CN213838576U - High-pressure backwashing well packer - Google Patents
High-pressure backwashing well packer Download PDFInfo
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- CN213838576U CN213838576U CN202022947881.1U CN202022947881U CN213838576U CN 213838576 U CN213838576 U CN 213838576U CN 202022947881 U CN202022947881 U CN 202022947881U CN 213838576 U CN213838576 U CN 213838576U
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Abstract
The utility model relates to an oil field oil recovery technical field, in particular to high pressure backwash well packer. The device comprises an upper locking device, a sealing device and a lower locking device, wherein the upper locking device is connected to the lower end of an oil pipe, and the lower locking device is arranged at the lower end of the sealing device; the lower end of the upper locking device is connected with a hydraulic controller, and the lower end of the hydraulic controller is connected with a sealing device. The utility model discloses a can effectively reach the backwash well function, avoid injected fluid pressure height or pressure height in the well to make the packer shift up the phenomenon and take place. The defects that the existing packer has no well backwashing function, cannot backwash a well and can move up the packer when the pressure of injected fluid is high or the pressure in the well is high are overcome.
Description
The technical field is as follows:
the utility model relates to an oil field oil recovery technical field, in particular to high pressure backwash well packer.
Background art:
the packer is a well tool commonly used for oil extraction in an oil field, and the packer is put in a well by measures such as separate-layer mining, separate-layer water injection, fracturing, acidification and the like of an oil-gas well of the oil field.
A common packer basically comprises three main parts: upper locking device, sealing device, lower locking device. The upper locking device is arranged at the upper part of the sealing device, and the lower locking device is arranged at the lower part of the sealing device.
The existing packer has two problems, namely, the existing packer has no back-flushing function and cannot back-flush a well; and secondly, when the injection fluid pressure is high or the pressure in the well is high, the packer moves upwards.
The utility model has the following contents:
the to-be-solved technical problem of the utility model is to provide a high pressure backwash well packer, the device have realized effectively reaching the backwash well function, avoid injection fluid pressure height or the high messenger packer of pressure in the well shift up the phenomenon take place. The defects that the existing packer has no well backwashing function, cannot backwash a well and can move up the packer when the pressure of injected fluid is high or the pressure in the well is high are overcome.
The utility model adopts the technical proposal that: a high-pressure backwashing well packer comprises an upper locking device, a sealing device and a lower locking device, wherein the upper locking device is connected to the lower end of an oil pipe, and the lower locking device is arranged at the lower end of the sealing device; the lower end of the upper locking device is connected with a hydraulic controller, and the lower end of the hydraulic controller is connected with a sealing device;
the hydraulic controller comprises a central pipe and an outer pipe body sleeved outside the central pipe, an upper sealing ring is arranged in a sealing groove of the inner wall of the upper end of the outer pipe body and is sealed with the central pipe through the upper sealing ring, a middle sealing ring and a lower sealing ring are respectively arranged in sealing grooves of the outer walls of the upper end and the lower end of a piston, the upper end of the piston extends into the outer pipe body and is sealed with the inner wall of the outer pipe body through the middle sealing ring, the lower end of the piston extends into a lower joint and is sealed with the inner wall of the lower joint through the lower sealing ring, a limiting step for limiting the piston is arranged on the inner wall of the lower joint, and the outer diameter of the upper end of the piston is larger than the outer diameter of the lower end of the piston, the outer end surface is formed on the outer wall of the piston between the outer tube body and the lower joint, the spring is sleeved on the central tube, the upper end of the spring is propped against the inner end surface of the outer tube body, the lower end of the spring is propped against the step surface of the inner wall of the piston, when the piston moves upwards to the position that the lower sealing ring is separated from the inner wall of the lower joint, the annular space between the lower joint and the central tube is communicated with the outside of the lower joint.
The outer pipe body is connected with the lower end joint of the upper locking device, and the lower end of the lower joint is connected with the upper end joint of the sealing device shell.
The utility model has the advantages that: the utility model discloses owing to adopted hydraulic controller's design, realized effectively reaching the backwash well function, avoided injection fluid pressure height or pressure height in the well to make the packer shift up the phenomenon and take place.
Description of the drawings:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the hydraulic controller.
The specific implementation mode is as follows:
as shown in figure 1, the high-pressure backwashing packer comprises an upper locking device 3, a sealing device 5 and a lower locking device 6, wherein the upper locking device 3 is connected to the lower end of an oil pipe 1, and the lower locking device 6 is arranged at the lower end of the sealing device 5; the lower end of the upper locking device 3 is connected with a hydraulic controller 4, and the lower end of the hydraulic controller 4 is connected with a sealing device 5;
as shown in figure 2, the hydraulic controller 4 comprises a central tube 4-8 and an outer tube 4-2 sleeved outside the central tube 4-8, an upper sealing ring 4-1 is arranged in a sealing groove of the inner wall at the upper end of the outer tube 4-2 and is sealed with the central tube 4-8 through the upper sealing ring 4-1, a middle sealing ring 4-4 and a lower sealing ring 4-6 are respectively arranged in sealing grooves of the outer walls at the upper end and the lower end of a piston 4-5, the upper end of the piston 4-5 extends into the outer tube 4-2 and is sealed with the inner wall of the outer tube 4-2 through the middle sealing ring 4-4, the lower end of the piston 4-5 extends into a lower joint 4-7 and is sealed with the inner wall of the lower joint 4-7 through the lower sealing ring 4-6, and a limiting step for limiting the piston 4-5 is arranged on the inner wall of the lower joint 4-7, the outer diameter of the upper end of the piston 4-5 is larger than that of the lower end, the outer wall of the piston 4-5 between the outer pipe body 4-2 and the lower joint 4-7 forms an outer end face, the spring 4-3 is sleeved on the central pipe 4-8, the upper end of the spring 4-3 is propped against the inner end face of the outer pipe body 4-2, the lower end of the spring 4-3 is propped against the step face of the inner wall of the piston 4-5, and when the piston 4-5 moves upwards to the lower sealing ring 4-6 to separate from the inner wall of the lower joint 4-7, the annular space between the lower joint 4-7 and the central pipe 4-8 is communicated with the outside of the lower joint 4-7.
