Cable-passing oil extraction packer

Abstract

The utility model relates to the technical field of oil production well testing, in particular to a cable-passing oil production packer. Comprising an upper connector, a center pipe, a side rubber barrel, a middle rubber barrel, a rubber barrel center pipe, a pressure bearing sleeve, an upper connecting body, an outer barrel, a lower connector, a guide body, a cable passing liner tube assembly, an upper pressure bearing sleeve, a setting shear pin, a piston, a setting cylinder barrel, a locking ring seat, an unsetting shear pin, a locking ring body and a lower connecting body. When the pressure reaches a peak value, the setting shear pin is sheared off, under hydraulic pushing, the whole setting continuously moves upwards, the rubber sleeves on the two sides, the middle rubber sleeve and the closed oil sleeve annulus are compressed, the locking ring and the locking ring base enter an engaged locking state after pressure relief, setting of the packer is completed, during unsetting, a pipe column is lifted upwards, the upper connector drives the central pipe and other components to move upwards, the unsetting shear pin is sheared off, and the packer is unset. And the locking ring and the locking ring seat are not locked, the sealing piece rebounds, and the packer is unblocked.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production well testing, in particular to a cable-conveyed oil production packer. Background Art

[0002] In the testing operation of oil production wells, it is often necessary to use an oil production packer. The packer can effectively shorten the operation time. Especially when creating and isolating formation layers in open-hole completion, its fast response ability significantly improves the operation efficiency.

[0003] However, according to the detection requirements of different layers in the oil production well, it is also necessary to lower a cable into the well. The setting of the packer in the casing causes the cable to be unable to pass through. This requires the cable to be pre-passed through the internal structure of the packer. Most of the existing cable packers are eccentric, which is not conducive to the lowering of subsequent tools and is inconvenient to use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cable-conveyed oil production packer, aiming to solve the technical problem in the prior art that according to the detection requirements of different layers in the oil production well, it is also necessary to lower a cable into the well. The setting of the packer in the casing causes the cable to be unable to pass through. This requires the cable to be pre-passed through the internal structure of the packer. Most of the existing cable packers are eccentric, which is not conducive to the lowering of subsequent tools and is inconvenient to use.

[0005] To achieve the above purpose, a cable-conveyed oil production packer adopted by the utility model includes an upper joint, a central tube, side rubber cylinders, middle rubber cylinders, a rubber cylinder central tube, a pressure-bearing sleeve, an upper connecting body, an outer cylinder and a lower joint. One end of the upper joint is provided with a guide body and a cable-conveyed liner assembly, and the cable-conveyed liner assembly is located on the guide body. One end of the central tube is provided with an upper pressure-bearing sleeve. One end of the upper connecting body is provided with a setting shear pin. A piston is arranged on the outer side of the upper connecting body. A setting cylinder is arranged in the outer cylinder. A lock ring seat and a releasing shear pin are arranged in the setting cylinder. A lock ring body is arranged on the lock ring seat. One end of the outer cylinder is provided with a lower connecting body. The central tube is arranged at one end of the upper joint. The side rubber cylinders are arranged at one end of the central tube. The middle rubber cylinders are arranged at one end of the central tube. The rubber cylinder central tube is arranged at one end of the middle rubber cylinders. The pressure-bearing sleeve is arranged at one end of the rubber cylinder central tube. The upper connecting body is arranged at one end of the pressure-bearing sleeve. The outer cylinder is arranged at one end of the upper connecting body. The lower joint is arranged at one end of the outer cylinder.

[0006] Wherein, the upper pressure-bearing sleeve is located below the guide body and is communicated with the guide body.

[0007] Wherein, the lower connecting body is located inside the lower joint, and the lower connecting body communicates with the lower joint.

[0008] Wherein, the cable - passing oil - sealed packer further includes a first spacer ring and a second spacer ring. The first spacer ring is arranged at the connection between the side rubber cylinder and the middle rubber cylinder, and the second spacer ring is arranged at the connection between the middle rubber cylinder and the rubber cylinder central tube.

[0009] Wherein, a taper - end set screw and a fixing screw are arranged between the outer cylinder and the lower joint. The taper - end set screw is located at the lower joint, and the fixing screw is located at the outer cylinder.

[0010] Wherein, the cable - passing liner assembly penetrates through the central tube, the side rubber cylinder, the middle rubber cylinder, the rubber cylinder central tube, the pressure - bearing sleeve, the upper connecting body and the outer cylinder, and communicates with one end of the lower joint.

