CN217538672U

CN217538672U - Be used for fracturing acidizing check valve in pit

Info

Publication number: CN217538672U
Application number: CN202221670577.XU
Authority: CN
Inventors: 王子发; 王剑
Original assignee: Sinopec North China Oil and Gas Co
Current assignee: Sinopec North China Oil and Gas Co
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-04
Anticipated expiration: 2032-06-29

Abstract

The utility model belongs to the technical field of the check valve, and a be used for fracturing acidizing check valve in pit is disclosed, including the check valve, a sealed joint groove has been seted up to the inside right-hand member of check valve, the inside middle part fixed mounting of check valve has the fixed plate, the middle part fixed mounting on fixed plate right side has the spring, the middle part movable mounting of fixed plate has the fixed column, the right side fixed mounting of spring has sealed the pad, the left side fixed mounting of fixed column has the gasket. The utility model discloses a be provided with sealed the pad, a sealing strip and No. two sealing strips etc. have reached the effectual purpose of anti-return flow, pour into fracturing fluid into through the pipeline, when the pressure of fracturing fluid is great, extrude sealed pad, simultaneously through the fixed column beat the gasket right end remove, seal up the inside of check valve through No. two sealing strips and a sealing strip respectively, avoid the fracturing fluid backward flow, make it reach the effectual purpose of anti-return flow.

Description

Be used for fracturing acidizing check valve in pit

Technical Field

The utility model belongs to the technical field of the check valve, specifically be a be used for fracturing acidizing check valve in pit.

Background

Fracture acidizing is called acid fracturing for short. The fracturing without proppant is carried out by using acid liquor as fracturing fluid under the condition that the pressure is higher than the fracture pressure of the stratum. The wall surface of the crack is corroded into an uneven surface by the corrosion action of the acid liquor in the acid fracturing process, so that the wall surface of the crack cannot be completely closed after the pump is stopped for pressure relief. Therefore, the composite material has higher flow conductivity and obvious effect on recovering and improving the production capacity of an oil well. The method is suitable for carbonate reservoirs. In the underground fracturing and acidizing use process, a one-way valve needs to be connected to a pipeline.

Be used for fracturing acidizing check valve in the pit among the prior art structure singleness, overall structure is stable inadequately, and the reverse sealing stability of check valve is not high, and current check valve all is that the single dams, can not realize the secondary and dams, and the effect that the single dams does not reach, leads to appearing the fluid backward flow phenomenon, has reduced the result of use of check valve.

SUMMERY OF THE UTILITY MODEL

For solving the problem that proposes among the above-mentioned background art, the utility model provides a be used for fracturing acidizing check valve in pit has the advantage that the backflow prevention is effectual, the installation of being convenient for.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a be used for fracturing acidizing check valve in pit, includes the check valve, a sealed joint groove has been seted up to the inside right-hand member of check valve, the inside middle part fixed mounting of check valve has the fixed plate, the middle part fixed mounting on fixed plate right side has the spring, the middle part movable mounting of fixed plate has the fixed column, the right side fixed mounting of spring has sealed the pad, the left side fixed mounting of fixed column has the gasket, the inside left end fixed mounting of check valve has the limiting plate, two No. two sealed joint grooves have been seted up respectively in the left side of limiting plate, the right side outer end of gasket is fixed mounting two No. two sealing strips respectively, sealed right side outer end fixed mounting of gasket has a sealing strip.

Among the above-mentioned technical scheme, preferred, both ends difference fixed mounting has left butt joint mouth and right butt joint mouth about the check valve, both ends difference fixed mounting has the sealing ring, two about the check valve is outside the joint groove has been seted up respectively in the outside of sealing ring, the outside threaded connection of right side butt joint mouth has the connector, the inside middle part fixed mounting of connector has the rubber pad.

Among the above-mentioned technical scheme, preferred, the gasket is located the left side of limiting plate, two No. two sealing strip activity joint respectively in the inside in No. two sealed joint grooves, the diameter of gasket is less than the diameter in No. two sealed joint grooves.

Among the above-mentioned technical scheme, it is preferred, sealed right-hand member of filling up is made by the rubber material, a sealing strip activity joint is in the inside in a sealed joint groove, the outside diameter of sealed pad is less than the inside diameter of check valve.

Among the above-mentioned technical scheme, it is preferred, the activity of the outer end on the left of the connector is cup jointed in the inside in joint groove, the outside and the internal connection head threaded connection of right side butt joint mouth.

Among the above-mentioned technical scheme, preferably, both ends are provided with the screw thread respectively about the connector is inside, the surface of left side butt joint mouth and right butt joint mouth all is provided with the screw thread.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a be provided with sealed the pad, a sealing strip has reached the effectual purpose of anti-reflux with No. two sealing strips etc, pour into fracturing fluid into through the pipeline, when the pressure of fracturing fluid is great, extrude sealed pad, fracturing fluid will get into the inside of check valve, the spring will be compressed, sealed pad will move left end, it moves left end to drive the gasket through the fixed column simultaneously, fracturing fluid will pass through the inboard of limiting plate, continue to move inside the pipeline through left side to the interface, when stopping to pour into fracturing fluid into, because the pressure of pipeline right-hand member is less hour this moment, the spring will reset this moment, promote sealed pad to move right-hand member inside the check valve to the right-hand member and seal up, beat the gasket right end through the fixed column simultaneously and move, the gasket joint is in the inside of limiting plate, seal up the inside of check valve through No. two sealing strips and a sealing strip respectively, avoid fracturing fluid reflux, make it reach the effectual purpose of anti-reflux.