The outer tube body 4-2 is connected with the lower end joint of the upper locking device 3, and the lower end of the lower joint 4-7 is connected with the upper end joint of the shell of the sealing device 5.
When the device is used, the upper locking device 3 and the lower locking device 6 are fixed in the sleeve 2, when the well is backwashed, high-pressure fluid is injected from a well head, enters the well downwards through the annular space of the sleeve and an oil pipe, and reaches the lower part of the outer pipe body 4-2 of the hydraulic controller 4 and the middle part of the piston 4-5 through the outside of the upper locking device 3, the high-pressure fluid of the backwash well acts on the outer end surface of the middle part of the piston 4-5, so that the piston 4-5 has an upward force which is larger than the sum of the spring force and the pressure at the lower part of the sealing device 5, the piston 4-5 moves upwards, when the lower sealing ring 4-6 is separated from the inner wall of the lower joint 4-7, the sealing between the piston 4-5 and the lower joint 4-7 is released, and the backwash well fluid can enter the lower part of the sealing device 5 through the annular space between the lower joint 4-7 and the central pipe 4-8, and returning the oil to the wellhead through the oil pipe to realize the reverse well washing. After the well is washed back, the piston 4-5 moves downwards under the action of the pressure of the spring 4-3 and returns to the original working state.
When the pressure of fluid injected by the oil pipe is high or the pressure at the bottom of a well is high, the high-pressure fluid enters the inner part of the outer pipe body 4-2 through the annular space between the lower joint 4-7 and the central pipe 4-8 and the annular space between the piston 4-5 and the central pipe 4-8 of the water power controller, so that the piston 4-5 has downward pressure, the lower end of the piston 4-5 abuts against the limiting step on the inner wall of the lower joint 4-7, the downward pressure is transmitted to the upper part of the sealing device 5 through the lower joint 4-7, and the sealing device 5 also has downward force to prevent the packer from moving upwards.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (2)
1. A high-pressure backwashing packer comprises an upper locking device (3), a sealing device (5) and a lower locking device (6), wherein the upper locking device (3) is connected to the lower end of an oil pipe (1), and the lower locking device (6) is installed at the lower end of the sealing device (5); the method is characterized in that: the lower end of the upper locking device (3) is connected with a hydraulic controller (4), and the lower end of the hydraulic controller (4) is connected with a sealing device (5);
the hydraulic controller (4) comprises a central pipe (4-8) and an outer pipe body (4-2) sleeved outside the central pipe (4-8), an upper sealing ring (4-1) is arranged in a sealing groove of the inner wall at the upper end of the outer pipe body (4-2) and is sealed with the central pipe (4-8) through the upper sealing ring (4-1), a middle sealing ring (4-4) and a lower sealing ring (4-6) are respectively arranged in sealing grooves of the outer walls at the upper end and the lower end of a piston (4-5), the upper end of the piston (4-5) extends into the outer pipe body (4-2) and is sealed with the inner wall of the outer pipe body (4-2) through the middle sealing ring (4-4), the lower end of the piston (4-5) extends into a lower joint (4-7) and is sealed with the inner wall of the lower joint (4-7) through the lower sealing ring (4-6), the inner wall of the lower joint (4-7) is provided with a limit step for limiting the piston (4-5), the outer diameter of the upper end of the piston (4-5) is larger than that of the lower end, an outer end face is formed on the outer wall of the piston (4-5) between the outer pipe body (4-2) and the lower joint (4-7), the spring (4-3) is sleeved on the central pipe (4-8), the upper end of the spring (4-3) is propped against the inner end face of the outer pipe body (4-2), the lower end of the spring (4-3) is propped against the step face of the inner wall of the piston (4-5), when the piston (4-5) moves upwards to the lower sealing ring (4-6) to leave the inner wall of the lower joint (4-7), the annular space between the lower joint (4-7) and the central pipe (4-8) is communicated with the outside of the lower joint (4-7).
2. The high pressure backwash well packer according to claim 1, wherein: the outer pipe body (4-2) is connected with a lower end joint of the upper locking device (3), and the lower end of the lower joint (4-7) is connected with an upper end joint of the shell of the sealing device (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022947881.1U CN213838576U (en) | 2020-12-10 | 2020-12-10 | High-pressure backwashing well packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022947881.1U CN213838576U (en) | 2020-12-10 | 2020-12-10 | High-pressure backwashing well packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213838576U true CN213838576U (en) | 2021-07-30 |
Family
ID=76997551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022947881.1U Active CN213838576U (en) | 2020-12-10 | 2020-12-10 | High-pressure backwashing well packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213838576U (en) |
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2020
- 2020-12-10 CN CN202022947881.1U patent/CN213838576U/en active Active
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