[0011] Wherein, a first O - ring is arranged at the connection between the upper pressure - bearing sleeve and the upper joint, a second O - ring is arranged at the connection between the side rubber cylinder and the central tube, third and fourth O - rings are arranged at the connection between the upper connecting body and the piston, a fifth O - ring is arranged between the cable - passing liner assembly and the upper connecting body, and a sixth O - ring is arranged at the connection between the outer cylinder and the upper connecting body.

[0012] A cable - passing oil - sealed packer of the present utility model includes an upper joint, a central tube, a side rubber cylinder, a middle rubber cylinder, a rubber cylinder central tube, a pressure - bearing sleeve, an upper connecting body, an outer cylinder, a lower joint, a guide body, a cable - passing liner assembly, an upper pressure - bearing sleeve, a setting shear pin, a piston, a setting cylinder, a lock ring seat, a releasing shear pin, a lock ring body and a lower connecting body. During setting, after lowering the packer to the designed position, hydraulic pressure is applied into the tubing. The hydraulic pressure passes through the hydraulic hole of the central tube, pushes the piston to move upward, and simultaneously drives the setting cylinder to move upward. When the pressure reaches a certain value, the setting shear pin is cut off. Under the hydraulic drive, the whole setting part continues to move upward, compresses the two side rubber cylinders, the middle rubber cylinder and seals the oil - casing annulus. After pressure relief, the lock ring and the lock ring seat enter the biting and locking state to prevent the two side rubber cylinders and the middle rubber cylinder from rebounding, thus completing the setting of the packer. During releasing, when the tubing string is lifted, the upper joint drives components such as the central tube to move upward. Due to the friction between the sealing rubber cylinder and the casing, they remain stationary. The releasing shear pin is cut off, the lock ring and the lock ring seat lose the locking, and the sealing parts rebound, and the packer is released. Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 It is a schematic internal structure diagram of the cable-through oil production packer of the present invention.

[0015] 1 - Upper joint, 2 - Guide body, 3 - Cable-through liner assembly, 4 - First O-ring, 5 - Upper pressure-bearing sleeve, 6 - Central tube, 7 - Second O-ring, 8 - Side rubber cylinder, 9 - First spacer ring, 10 - Middle rubber cylinder, 11 - Rubber cylinder central tube, 12 - Pressure-bearing sleeve, 13 - Upper connecting body, 14 - Third O-ring, 15 - Piston, 16 - Fourth O-ring, 17 - Fifth O-ring, 18 - Sixth O-ring, 19 - Outer cylinder, 20 - Setting cylinder, 21 - Lower connecting body, 22 - Lower joint, 23 - Taper-end set screw, 24 - Fixing screw, 25 - Lock ring seat, 26 - Lock ring body, 27 - Unsetting shear pin, 28 - Setting shear pin, 29 - Second spacer ring. Detailed implementation manners

[0016] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as a limitation to the present invention.

[0017] Please refer to Figure 1, the present utility model provides a cable - passing oil - sealing packer, which includes an upper joint 1, a central tube 6, side rubber cylinders 8, a middle rubber cylinder 10, a rubber - cylinder central tube 11, a pressure - bearing sleeve 12, an upper connecting body 13, an outer cylinder 19 and a lower joint 22. One end of the upper joint 1 is provided with a guide body 2 and a cable - passing liner assembly 3, and the cable - passing liner assembly 3 is located on the guide body 2. One end of the central tube 6 is provided with an upper pressure - bearing sleeve 5. One end of the upper connecting body 13 is provided with a setting shear pin 28. A piston 15 is arranged outside the upper connecting body 13. A setting cylinder 20 is arranged inside the outer cylinder 19. A lock - ring seat 25 and a releasing shear pin 27 are arranged inside the setting cylinder 20. A lock - ring body 26 is arranged on the lock - ring seat 25. One end of the outer cylinder 19 is provided with a lower connecting body 21. The central tube 6 is arranged at one end of the upper joint 1. The side rubber cylinders 8 are arranged at one end of the central tube 6. The middle rubber cylinder 10 is arranged at one end of the central tube 6. The rubber - cylinder central tube 11 is arranged at one end of the middle rubber cylinder 10. The pressure - bearing sleeve 12 is arranged at one end of the rubber - cylinder central tube 11. The upper connecting body 13 is arranged at one end of the pressure - bearing sleeve 12. The outer cylinder 19 is arranged at one end of the upper connecting body 13. The lower joint 22 is arranged at one end of the outer cylinder 19.