2. The utility model discloses a be provided with the sealing ring, left side interface and connector etc. have reached the purpose of the installation of being convenient for, carry out threaded connection with the inside of right side interface and connector left end, the right-hand member of right side interface will laminate mutually with the left side of rubber pad, the left outer end of connector is with the joint in the inside of joint groove simultaneously, screw thread to right side interface surface is protected, avoid long-time unable taking off, be connected the inside of rubber pad right-hand member with the pipeline, seal up pipeline and right side interface through the rubber pad, avoid the acidizing fluid to reveal, make it reach the effect of the installation of being convenient for.

Drawings

FIG. 1 is a schematic view of the overall appearance of the structure of the present invention;

FIG. 2 is a schematic front sectional view of the check valve of the present invention;

FIG. 3 is a schematic view of the structure of the present invention showing the sealing gasket cooperating with the spring;

FIG. 4 is a schematic view of the inside of the check valve of the present invention;

FIG. 5 is an external view of the check valve of the present invention;

fig. 6 is a schematic sectional view of the structural connector of the present invention.

In the figure: 1. a one-way valve; 2. a seal ring; 3. a connector; 4. a left docking port; 5. a right docking port; 6. a clamping groove; 7. a gasket; 8. a rubber pad; 9. fixing a column; 10. sealing the sheet; 11. a spring; 12. a fixing plate; 13. a limiting plate; 14. a first sealing strip; 15. a second sealing strip; 16. a first sealing clamping groove; 17. no. two seal joint groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 6, the utility model provides a be used for well fracturing acidizing check valve, including check valve 1, the right-hand member of check valve 1 inside has seted up No. one sealed joint groove 16, the middle part fixed mounting of check valve 1 inside has fixed plate 12, the middle part fixed mounting on fixed plate 12 right side has spring 11, the middle part movable mounting of fixed plate 12 has fixed column 9, the right side fixed mounting of spring 11 has sealed pad 7, the left side fixed mounting of fixed column 9 has sealing gasket 10, the left end fixed mounting of check valve 1 inside has limiting plate 13, the left side of limiting plate 13 has seted up two No. two sealed joint grooves 17 respectively, the right side outer end of sealing gasket 10 is fixed mounting two No. two sealing strips 15 respectively, the right side outer end fixed mounting of sealed pad 7 has No. one sealing strip 14;

the acid liquor enters the inside of the one-way valve 1 through the right butt joint 5, pressure is applied to the sealing gasket 7 through the acid liquor, the sealing gasket 7 moves towards the left end, the spring 11 is compressed, the sealing gasket 10 is driven to move towards the left end through the fixing column 9 when the sealing gasket 7 moves towards the left end, and at the moment, the acid liquor is discharged through the inner side of the limiting plate 13.

As shown in fig. 1, 2 and 6, a left butt joint port 4 and a right butt joint port 5 are respectively and fixedly installed at the left end and the right end of a check valve 1, sealing rings 2 are respectively and fixedly installed at the left end and the right end outside the check valve 1, clamping grooves 6 are respectively formed in the outer sides of the two sealing rings 2, a connector 3 is in threaded connection with the outside of the right butt joint port 5, and a rubber pad 8 is fixedly installed in the middle inside the connector 3;

adopt above-mentioned scheme: through cup jointing the right-hand member screw thread of connector 3 in the surface of right side interface 5, with the right-hand member and the pipeline threaded connection of connector 3, when right side interface 5 screw thread cup jointed in the inside left end of connector 3, the right side of right side interface 5 will contact with rubber pad 8 and seal right side interface 5.

As shown in fig. 2, 3 and 4, the sealing piece 10 is located on the left side of the limiting plate 13, the two second sealing strips 15 are movably clamped inside the two second sealing clamping grooves 17 respectively, and the diameter of the sealing piece 10 is smaller than that of the second sealing clamping grooves 17;

the scheme is adopted: through 15 joints of No. two sealing strips in the inside of No. two sealed joint grooves 17 sealed up the pipeline, avoid acidizing fluid backward flow when stopping injecting, the gasket 10 seals up the joint in the inboard of limiting plate 13 to the middle part of limiting plate 13 simultaneously.

As shown in fig. 2, 3 and 4, the right end of the sealing gasket 7 is made of rubber, the first sealing strip 14 is movably clamped inside the first sealing clamping groove 16, and the outer diameter of the sealing gasket 7 is smaller than the diameter of the inside of the one-way valve 1;

the scheme is adopted: promote sealed 7 of filling up through spring 11 and seal up the right-hand member of 1 inside of check valve and drive gasket 10 through fixed column 9 simultaneously and move the joint in the middle part of limiting plate 13 to the right-hand member, seal up, a sealing strip 14 joint carries out secondary seal in the inside of a sealed joint groove 16 to check valve 1.

