CN216110613U - Pressure relief type cutting device for deep water sleeve - Google Patents
Pressure relief type cutting device for deep water sleeve Download PDFInfo
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- CN216110613U CN216110613U CN202122633060.5U CN202122633060U CN216110613U CN 216110613 U CN216110613 U CN 216110613U CN 202122633060 U CN202122633060 U CN 202122633060U CN 216110613 U CN216110613 U CN 216110613U
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- push rod
- deep water
- cutting device
- spring
- pressure relief
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Abstract
The utility model belongs to the technical field of cutting tools in oil and natural gas underground casings, and discloses a cutting device for a pressure relief type deep water jacket pipe, which comprises an upper short joint, wherein a bush is connected below the upper short joint, a piston rod is arranged in the middle of the upper short joint, one end of the piston rod is connected with an installation frame, a guide wheel is installed in the middle of the installation frame, a push rod is arranged in the bush, and a cutting knife is arranged in the middle of the bush; the drilling device is provided with the piston rod, the mounting frame and the guide wheels, the guide wheels are rotatably connected with the mounting frame, the piston rod is in short connection and sliding connection with the upper part, and four groups of guide wheels are arranged.
Description
Technical Field
The utility model belongs to the technical field of cutting tools in petroleum and natural gas downhole casings, and particularly relates to a cutting device for a pressure relief type deep water casing.
Background
In order to prevent oil gas leakage from threatening the natural environment, simultaneously, in order to more reasonably and comprehensively utilize oil gas resources, after exploration and oil gas resource evaluation, the oil gas wells without economic value and potential safety hazard wells needing to be abandoned after reaching service life are sealed, then well abandoning operation is gradually completed, and the key technology in the well abandoning operation relates to casing cutting.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cutting device for a pressure relief type deep water jacket pipe, which solves the problems that a cutting knife is broken and the cutting knife is locked and cannot be reset due to shaking generated when the conventional cutting device for the pressure relief type deep water jacket pipe is used for cutting.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a pressure release formula deep water cutting device for sleeve pipe, includes the upper portion short circuit, the below of upper portion short circuit is connected with the bush, the below of bush is connected with the lower part short circuit, the centre of upper portion short circuit is provided with the piston rod, the one end of piston rod is connected with the mounting bracket, the intermediate position department of mounting bracket installs the guide pulley, the inside of bush is provided with the push rod, the intermediate position department of push rod is connected with the sleeve, the below of push rod is provided with first spring, the top of push rod is connected with the case, the top of case is connected with throttling nozzle, the intermediate position department of bush is provided with the sword groove, the internally mounted of sword groove has the cutting knife.
Preferably, the lower part of the push rod is connected with a joint, a steel ball and a third spring are arranged in the middle of the joint, one end of the joint is connected with a fixed cover, and the steel ball is elastically connected with the fixed cover through the third spring.
Preferably, a second spring is arranged outside the piston rod, and one end of the second spring is connected with a limiting plate.
Preferably, a sliding groove is formed in the middle of the sleeve, and a limiting rod is arranged in the middle of the bushing.
Preferably, a pin is arranged in the middle of the sleeve, and the sleeve is fixedly connected with the push rod through the pin.
Preferably, a groove is formed in the outer portion of the valve core, and a sealing ring is mounted in the groove.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the drilling fluid pressure boosting device is provided with a piston rod, an installation frame and guide wheels, wherein the guide wheels are rotatably connected with the installation frame, the installation frame is fixedly connected with the piston rod, the piston rod is in short connection and sliding connection with the upper part, and four groups of guide wheels are arranged.