[0018] In this embodiment, during setting, after the packer is lowered to the designed position, hydraulic pressure is applied into the tubing. The hydraulic pressure passes through the hydraulic holes of the central tube 6, pushing the piston 15 upward, and at the same time driving the setting cylinder 20 to move upward. When the pressure reaches a certain value, the setting shear pin is cut off. Under the hydraulic drive, the whole setting part continues to move upward and compresses the two side rubber cylinders 8, the middle rubber cylinder 10 and seals the oil - casing annulus. After the pressure is relieved, the lock - ring and the lock - ring seat 25 enter the biting and locking state, preventing the two side rubber cylinders 8 and the middle rubber cylinder 10 from rebounding, and completing the setting of the packer. During releasing, when the tubing string is lifted, the upper joint 1 drives components such as the central tube 6 to move upward. Due to the friction between the sealing rubber cylinders and the casing, they remain stationary. The releasing shear pin 27 is cut off, the lock - ring and the lock - ring seat 25 lose the locking, and the sealing parts rebound, releasing the packer.

[0019] Further, the upper pressure - bearing sleeve 5 is located below the guide body 2, and the upper pressure - bearing sleeve 5 communicates with the guide body 2.

[0020] In this embodiment, through the design of the above - mentioned structure, the structural stability of the whole packer can be enhanced; this design enables the pressure - bearing sleeve 12 and the guide body 2 to form an integral body, jointly bearing the pressure from the wellbore, thereby improving the pressure - resistance ability and stability of the packer.

[0021] Further, the lower connecting body 21 is located inside the lower joint 22, and the lower connecting body 21 communicates with the lower joint 22.

[0022] In this embodiment, through the connected design, the overall strength of the packer can be significantly increased; this structural reinforcement helps the packer maintain stability in a high-pressure environment and prevent deformation or damage caused by excessive pressure.

[0023] Furthermore, the wireline retrievable oil seal packer further includes a first spacer ring 9 and a second spacer ring 29. The first spacer ring 9 is disposed at the connection between the side rubber barrel 8 and the middle rubber barrel 10, and the second spacer ring 29 is disposed at the connection between the middle rubber barrel 10 and the rubber barrel central tube 11.

[0024] In this embodiment, by providing the first spacer ring 9 and the second spacer ring 29, the sealing performance and stability of the packer can be enhanced; these spacer rings are located at different positions to ensure that the packer can achieve the best performance in different environments.

[0025] Furthermore, a taper-end set screw 23 and a fixing screw 24 are provided between the outer cylinder 19 and the lower joint 22. The taper-end set screw 23 is located at the lower joint 22, and the fixing screw 24 is located at the outer cylinder 19.

[0026] Furthermore, the wireline retrievable liner assembly 3 penetrates through the central tube 6, the side rubber barrel 8, the middle rubber barrel 10, the rubber barrel central tube 11, the pressure-bearing sleeve 12, the upper connector 13, and the outer cylinder 19, and communicates with one end of the lower joint 22.

[0027] Furthermore, a first O-ring 4 is provided at the connection between the upper pressure-bearing sleeve 5 and the upper joint 1, a second O-ring 7 is provided at the connection between the side rubber barrel 8 and the central tube 6, a third O-ring 14 and a fourth O-ring 16 are provided at the connection between the upper connector 13 and the piston 15, a fifth O-ring 17 is provided between the wireline retrievable liner assembly 3 and the upper connector 13, and a sixth O-ring 18 is provided at the connection between the outer cylinder 19 and the upper connector 13.

[0028] In this embodiment, an additional sealing layer is provided by the first O-ring 4 to ensure good sealing performance at this critical connection point in a high-pressure environment. The second O-ring 7 prevents leakage of fluid or gas from this connection by providing a tight seal. The third O-ring 14 and the fourth O-ring 16 reduce relative movement between components by increasing the connection stability, thereby reducing the risk of loosening. The fifth O-ring 17 enhances the stability of the entire structure through its design and prevents damage caused by vibration or impact. The sixth O-ring 18 ensures smooth fluid flow inside the packer and reduces flow resistance by optimizing the channel layout.

