CN211900551U - Underground controllable one-way valve - Google Patents
Underground controllable one-way valve Download PDFInfo
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- CN211900551U CN211900551U CN201922199356.3U CN201922199356U CN211900551U CN 211900551 U CN211900551 U CN 211900551U CN 201922199356 U CN201922199356 U CN 201922199356U CN 211900551 U CN211900551 U CN 211900551U
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Abstract
The utility model provides a downhole controllable one-way valve, which comprises a connecting joint and a lower joint, wherein the lower end of the connecting joint is connected with the lower joint, and a track pipe and a valve clack seat are sequentially sleeved in the connecting joint and the lower joint; the control barrel, the reversing ring, the reversing nail, the limiting ring and the spring are sequentially sleeved on the connecting joint and the inner cavity of the track pipe from top to bottom; the valve clack seat is provided with a valve clack. The utility model discloses a ground bowling suppresses the pressure and realizes freely switching of shutoff state and pump notes construction state in the oil pipe, and the valve clack is hidden between control cylinder and attach fitting under the pump notes construction state, guarantees that the valve clack can not erode the damage, has effectively prolonged its life.
Description
Technical Field
The utility model relates to a controllable formula check valve in pit for construction back oil pipe internal shutoff such as fracturing or abrasive drilling belongs to oil gas field reservoir transformation technical field.
Background
In the technical field of underground tools for oil and gas field development, a flap type check valve is usually used as a measure for plugging in an oil pipe after construction such as fracturing or grinding, so that the functions of adjusting a pipe column under pressure and preventing blowout in the oil pipe after construction are realized. The flap type check valve does not have a reverse circulation function, so the flap type check valve cannot be used under the working condition that reverse circulation is needed, meanwhile, the core of a sealing mechanism for plugging in the oil pipe is a valve flap, when sand is added and fracturing is carried out, sand-carrying liquid is in direct contact with the valve flap, the valve flap is easy to erode and damage, the plugging function in the oil pipe is invalid, and well control risks are caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome and to have now when adding sand fracturing, take sand liquid and valve clack direct contact, easily cause the valve clack erosion to damage, and then the shutoff function inefficacy in its oil pipe causes the problem of well control risk, the utility model provides a controllable formula check valve in pit, the utility model discloses can hide within the casing at fracturing in-process valve clack, guarantee the higher life of check valve, the switching of accessible ground bowling suppressing pressure realization shutoff and opening state has realized the reverse circulation function.
The utility model adopts the technical proposal that:
a downhole controllable one-way valve comprises a connecting joint and a lower joint, wherein the lower end of the connecting joint is connected with the lower joint, and a track pipe and a valve clack seat are sequentially sleeved in the connecting joint and the lower joint; the control barrel, the reversing ring, the reversing nail, the limiting ring and the spring are sequentially sleeved on the connecting joint and the inner cavity of the track pipe from top to bottom; the valve clack seat is provided with a valve clack.
The connecting joint and the lower joint are fixedly connected in a sealing mode, steps are arranged in the connecting joint and the lower joint, and the track pipe and the valve clack seat are axially fixed under the limiting of the connecting joint and the lower joint steps.
The control cylinder is fixedly connected with the limiting ring through threads, the reversing ring is axially fixed under the limiting of the control cylinder and the limiting ring step, one end of the reversing nail is embedded in the circular through hole of the reversing ring, and the other end of the reversing nail is embedded in the track groove of the track pipe.
The valve clack pass through the round pin axle to be fixed in the valve clack seat, the valve clack can realize circumference rotation along the round pin axle, valve clack seat one side is equipped with the trompil, the valve clack hides in valve clack seat trompil under the open mode, and does not influence valve clack seat internal diameter.
The end face of the trace pipe, which is in contact with the valve clack, is provided with a sealing element, and a sealing ring is arranged between the lower end of the trace pipe and the connecting joint.
And a torsion spring is arranged among the track tube, the valve clack and the valve clack seat, the torsion spring works on the pin shaft, one end of the spring arm is fixed in a round hole on the end face of the track tube, and the other end of the spring arm is in contact with the lower end face of the valve clack.
The free position angle of the torsion spring arm is less than or equal to 90 degrees.
The side wall of the track pipe is provided with a track groove, and the reversing nail is in sliding fit with the track groove.
