CN212774226U - Valve plate type stratum protection device for downhole operation - Google Patents
Valve plate type stratum protection device for downhole operation Download PDFInfo
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- CN212774226U CN212774226U CN202021709035.XU CN202021709035U CN212774226U CN 212774226 U CN212774226 U CN 212774226U CN 202021709035 U CN202021709035 U CN 202021709035U CN 212774226 U CN212774226 U CN 212774226U
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Abstract
The utility model discloses a valve plate formula is stratum protection device for borehole operation, its characterized in that: including the top connection, the disk seat, the straining cover, the valve plate room, the torsional spring, valve plate subassembly and guide shoe, top connection and guide shoe fixed connection, disk seat and top connection inner wall fixed connection, set up straining cover and valve plate room between disk seat and the guide shoe, straining cover inner wall respectively with disk seat outer wall and the outdoor wall fixed connection of valve plate, the valve plate room, torsional spring and valve plate subassembly pass through pin joint, the valve plate subassembly includes the valve plate, piston and leaf spring, it is provided with pressure balance hole to link up on the valve plate, the piston passes through the leaf spring setting in pressure balance hole, piston and the sealed cooperation of pressure balance hole, the valve plate is in the sealed cooperation of disk seat under the torsional spring effect. Adopt the utility model discloses, can effectively completely cut off pit shaft lower part reservoir stratum after the packer is set up, reduce well head pressure, reduce the use of kill fluid, reduce the pollution of each operation stage pit shaft liquid to the reservoir stratum, protect the stratum and reduce the processing cost of operation and production back in-process.
Description
Technical Field
The utility model relates to a valve plate formula is stratum protection device for borehole operation belongs to oil gas field development technical field.
Background
For formations that are unconsolidated or poorly consolidated and require sand control completions, loss of wellbore fluids is very common. Meanwhile, with the enhancement of the exploitation strength of the oil field, the stratum is seriously lacked, the pressure is reduced, and a large amount of working fluid enters the reservoir during the later-stage workover operation to pollute the stratum.
During the well completion and workover operation, the first scheme is to use a well killing hydraulic well, which can increase the leakage of working fluid, cause reservoir pollution, prolong the flowback time, increase the operation cost, lead to long productivity recovery period and influence the productivity and development effect of the oil and gas well. The second scheme is operation under pressure, which can increase the potential safety hazard.
Disclosure of Invention
An object of the utility model is to overcome the above-mentioned problem that prior art exists, provide a valve plate formula is stratum protection device for borehole operation. Adopt the utility model discloses, can effectively completely cut off pit shaft lower part reservoir stratum after the packer is set up, reduce well head pressure, reduce the use of kill fluid, reduce the pollution of each operation stage pit shaft liquid to the reservoir stratum, protect the stratum and reduce the operation and put into production the back handling cost of in-process, and the stratum protection device can be opened or closed as required in the later stage.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a valve plate formula is stratum protection device for borehole operation which characterized in that: including the top connection, the disk seat, the straining cover, the valve plate room, the torsional spring, valve plate subassembly and guide shoe, top connection and guide shoe fixed connection, disk seat and top connection inner wall fixed connection, set up straining cover and valve plate room between disk seat and the guide shoe, straining cover inner wall respectively with disk seat outer wall and the outdoor wall fixed connection of valve plate, the valve plate room, torsional spring and valve plate subassembly pass through pin joint, the valve plate subassembly includes the valve plate, piston and leaf spring, it is provided with pressure balance hole to link up on the valve plate, the piston passes through the leaf spring setting in pressure balance hole, piston and the sealed cooperation of pressure balance hole, the valve plate is in the sealed cooperation of disk seat under the torsional spring effect.
The upper joint and the guide shoe are fastened through a set screw, and the valve seat, the tensioning sleeve and the valve plate chamber are fastened through the set screw.
The inner wall of the upper joint is provided with a torsion step, the upper end of the valve seat is positioned on the torsion step, and metal-to-metal hard sealing is arranged between the torsion step and the valve seat.