[0029] In this embodiment, the center tube 6 and the upper pressure sleeve 5 are threadedly connected, the side rubber tube 8, the first spacer ring 9, the middle rubber tube 10 and the second spacer ring 29 are all sleeved on the outside of the rubber tube center tube 11, and the lower end of the rubber tube center tube 11 is threadedly connected to the middle part of the center tube 6.

[0030] In this embodiment, when setting the seal, after the packer is lowered to the designed position, hydraulic pressure is added to the oil pipe. The hydraulic pressure passes through the hydraulic hole of the central pipe 6 to push the piston 15 upward, and at the same time drives the setting cylinder 20 to move upward. When the pressure reaches a certain value, the setting shear nails are sheared off. Under the push of hydraulic force, the setting seal continues to move upward as a whole, and compresses the rubber tubes 8 on both sides, the middle rubber tube 10 and the closed oil casing annulus. After the pressure is released, the locking ring and the locking ring seat 25 enter a bite locking state to prevent the rubber tubes 8 on both sides and the middle rubber tube 10 from rebounding, completing the setting of the packer. When unsealing, the pipe column is lifted. The upper joint 1 drives the central tube 6 and other components to move upward. Due to the friction between the sealing rubber tube and the casing, the unsealing shear nail 27 is cut off, the locking ring and the locking ring seat 25 lose locking, the seal rebounds, and the packer is unsealed. In this way, the technical problem of needing to lower the cable into the well according to the detection needs of different layers in the well according to oil production is effectively solved, resulting in the setting of the packer in the casing making it impossible for the cable to pass through. This requires the cable to be passed through the internal structure of the packer in advance, and most of the existing cable packers are eccentric, which is not conducive to the lowering of subsequent tools and is inconvenient to use.

[0031] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A cable oil production packer, characterized in that: It includes an upper joint, a center tube, a side rubber tube, a middle rubber tube, a rubber tube center tube, a pressure sleeve, an upper connector, an outer tube and a lower joint, one end of the upper joint is provided with a guide body and a cable liner assembly, and the cable liner assembly is located on the guide body, one end of the center tube is provided with an upper pressure sleeve, one end of the upper connector is provided with a sealing shear pin, the outer side of the upper connector is provided with a piston, a sealing cylinder is provided in the outer tube, a locking ring seat and an unsealing shear pin are provided in the sealing cylinder, and the A locking ring body is arranged on the locking ring seat, a lower connecting body is arranged at one end of the outer tube, the center tube is arranged at one end of the upper joint, the side rubber tube is arranged at one end of the center tube, the middle rubber tube is arranged at one end of the center tube, the center tube of the rubber tube is arranged at one end of the middle rubber tube, the pressure sleeve is arranged at one end of the center tube of the rubber tube, the upper connecting body is arranged at one end of the pressure sleeve, the outer tube is arranged at one end of the upper connecting body, and the lower joint is arranged at one end of the outer tube.

2. The cable oil production packer according to claim 1, characterized in that: The upper pressure-bearing sleeve is located below the guide body, and the upper pressure-bearing sleeve is communicated with the guide body.

3. The cable oil production packer according to claim 2, characterized in that: The lower connector is located in the lower connector, and the lower connector is communicated with the lower connector.

4. The cable oil production packer according to claim 3, characterized in that: The cable oil extraction seal also includes a first spacer ring and a second spacer ring. The first spacer ring is arranged at the connection between the side rubber tube and the middle rubber tube, and the second spacer ring is arranged at the connection between the middle rubber tube and the center tube of the rubber tube.

5. The cable oil production packer according to claim 4, characterized in that: A cone-end set screw and a fixing screw are provided between the outer tube and the lower joint, and the cone-end set screw is located at the lower joint, and the fixing screw is located at the outer tube.

6. The cable oil production packer according to claim 5, characterized in that: The cable liner assembly passes through the central tube, the side rubber tube, the middle rubber tube, the rubber tube central tube, the pressure sleeve, the upper connector and the outer tube, and is connected to one end of the lower joint.

7. The cable oil production packer according to claim 6, characterized in that: A first O-ring is provided at the connection between the upper pressure sleeve and the upper joint, a second O-ring is provided at the connection between the side rubber tube and the center tube, a third O-ring and a fourth O-ring are provided at the connection between the upper connector and the piston, a fifth O-ring is provided between the cable liner assembly and the upper connector, and a sixth O-ring is provided at the connection between the outer tube and the upper connector.

Images