(2) The drilling fluid injection device is provided with a connector, a fixing cover, a steel ball and a third spring, wherein the connector is fixedly connected with a push rod, the fixing cover is fixedly connected with the connector, the push rod, the connector and the fixing cover are communicated, the aperture in the fixing cover and the diameter of the steel ball are larger than the aperture in the connector, during work, drilling fluid is injected from the upper part of the push rod, the pressure is larger, the third spring is stressed and contracted, at the moment, the steel ball cannot block a through hole, the drilling fluid normally flows, when a cutting knife is blocked and the reset spring cannot reset, the flow direction of the drilling fluid can be changed, the elastic force of the third spring is consistent with the flow direction of the drilling fluid, and the steel ball props against the through hole, so that larger negative pressure is generated in the device to force the push rod to rise, and the cutting knife is retracted.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top cross-sectional view of the present invention;
FIG. 3 is an enlarged view of FIG. 1 at A;
FIG. 4 is an enlarged view of FIG. 1 at B;
in the figure: 1. the upper part is short-circuited; 2. a bushing; 3. a seal ring; 4. a pin; 5. a chute; 6. a limiting rod; 7. a cutter groove; 8. a cutting knife; 9. a push rod; 10. a first spring; 11. the lower part is short-circuited; 12. a mounting frame; 13. a guide wheel; 14. a piston rod; 15. a second spring; 16. a throttling nozzle; 17. a valve core; 18. a sleeve; 19. a limiting plate; 20. a joint; 21. a fixed cover; 22. a third spring; 23. and (5) steel balls.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides a pressure release formula deep water cutting device for sleeve pipe, including upper portion short circuit 1, the below of upper portion short circuit 1 is connected with bush 2, the below of bush 2 is connected with lower part short circuit 11, the centre of upper portion short circuit 1 is provided with piston rod 14, the one end of piston rod 14 is connected with mounting bracket 12, the intermediate position department of mounting bracket 12 installs guide pulley 13, the inside of bush 2 is provided with push rod 9, the intermediate position department of push rod 9 is connected with sleeve 18, the below of push rod 9 is provided with first spring 10, the top of push rod 9 is connected with case 17, the top of case 17 is connected with throttling nozzle 16, the intermediate position department of bush 2 is provided with sword groove 7, the internally mounted of sword groove 7 has cutting knife 8, upper portion short circuit 1, bush 2 and lower part short circuit 11 all pass through screw thread fixed connection each other, the intermediate position department of upper portion short circuit 1 has seted up the through-hole for installing piston rod 14, piston rod 14, Mounting bracket 12 and guide pulley 13 are provided with four groups altogether, and every group has two guide pulleys 13, through four group's guide pulleys 13 combined action, makes the device be in intraductal central point and puts, guarantees that cutting knife 8 atress is even, and effective prevention device rocks, avoids cutting knife 8 fracture, and cutting knife 8 is provided with four altogether, and tool bit skin weld has the alloy cutting edge, improves cutting efficiency.
Further, the below of push rod 9 is connected with joint 20, the centre of joint 20 is provided with steel ball 23 and third spring 22, the one end of joint 20 is connected with fixed lid 21, steel ball 23 passes through third spring 22 elastic connection with fixed lid 21, push rod 9, joint 20 and fixed lid 21 intercommunication, aperture and steel ball 23 diameter in the fixed lid 21 are greater than the aperture in the joint 20, steel ball 23 diameter is less than the internal hole diameter of fixed lid 21, when cutting knife 8 blocks, first spring 10 can not reset, can change the drilling fluid flow direction, third spring 22 elasticity is unanimous with the drilling fluid flow direction, make steel ball 23 withstand the through-hole, produce great negative pressure in the messenger's device, force push rod 9 to rise, thereby withdraw cutting knife 8.
Furthermore, a second spring 15 is arranged outside the piston rod 14, one end of the second spring 15 is connected with a limiting plate 19, and the second spring 15 is used for resetting the piston rod 14, so that the piston rod 14 is automatically retracted after cutting is finished, and the cutting device is convenient to recover.
Specifically, the middle position of the sleeve 18 is provided with a sliding groove 5, and the middle position of the bushing 2 is provided with a limiting rod 6.
It is worth mentioning that a pin 4 is arranged at a middle position of the sleeve 18, and the sleeve 18 and the push rod 9 are fixedly connected through the pin 4.