And the threads at the two ends of the tensioning sleeve are respectively in left-handed rotation and right-handed rotation and are respectively connected with the valve seat and the valve plate chamber.
The metal-to-metal hard seal is arranged between the valve seat and the valve plate, and a sealing ring for auxiliary sealing is embedded on the valve seat.
The top surface of the valve plate is of an arc-shaped structure, the periphery of the arc-shaped structure is a metal sealing surface, and the back surface of the valve plate is flat.
The upper joint is fixedly connected with the guide shoe through threads, the valve seat is fixedly connected with the inner wall of the upper joint through threads, and the inner wall of the tensioning sleeve is fixedly connected with the outer wall of the valve seat and the outer wall of the valve plate chamber through threads respectively.
The valve plate rotates about the pin in the range of 0 to 90.
Adopt the utility model has the advantages of:
one, adopt the utility model discloses behind the device, can completely cut off pit shaft lower part reservoir stratum, reduce well head pressure, reduce the operation potential safety hazard.
Two, adopt the utility model discloses behind the device, can reduce the use of kill-job fluid, reduce the pollution of pit shaft liquid to the reservoir, protect the stratum and reduce the handling cost in operation and the production after putting into production.
Thirdly, adopt the utility model discloses behind the device, can transfer as required/lift the tubular column and open/close the reservoir stratum, need not to use steel wire operation and cable operation equipment.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the present invention in a closed state;
fig. 3 is a schematic structural view of the utility model in an open state;
fig. 4 is the local enlarged structure schematic diagram of the valve plate assembly in the present invention.
Labeled as: 1. the device comprises an upper connector, 2, a set screw, 3, a valve seat, 4, a tensioning sleeve, 5, a valve plate chamber, 6, a sealing ring, 7, a pin, 8, a torsion spring, 9, a valve plate assembly, 10, a guide shoe, 9-1, a valve plate, 9-2, a piston, 9-3 and a plate spring.
Detailed Description
Example 1
A valve plate type stratum protection device for underground operation, which comprises an upper joint 1, a valve seat 3, a tensioning sleeve 4 and a valve plate chamber 5, the valve plate assembly 9 comprises a valve plate 9-1, a piston 9-2 and a plate spring 9-3, a pressure balance hole is formed in the valve plate 9-1 in a through mode, the piston 9-2 is arranged in the pressure balance hole through the plate spring 9-3, the piston 9-1 is in sealing fit with the pressure balance hole, and the valve plate 9-1 is in sealing fit with the valve seat 3 under the action of the torsion spring 8.
The upper connector 1 and the guide shoe 10 are fastened through a set screw 2, and the valve seat 3, the tensioning sleeve 4 and the valve plate chamber 5 are fastened through a set screw.
The inner wall of the upper joint 1 is provided with a torsion step, the upper end of the valve seat 3 is positioned on the torsion step, and metal-to-metal hard sealing is arranged between the torsion step and the valve seat 3.
The threads at the two ends of the tensioning sleeve 4 are respectively in left-handed rotation and right-handed rotation and are respectively connected with the valve seat 3 and the valve plate chamber 5.
And a metal-to-metal hard seal is arranged between the valve seat 3 and the valve plate 9-1, and a sealing ring 6 for auxiliary sealing is embedded on the valve seat 3.
The top surface of the valve plate 9-1 is of an arc structure, so that the matching of the outer diameter and the inner diameter is optimal, the periphery of the arc structure is a metal sealing surface, and the back surface of the valve plate 9-1 is of a flat plate shape.
The upper joint 1 and the guide shoe 10 are fixedly connected through threads, the valve seat 3 is fixedly connected with the inner wall of the upper joint 1 through threads, and the inner wall of the tensioning sleeve 4 is fixedly connected with the outer wall of the valve seat 3 and the outer wall of the valve plate chamber 5 through threads respectively.
The valve plate 9-1 rotates around the pin 7 within the range of 0 to 90.
