outer mounting main pipe 11 and is rotatably connected to the outer mounting main pipe 11 via a bearing. In actual use, the main function of this design is to prevent the control unit 3 from being affected during operation.

[0024] In this embodiment, the guide members 21 are provided at multiple locations and are arranged along the axial direction of the outer mounting main pipe 11. In actual use, the purpose of this design is to ensure the stability of the outer mounting main pipe 11 and avoid axial shaking.

[0025] In this embodiment, the guide member 21 includes a guide main sleeve 211, a guide sleeve 212 and an abutting fixing mechanism 213; the guide sleeve 212 is installed in the guide main sleeve 211 and is slidably installed on the outer wall of the outer installation main pipe 11; the abutting inner fixing mechanism is installed on the guide main sleeve 211 and is abutted and fixed with the outer wall of the outer installation main pipe 11 and the inner wall of the packer 600. In actual use, the purpose of this design is to achieve the abutting fixation or separation of the outer installation main pipe 11 and the packer 600; in this way, the rotation and linear axial reciprocating motion can be effectively guaranteed.

[0026] In this embodiment, the guide sleeve 212 includes a mounting sleeve 2121 and at least one ball 2122; the mounting sleeve 2121 is provided with at least one mounting hole 2100, and the ball 2122 is rotatably mounted in the mounting hole 2100, wherein the ball 2122 abuts against the outer wall of the outer mounting main pipe 11; the mounting sleeve 2121 is mounted in the guide main sleeve 211. In actual use, the purpose of this design is to realize the movement of the guide member 21 on the outer mounting main pipe 11, and through the rolling of the ball 2122, the guide sleeve 212 effectively supports the rotation and linear reciprocating motion, and effectively ensures stability.

[0027] In this embodiment, the guide main sleeve 211 is provided with at least one abutting slideway 2111 and at least one mounting cavity 2112, which are arranged at both ends of the guide main sleeve 211 and are evenly distributed in the radial direction; the abutting fixing mechanism 213 is provided in multiple locations and is installed one by one in the mounting cavity 2112. In actual use, the purpose of this design is to facilitate more comprehensive fixation; in this way, the force is more uniform and the stability can be better guaranteed.

[0028] In this embodiment, the abutment fixing mechanism 213 includes an abutment reciprocating sliding shaft 2131 and an abutment motor 2132; the abutment motor 2132 is installed in the installation cavity 2112, and the abutment reciprocating sliding shaft 2131 is slidably installed in the abutment slideway 2111; wherein the abutment motor 2132 is in transmission connection with the abutment reciprocating sliding shaft 2131. In actual use, the purpose of this design is to realize the reciprocating motion of the abutment reciprocating sliding shaft 2131, and then realize the two-way abutment of the front and rear sections, wherein the abutment slideway 2111 is provided with a closing cover at the road entrance to prevent the abutment reciprocating sliding shaft 2131 from escaping from the slideway.

[0029] In this embodiment, the abutting reciprocating sliding shaft 2131 is provided with a rack section 220, and a gear is installed on the rotating shaft of the abutting motor 2132, and the rack section 220 is meshed with the gear for transmission. In actual use, the purpose of this design is to achieve the reciprocating motion of the abutting reciprocating sliding shaft 2131 through the positive and negative rotation of the abutting motor 2132, so that the abutting fixation can be achieved; the bidirectional fixation of a component is achieved, and the components are reduced; making the device structure more compact and reasonable.

[0030] In this embodiment, the driving assembly 22 also includes a screw spiral seat 221, a driving motor 222 and a transmission belt assembly 223. The screw spiral seat 221 is rotatably mounted on the feed section 111, and the driving motor 222 is mounted on the outside of the screw spiral seat 221; one end of the transmission belt assembly 223 is transmission-connected to the driving motor 222, and the other end of the transmission belt assembly 223 is transmission-connected to the feed section 111. In actual application, the screw spiral swivel 221 used in this design is to cooperate with the feed section 111, wherein the feed section 111 is also a screw, similar to the design of the screw. Not only that, the transmission belt assembly 223 of this design, that is, the belt and pulley, is a conventional design and will not be elaborated here. Among them, the purpose of this design is to maintain the rotation of the feed section 111 through the transmission of the transmission belt assembly 223, thereby realizing up and down reciprocating motion, but the distance is limited. At the same time, due to the flexible characteristics of the transmission belt assembly 223, it is further realized that when the feed section 111 reciprocates up and down, the transmission will not be blocked and fail.