Further, a groove is formed in the outer portion of the valve core 17, a sealing ring 3 is arranged in the groove, the sealing ring 3 is annular and fixed to the outer portion of the valve core 17 through the groove, leakage of drilling fluid is avoided, and pressure intensity is reduced.
The working principle and the using process of the utility model are as follows: when the utility model is used, the device is put into a pipe, after the device reaches a designated position, drilling fluid is injected, the drilling fluid flows through the upper short circuit 1, the piston rod 14 moves outwards, the guide wheel 13 is abutted against the inner wall fixing device of the pipeline, when the drilling fluid passes through the valve core 17 and the throttling nozzle 16, the aperture is reduced, pressure is generated, the push rod 9 slides downwards, the top of the cutting knife 8 is pushed through the sleeve 18, the cutting knife 8 is opened outwards to cut the pipeline, the cutting knife 8 is continuously opened along with the continuous cutting, the drilling fluid is stopped being injected until the pipeline finishes cutting, at the moment, the second spring 15 pushes the piston rod 14 to drive the mounting frame 12 and the guide wheel 13 to withdraw, the device is convenient for later recovery, if the device can not be recovered, the cutting knife 8 is blocked with the cutting groove, the elasticity of the first spring 10 is not enough to push the push rod 9 back, the cutting knife 8 is withdrawn, at the moment, the drilling fluid flows reversely, the elasticity of the third spring 22 is consistent with the flow direction of the drilling fluid, and the steel ball 23 is propped against the through hole, so that large negative pressure is generated in the device, the push rod 9 is forced to rise, and the cutting knife 8 is retracted.
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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a pressure release formula deep water cutting device for sleeve pipe, includes upper portion short circuit (1), its characterized in that: the utility model discloses a quick-witted, including upper portion short circuit (1), guide pulley (13), upper portion short circuit (1), piston rod (14), the one end of piston rod (14) is connected with mounting bracket (12), guide pulley (13) are installed to the intermediate position department of mounting bracket (12), the inside of bush (2) is provided with push rod (9), the intermediate position department of push rod (9) is connected with sleeve (18), the below of push rod (9) is provided with first spring (10), the top of push rod (9) is connected with case (17), the top of case (17) is connected with throttle nozzle (16), the intermediate position department of bush (2) is provided with sword groove (7), the internally mounted of sword groove (7) has cutting knife (8).
2. The cutting device for the pressure relief type deep water casing according to claim 1, wherein: the lower part of the push rod (9) is connected with a joint (20), a steel ball (23) and a third spring (22) are arranged in the middle of the joint (20), one end of the joint (20) is connected with a fixed cover (21), and the steel ball (23) is elastically connected with the fixed cover (21) through the third spring (22).
3. The cutting device for the pressure relief type deep water casing pipe according to claim 2, wherein: a second spring (15) is arranged outside the piston rod (14), and one end of the second spring (15) is connected with a limiting plate (19).
4. The cutting device for the pressure relief type deep water casing pipe according to claim 3, wherein: a sliding groove (5) is formed in the middle of the sleeve (18), and a limiting rod (6) is arranged in the middle of the bushing (2).
5. The cutting device for the pressure relief type deep water casing pipe according to claim 4, wherein: the middle position of the sleeve (18) is provided with a pin (4), and the sleeve (18) is fixedly connected with the push rod (9) through the pin (4).
6. The cutting device for the pressure relief type deep water casing pipe according to claim 5, wherein: a groove is formed in the outer portion of the valve core (17), and a sealing ring (3) is mounted in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122633060.5U CN216110613U (en) | 2021-10-31 | 2021-10-31 | Pressure relief type cutting device for deep water sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122633060.5U CN216110613U (en) | 2021-10-31 | 2021-10-31 | Pressure relief type cutting device for deep water sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216110613U true CN216110613U (en) | 2022-03-22 |
Family
ID=80711170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122633060.5U Active CN216110613U (en) | 2021-10-31 | 2021-10-31 | Pressure relief type cutting device for deep water sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216110613U (en) |
-
2021
- 2021-10-31 CN CN202122633060.5U patent/CN216110613U/en active Active
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