The utility model discloses connect under top packer assembly, the packer setting back, valve plate 9-1 is in the closed condition under the 7 effects of torsional spring, has realized the isolated to pit shaft lower part reservoir stratum. If the valve plate needs to be opened in the later stage, only the tubular column needs to be placed, the valve plate is jacked through the inserted short section at the tail end of the tubular column, the upper portion and the lower portion of the communicated shaft are communicated, and the valve plate is automatically closed when the tubular column is lifted.
Example 2
The technical solution in the present embodiment will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in figure 1, the stratum protection device for the valve plate type downhole operation comprises an upper connector 1, a set screw 2, a valve seat 3, a tensioning sleeve 4, a valve plate chamber 5, a sealing ring 6, a pin 7, a torsion spring 8, a valve plate assembly 9 and a guide shoe 10. Wherein, the valve plate assembly 9 comprises a valve plate 9-1, a piston 9-2 and a plate spring 9-3.
In this embodiment, the upper joint 1 and the guide shoe 10 are connected by a screw thread.
The upper connector 1, the valve seat 3, the tensioning sleeve 4 and the valve plate chamber 5 are connected through threads.
The valve plate chamber 5, the torsion spring 8 and the valve plate assembly 9 are connected through the pin 7, and the valve plate assembly 9 can freely rotate around the pin 7 within the range of 0-90 degrees.
The upper joint 1 and the guide shoe 10 are fastened by using a set screw 2.
The upper joint 1 is designed with a torsion step.
And metal-to-metal hard seal is arranged between the upper joint 1 and the valve seat 3.
The threads at the two ends of the tensioning sleeve 4 are respectively in left-handed and right-handed rotation and are connected with the valve seat 3 and the valve plate chamber 5.
And the valve seat 3, the tensioning sleeve 4 and the valve plate chamber 5 are fastened by using a set screw.
Metal-to-metal hard sealing is arranged between the valve seat 3 and the valve plate 9-1, and meanwhile, a sealing ring 6 is embedded on the valve seat 3 for auxiliary sealing.
The valve plate 9-1 is of an arc structure, so that the matching of the outer diameter and the inner diameter is optimal.
The valve plate assembly 9 is in a normally closed state under the action of the torsion spring 8.
The valve plate assembly 9 has a pressure self-balancing function. Normally, when the valve plate assembly 9 is in a closed state, the pressure at the lower end of the valve plate assembly 9 is higher than that at the upper end, a large pressure difference exists, and the piston 9-2 is closely matched with a pressure balance hole in the valve plate 9-1 under the action of the plate spring 9-3 and the pressure difference, so that a sealing function is realized. When the valve plate assembly 9 needs to be opened, the insertion stub at the tail end of the pipe column firstly jacks the piston 9-2, and pressure balance holes in the valve plate 9-1 are opened, so that the pressure at the upper end and the lower end of the valve plate assembly 9 is balanced, and the valve plate assembly 9 is jacked.
The working principle of the utility model is as follows:
closed state (see fig. 2): the valve plate type stratum protection device for downhole operation needs to be matched with a top packer for use, and the lower end of a top packer assembly is in threaded connection with the upper end of the upper connector 1 during downhole. The top packer assembly is put into the well to a preset depth and is set, the valve plate 9-1 is in a closed state under the action of the torsion spring 8, and a reservoir layer below the packer is isolated. The pressure of the lower reservoir acts on the back of the valve plate 9-1, the valve plate 9-1 is pushed to extrude the sealing ring 6 until the metal sealing surface of the valve plate 9-1 is contacted with the metal sealing surface of the valve seat 3, and the sealing effect is better when the pressure is higher. If the upper pressure of the valve plate 9-1 is greater than the lower pressure of the valve plate 9-1, the valve plate 9-1 is opened until the upper and lower pressures of the valve plate 9-1 reach balance, and the valve plate 9-1 is closed under the action of the torsion spring 8.