[0031] To sum up, this kind of packer pressure relief device is not only reasonably designed but also easy to operate. It can effectively achieve the sealing effect of the control sealing ring 500 from the inside to the outside, avoiding the operation of pressure relief due to external force or external mechanical force of the traditional packer 600; the device effectively improves the service life of the packer 600, and is therefore suitable for industry promotion.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A packer pressure relief device, characterized in that: include: A main pipe part, one end of which can extend into the packer and be close to the sealing ring of the packer; the main pipe part includes an external installation main pipe and an internal ventilation pipe; the external installation main pipe is arranged outside the internal ventilation pipe; one end of the internal ventilation pipe is provided with a mounting port; the external installation main pipe is provided with a feed section at one end away from the mounting port; the other end of the internal ventilation pipe is communicated with an external air source; A driving guide portion, the driving guide portion comprising at least one guide member and a driving assembly, the guide member being mounted on the outer wall of the outer mounting main pipe and abutting against the inner wall of the packer; the driving assembly being drivingly connected to the feed section of the outer mounting main pipe; and A control unit, the control unit is arranged on the main pipe unit; the control unit includes a deformable airbag, a deformable support net and at least one electromagnetic strip, the inflation port of the deformable airbag is connected to the installation port of the inner ventilation pipe; the deformable support net is installed on the deformable airbag, and the electromagnetic strip is installed on the deformable support net; the electromagnetic strip is electrically connected to an external power supply; The deformable airbag is expanded and deformed by an external gas source, and drives the deformable support net to approach the packer; wherein the electromagnetic strip is magnetically connected to the sealing ring after being energized by the external power source, and drives the sealing ring to move on the packer.

2. A packer pressure relief device according to claim 1, characterized in that: Also included is a pressure relief valve, which is installed on the packer and is used for pressure relief.

3. A packer pressure relief device according to claim 1, characterized in that: The inner ventilation pipe passes through the outer mounting main pipe and is rotatably connected to the outer mounting main pipe through a bearing.

4. A packer pressure relief device according to claim 1, characterized in that: The guide members are provided at multiple locations and are arranged along the axial direction of the outer mounting main pipe.

5. A packer pressure relief device according to claim 1, characterized in that: The guide member includes a guide main sleeve, a guide sliding sleeve and abutment fixing mechanism; the guide sliding sleeve is installed in the guide main sleeve and is slidably installed on the outer wall of the external installation main pipe; the abutment inner fixing mechanism is installed on the guide main sleeve and is abutted and fixed with the outer wall of the external installation main pipe and the inner wall of the pipe of the packer respectively.

6. A packer pressure relief device according to claim 5, characterized in that: The guide sleeve includes a mounting sleeve and at least one ball; the mounting sleeve is provided with at least one mounting hole, and the ball is rotatably mounted in the mounting hole, wherein the ball abuts against the outer wall of the outer mounting main pipe; the mounting sleeve is mounted in the guide main sleeve.

7. A packer pressure relief device according to claim 5, characterized in that: The guide main sleeve is provided with at least one abutment slideway and at least one installation cavity, which are arranged at both ends of the guide main sleeve and evenly distributed along the radial direction; the abutment fixing mechanism is provided in multiple locations and is installed one by one in the installation cavity.

8. A packer pressure relief device according to claim 7, characterized in that: The abutment fixing mechanism comprises an abutment reciprocating sliding shaft and an abutment motor; the abutment motor is installed in the installation cavity, and the abutment reciprocating sliding shaft is slidably installed in the abutment slideway; wherein the abutment motor is transmission-connected to the abutment reciprocating sliding shaft.

9. A packer pressure relief device according to claim 8, characterized in that: The abutting reciprocating sliding shaft is provided with a rack section, a gear is installed on the rotating shaft of the abutting motor, and the rack section is meshed with the gear for transmission.

10. A packer pressure relief device according to claim 1, characterized in that: The driving assembly also includes a screw spiral seat, a driving motor and a transmission belt assembly. The screw spiral seat is rotatably mounted on the feed section, and the driving motor is mounted on the outside of the screw spiral seat; one end of the transmission belt assembly is transmission-connected to the driving motor, and the other end of the transmission belt assembly is transmission-connected to the feed section.

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