As shown in fig. 1, 2 and 6, the outer end of the left side of the connector 3 is movably sleeved in the clamping groove 6, and the outer part of the right butt joint 5 is in threaded connection with the internal connector 3;

adopt above-mentioned scheme: through cup jointing 3 screw threads of connector in the surface of right side interface 5, the right side of right side interface 5 will laminate mutually with rubber pad 8, and the left outer end of connector 3 will joint in the inside of joint groove 6 this moment, protects the screw thread on right side interface 5 surface, avoids unable taking off for a long time.

As shown in fig. 1, 2, 5 and 6, the left end and the right end inside the connector 3 are respectively provided with threads, and the outer surfaces of the left butt joint port 4 and the right butt joint port 5 are both provided with threads;

adopt above-mentioned scheme: the right end of the right butt joint 5 is connected with the inner thread of the left end of the connector 3, and meanwhile, the inner part of the right end of the connector 3 is connected with the pipeline, and the pipeline and the right butt joint 5 are sealed through the rubber pad 8.

The utility model discloses a theory of operation and use flow:

the right butt joint port 5 is in threaded connection with the inside of the left end of the connector 3, the right end of the right butt joint port 5 is attached to the left side of a rubber gasket 8, the outer end of the left side of the connector 3 is connected with the inside of the clamping groove 6 in a clamped mode, threads on the surface of the right butt joint port 5 are protected, long-time taking-off failure is avoided, the inside of the right end of the rubber gasket 8 is connected with a pipeline, the pipeline and the right butt joint port 5 are sealed through the rubber gasket 8, acid liquor leakage is avoided, fracturing fluid is injected through the pipeline at the moment, when the pressure of the fracturing fluid is large, the sealing gasket 7 is extruded, the fracturing fluid enters the inside of the check valve 1, the spring 11 is compressed, the sealing gasket 7 moves towards the left end, meanwhile, the sealing gasket 10 moves towards the left end through the fixed column 9, the fracturing fluid passes through the inner side of the limiting plate 13, the sealing gasket 10 continues to move towards the inside of the pipeline through the left butt joint port 4, when the fracturing fluid stops being injected, the sealing gasket at the right end, the sealing gasket 11 resets the sealing gasket at the moment, the sealing gasket is sealed by the sealing gasket 14 which moves towards the right end, and the sealing gasket 15 is connected with the limiting plate inside of the check valve.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A one-way valve for downhole fracture acidizing, comprising a one-way valve (1), characterized in that: one number sealed joint groove (16) have been seted up to the right-hand member of check valve (1) inside, the middle part fixed mounting of check valve (1) inside has fixed plate (12), the middle part fixed mounting on fixed plate (12) right side has spring (11), the middle part movable mounting of fixed plate (12) has fixed column (9), the right side fixed mounting of spring (11) has sealed the pad (7), the left side fixed mounting of fixed column (9) has gasket (10), the left end fixed mounting of check valve (1) inside has limiting plate (13), two No. two sealed joint grooves (17) have been seted up respectively in the left side of limiting plate (13), the right side outer end of gasket (10) is fixed mounting two No. two sealing strips (15) respectively, sealed pad (7) right side outer end fixed mounting has sealing strip (14).

2. The one-way valve for downhole fracture acidizing according to claim 1 wherein: the check valve is characterized in that the left end and the right end of the check valve (1) are respectively and fixedly provided with a left butt joint (4) and a right butt joint (5), the left end and the right end of the check valve (1) are respectively and fixedly provided with a sealing ring (2) and a sealing groove (6) are respectively formed in the outer side of the sealing ring (2), the right butt joint is connected with a connector (3) through external threads, and a rubber pad (8) is fixedly arranged in the middle of the connector (3).

3. The one-way valve for downhole fracture acidizing according to claim 1 wherein: the gasket (10) is located the left side of limiting plate (13), two No. two sealing strip (15) activity joint respectively in the inside of two No. two sealed joint grooves (17), the diameter of gasket (10) is less than the diameter of No. two sealed joint grooves (17).

4. The one-way valve for downhole fracture acidizing according to claim 1 wherein: sealing pad (7) right-hand member is made by the rubber material, sealing strip (14) activity joint in the inside of a sealed joint groove (16), the outside diameter that seals up (7) is less than the inside diameter of check valve (1).

5. The one-way valve for downhole fracture acidizing according to claim 2 wherein: the outer end of the left side of the connector (3) is movably sleeved inside the clamping groove (6), and the outer portion of the right butt joint port (5) is in threaded connection with the inner connector (3).

6. The one-way valve for downhole fracture acidizing according to claim 2 wherein: the left end and the right end inside the connector (3) are respectively provided with threads, and the outer surfaces of the left butt joint port (4) and the right butt joint port (5) are respectively provided with threads.