The utility model has the advantages that:
the utility model discloses a ground bowling suppresses the pressure and realizes freely switching of shutoff state and pump notes construction state in the oil pipe, and the valve clack is hidden between control cylinder and attach fitting under the pump notes construction state, guarantees that the valve clack can not erode the damage, has effectively prolonged its life. The switching of plugging and opening states can be realized through ground ball-throwing pressure-building, and the reverse circulation function is realized.
The following will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a downhole controllable check valve.
In the figures, the reference numbers are: 1. connecting a joint; 2. a control cylinder; 3. a commutation ring; 4. a reversing nail; 5. a limiting ring; 6. a trajectory pipe; 7. a spring; 8. a seal member; 9. a torsion spring; 10. a valve flap; 11. a valve flap seat; 12. and a lower joint.
Detailed Description
Example 1:
in order to overcome and to have now when adding sand fracturing, take sand liquid and valve clack direct contact, easily cause the valve clack erosion damage, and then the shutoff function inefficacy in its oil pipe causes the problem of well control risk, the utility model provides a as shown in FIG. 1 controllable formula check valve in pit, the utility model discloses a ground is thrown the ball and is suppressed and realize the free switching of shutoff state and pump injection construction state in the oil pipe, and the valve clack is hidden between a control cylinder and attach fitting under the pump injection construction state, guarantees that the valve clack can not erode the damage, has effectively prolonged its life. The switching of plugging and opening states can be realized through ground ball-throwing pressure-building, and the reverse circulation function is realized.
A controllable check valve in pit comprises a connecting joint 1 and a lower joint 12, wherein the lower end of the connecting joint 1 is connected with the lower joint 12, and a track pipe 6 and a valve clack seat 11 are sequentially sleeved in the connecting joint 1 and the lower joint 12; the inner cavities of the connecting joint 1 and the track tube 6 are sequentially sleeved with a control cylinder 2, a reversing ring 3, a reversing nail 4, a limiting ring 5 and a spring 7 from top to bottom; the valve clack seat 11 is provided with a valve clack 10.
The utility model discloses a ground bowling suppresses the pressure and realizes freely switching of shutoff state and pump injection construction state in the oil pipe, and valve clack 10 hides between control cylinder 2 and attach fitting 1 under the pump injection construction state, guarantees that valve clack 10 can not erode the damage, has effectively prolonged its life. The switching of plugging and opening states can be realized through ground ball-throwing pressure-building, and the reverse circulation function is realized.
Example 2:
based on embodiment 1 basis, in this embodiment, attach fitting 1 and lower clutch 12 sealing fixed connection, attach fitting 1 and lower clutch 12 in all be equipped with the step, axial fixity is realized to orbit pipe 6 and valve clack seat 11 under attach fitting 1 and lower clutch 12 step are spacing.
The control cylinder 2 is fixedly connected with the limiting ring 5 through threads, the reversing ring 3 is axially fixed under the limiting of the steps of the control cylinder 2 and the limiting ring 5, one end of the reversing nail 4 is embedded in a circular through hole of the reversing ring 3, and the other end of the reversing nail is embedded in a track groove of the track pipe 6.
Further, the inner cavities of the connecting joint 1 and the track pipe 6 are sequentially sleeved with a control cylinder 2, a reversing ring 3, a reversing nail 4, a limiting ring 5 and a spring 7 from top to bottom, the control cylinder 2 is fixedly connected with the limiting ring 5 through threads, the reversing ring 3 is axially fixed under the limiting of the steps of the control cylinder 2 and the limiting ring 5, the reversing nail can rotate circumferentially, one end of the reversing nail 4 is embedded in a circular through hole of the reversing ring 3, and the other end of the reversing nail is embedded in a track groove of the track pipe 6.
The valve clack 10 is fixed in the valve clack seat 11 through a pin shaft, the valve clack 10 can rotate in the circumferential direction along the pin shaft, an opening is formed in one side of the valve clack seat 11, and the valve clack 10 is hidden in the opening of the valve clack seat 11 in an opening state.
Further, the valve clack 10 is fixed in the valve clack seat 11 through the round pin axle, and the valve clack 10 can realize the circumference rotation along the round pin axle, and 11 one sides of valve clack seat are equipped with the trompil, and the valve clack 10 hides in 11 trompils of valve clack seat under the open mode, and does not influence the valve clack seat internal diameter.