Open state (see fig. 3): the pipe column end is connected with the inserting short section, the pipe column is placed to be inserted into the top packer, the pipe column is placed continuously, the piston 9-2 is firstly jacked open by the pipe column end inserting short section, the upper pressure and the lower pressure of the valve plate 9-1 are balanced, and then the valve plate 9-1 is jacked open and kept in an open state. If the closing state is recovered, the pipe column is lifted up.
Claims (8)
1. The utility model provides a valve plate formula is stratum protection device for borehole operation which characterized in that: the valve plate assembly comprises an upper connector (1), a valve seat (3), a tensioning sleeve (4), a valve plate chamber (5), a torsion spring (8), a valve plate assembly (9) and a guide shoe, wherein the upper connector (1) is fixedly connected with the guide shoe, the valve seat (3) is fixedly connected with the inner wall of the upper connector (1), the tensioning sleeve (4) and the valve plate chamber (5) are arranged between the valve seat (3) and the guide shoe, the inner wall of the tensioning sleeve (4) is respectively fixedly connected with the outer wall of the valve seat (3) and the outer wall of the valve plate chamber (5), the torsion spring (8) and the valve plate assembly (9) are connected through a pin (7), the valve plate assembly (9) comprises a valve plate (9-1), a piston (9-2) and a plate spring (9-3), a pressure balance hole is arranged on the valve plate (9-1) in a penetrating manner, the piston (9-2), the piston (9-2) is in sealing fit with the pressure balance hole, and the valve plate (9-1) is in sealing fit with the valve seat (3) under the action of the torsion spring (8).
2. The valve plate-type formation protection device for downhole operations of claim 1, wherein: the upper joint (1) and the guide shoe are fastened through a set screw (2), and the valve seat (3), the tensioning sleeve (4) and the valve plate chamber (5) are fastened through the set screw (2).
3. The valve plate-type formation protection device for downhole operations of claim 2, wherein: the inner wall of the upper joint (1) is provided with a torsion step, the upper end of the valve seat (3) is positioned on the torsion step, and metal-to-metal hard sealing is arranged between the torsion step and the valve seat (3).
4. The valve plate-type formation protection device for downhole operations of claim 3, wherein: the threads at the two ends of the tensioning sleeve (4) are respectively in left-handed rotation and right-handed rotation and are respectively connected with the valve seat (3) and the valve plate chamber (5).
5. The valve plate-type formation protection device for downhole operations of claim 4, wherein: the metal-to-metal hard seal is arranged between the valve seat (3) and the valve plate (9-1), and a sealing ring (6) for auxiliary sealing is embedded on the valve seat (3).
6. The valve plate-type formation protection device for downhole operations of claim 5, wherein: the top surface of the valve plate (9-1) is of an arc-shaped structure, the periphery of the arc-shaped structure is a metal sealing surface, and the back surface of the valve plate (9-1) is of a flat plate shape.
7. The valve plate-type formation protection device for downhole operations of claim 6, wherein: the upper joint (1) is fixedly connected with the guide shoe through threads, the valve seat (3) is fixedly connected with the inner wall of the upper joint (1) through threads, and the inner wall of the tensioning sleeve (4) is fixedly connected with the outer wall of the valve seat (3) and the outer wall of the valve plate chamber (5) through threads respectively.
8. The valve plate-type formation protection device for downhole operations of claim 7, wherein: the valve plate (9-1) rotates around the pin (7) within the range of 0-90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021709035.XU CN212774226U (en) | 2020-08-17 | 2020-08-17 | Valve plate type stratum protection device for downhole operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021709035.XU CN212774226U (en) | 2020-08-17 | 2020-08-17 | Valve plate type stratum protection device for downhole operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212774226U true CN212774226U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021709035.XU Active CN212774226U (en) | 2020-08-17 | 2020-08-17 | Valve plate type stratum protection device for downhole operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212774226U (en) |
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2020
- 2020-08-17 CN CN202021709035.XU patent/CN212774226U/en active Active
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