And a sealing piece 8 is arranged on the end face of the trace tube 6, which is in contact with the valve clack 10, and a sealing ring is arranged between the lower end of the trace tube 6 and the connecting joint 1.
Furthermore, a sealing element 8 is arranged on the end face of the trace tube 6, which is in contact with the valve clack 10, a sealing ring is arranged between the lower end of the trace tube 6 and the connecting joint 1, when the valve clack is attached to the sealing element 8, the valve clack 10 and the trace tube 6 can form end face sealing by means of hydraulic pressure, and then pressure plugging of an oil pipe is realized.
And a torsion spring 9 is also arranged between the track tube 6, the valve clack 10 and the valve clack seat 11, the torsion spring 9 works on the pin shaft, one end of the spring arm is fixed in a circular hole on the end face of the track tube 6, and the other end of the spring arm is in contact with the lower end face of the valve clack 10.
Furthermore, a torsion spring 9 is arranged between the track tube 6, the valve clack 10 and the valve clack seat 11, the torsion spring 9 works on the pin shaft, one end of the spring arm is fixed in a circular hole on the end face of the track tube 6, the other end of the spring arm is in contact with the lower end face of the valve clack 10, and in a natural state, the track tube 6 is attached to the valve clack 10 under the torsion action of the torsion spring 9.
The free position angle of the arm of the torsion spring 9 is less than or equal to 90 degrees.
Furthermore, the free position angle of the arm of the torsion spring 9 is smaller than or equal to 90 degrees, and when the angle is larger than 90 degrees, the track pipe 6 and the valve clack 10 cannot be in contact due to insufficient torsion of the spring.
The side wall of the track pipe 6 is provided with a track groove, and the reversing nail 4 is in sliding fit with the track groove.
Furthermore, a track groove is formed in the side wall of the track pipe 6, the reversing nail 4 is in sliding fit with the track groove, and when the control barrel 2 moves, the displacement distance of the control barrel 2 is limited through the track groove and the reversing nail 4.
The outer circular surface of the lower end of the control cylinder 2 is in clearance fit with the inner circular surface of the lower end of the trace pipe 6 and the inner circular surface of the lower joint 12.
Furthermore, the outer circle surface of the lower end of the control cylinder 2 is in clearance fit with the inner circle surface of the lower end of the trace pipe 6 and the inner circle surface of the lower joint 12, when the control cylinder 2 moves in the lower joint, the clearance between the control cylinder and the lower joint is small, the sand prevention effect can be achieved, and the valve clack sealing is prevented from being influenced.
Example 3:
based on embodiments 1 and 2, the present embodiment provides a method for controlling a downhole controllable check valve, which includes the following specific steps:
when in a pump injection or backwashing well construction state, the outer wall of the lower end of the control cylinder 2 in the check valve is contacted with the inner wall of the lower connector 12, the spring 7 is in a compressed state, the reversing nail 4 is positioned at the position of the short groove of the track pipe 6, and the valve clack 10 is recovered between the outer wall of the lower end of the control cylinder 2 and the inner wall of the connecting connector 1, so that the check valve ensures enough inner path diameter, and the valve clack 10 is not contacted with sand-carrying liquid pumped all the time, thereby ensuring that the valve clack 10 is not damaged by erosion;
when the drilling tool needs to be adjusted under pressure or the interior of the oil pipe needs to be subjected to blowout prevention, a ball in the oil pipe is located on an inclined plane at the upper end of the control cylinder 2, the spring 7 is further compressed under the action of hydraulic pressure, the control cylinder 2 drives the reversing ring 3 and the reversing nail 4 to move downwards, the reversing nail 4 slides on the track pipe 6 to realize that a short groove is switched to a long groove, at the moment, the pump is stopped for pressure relief, the reversing nail 4 can slide in the long groove under the action of the elastic force of the spring 7, the control cylinder 2 moves upwards to the upper end of the valve clack seat 11, the valve clack 10 pops out to be in contact with the lower end face of the track pipe 6 and the sealing element 8 under the action of the torsion spring 9, axial sealing is formed under the action of;
after the drilling tool is adjusted to a designated position under pressure, the pressure in the oil pipe is raised, the control cylinder 2 can move downwards, the compression spring 7 and the reversing nail 4 are switched to the short groove position of the track pipe 6, the valve clack 10 is recovered between the outer wall of the lower end of the control cylinder 2 and the inner wall of the connecting joint 1, and at the moment, the one-way valve is switched to a pump injection or backwashing construction state.
The utility model discloses a ground bowling suppresses the pressure and realizes freely switching of shutoff state and pump injection construction state in the oil pipe, and valve clack 10 hides between control cylinder 2 and attach fitting 1 under the pump injection construction state, guarantees that valve clack 10 can not erode the damage, has effectively prolonged its life. The switching of plugging and opening states can be realized through ground ball-throwing pressure-building, and the reverse circulation function is realized.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The device structure and the system method which are not described in detail in the embodiment are all the well-known technologies and common methods in the industry, and are not described one by one here.
Claims (7)
1. The utility model provides a controllable formula check valve in pit which characterized in that: the valve comprises a connecting joint (1) and a lower joint (12), wherein the lower end of the connecting joint (1) is connected with the lower joint (12), and a track pipe (6) and a valve clack seat (11) are sequentially sleeved in the connecting joint (1) and the lower joint (12); the inner cavities of the connecting joint (1) and the track pipe (6) are sequentially sleeved with a control cylinder (2), a reversing ring (3), a reversing nail (4), a limiting ring (5) and a spring (7) from top to bottom; the valve flap seat (11) is provided with a valve flap (10); valve clack (10) fix in valve clack seat (11) through the round pin axle, circumference rotation can be realized along round pin axle to valve clack (10), valve clack seat (11) one side is equipped with the trompil, valve clack (10) hide under the open mode in valve clack seat (11) trompil, and do not influence valve clack seat (11) internal diameter.
2. A downhole controllable one-way valve according to claim 1, wherein: the sealing device is characterized in that the connecting joint (1) is fixedly connected with the lower joint (12) in a sealing mode, steps are arranged in the connecting joint (1) and the lower joint (12), and the track pipe (6) and the valve clack seat (11) are axially fixed under the limiting of the steps of the connecting joint (1) and the lower joint (12).
3. A downhole controllable one-way valve according to claim 1, wherein: the control cylinder (2) is fixedly connected with the limiting ring (5) through threads, the reversing ring (3) is axially fixed under the limiting of the steps of the control cylinder (2) and the limiting ring (5), one end of the reversing nail (4) is embedded in a circular through hole of the reversing ring (3), and the other end of the reversing nail is embedded in a track groove of the track pipe (6).
4. A downhole controllable one-way valve according to claim 1, wherein: the valve is characterized in that a sealing piece (8) is arranged on the end face, in contact with the valve clack (10), of the track pipe (6), and a sealing ring is arranged between the lower end of the track pipe (6) and the connecting joint (1).
5. A downhole controllable one-way valve according to claim 1, wherein: and a torsion spring (9) is further arranged among the track tube (6), the valve clack (10) and the valve clack seat (11), the torsion spring (9) works on the pin shaft, one end of the spring arm is fixed in a circular hole in the end face of the track tube (6), and the other end of the spring arm is in contact with the lower end face of the valve clack (10).
6. A downhole controllable one-way valve according to claim 5, wherein: the free position angle of the arm of the torsion spring (9) is less than or equal to 90 degrees.
7. A downhole controllable one-way valve according to claim 1, wherein: the side wall of the track pipe (6) is provided with a track groove, and the reversing nail (4) is in sliding fit with the track groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922199356.3U CN211900551U (en) | 2019-12-10 | 2019-12-10 | Underground controllable one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922199356.3U CN211900551U (en) | 2019-12-10 | 2019-12-10 | Underground controllable one-way valve |
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| Publication Number | Publication Date |
|---|---|
| CN211900551U true CN211900551U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922199356.3U Active CN211900551U (en) | 2019-12-10 | 2019-12-10 | Underground controllable one-way valve |
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| CN (1) | CN211900551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021989A (en) * | 2019-12-10 | 2020-04-17 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Underground controllable one-way valve and control method |
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2019
- 2019-12-10 CN CN201922199356.3U patent/CN211900551U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021989A (en) * | 2019-12-10 | 2020-04-17 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Underground controllable one-way valve and control method |
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Effective date of registration: 20201113 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1207 Patentee before: CHANGQING DOWNHOLE TECHNOLOGY OPERATION COMPANY OF CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Patentee before: CHINA NATIONAL PETROLEUM Corp. Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |