CN202117625U - Annular pressure control type underbalance well casing valve - Google Patents
Annular pressure control type underbalance well casing valve Download PDFInfo
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- CN202117625U CN202117625U CN2010206235578U CN201020623557U CN202117625U CN 202117625 U CN202117625 U CN 202117625U CN 2010206235578 U CN2010206235578 U CN 2010206235578U CN 201020623557 U CN201020623557 U CN 201020623557U CN 202117625 U CN202117625 U CN 202117625U
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- floating piston
- valve
- casing
- valve plate
- connecting rod
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Abstract
The utility model provides an annular pressure control type underbalance well casing valve, which adjusts a pressure difference between an annulus outside a casing and inside of the casing through decreasing and increasing of a pressure of an annulus well mouth outside the casing valve and thus drives a floating piston hydraulic cylinder to move to a bottom end or a top end and drives a connecting rod to push or pull a valve plate for realizing the closing and opening of the valve plate. When the floating piston hydraulic cylinder moves to the bottom end, the connecting rod pulls the valve plate to descend, the valve plate is opened, and then the casing valve can be used for normal drilling operation. When the floating piston hydraulic cylinder moves to the top end, the connecting rod pushes the valve plate to ascend, the valve plate is closed, then required operation can be performed in the casing on the casing valve. The annular pressure control method simplifies an opening/closing control system of the valve plate and operation procedures, improves working efficiency of the underbalance well casing valve greatly and further lowers the working risks of the underbalance well casing valve.
Description
Technical field
The utility model relates to the under balance pressure drilling field, relates in particular to a kind of ring pressure-controlled type under balance pressure drilling casing valve, and it is in the oil gas field under balance pressure drilling process, is used for the special tool of control well setting of casing internal pressure.
Background technology
In the under-balanced drilling technology in early days, the pressure control in the sleeve pipe is the well control device that relies on the ground well head.When the well control device of employing ground well head is controlled the sleeve pipe internal pressure in the under balance pressure drilling process, in normal drilling process, good guarantee is arranged under balance pressure drilling.But, there are poor efficiency and excessive risk for putting other operations such as brill, well logging and completion in the under balance pressure drilling.Development and application along with under balance pressure drilling casing valve technology; Realized under balance pressure drilling put other operations such as brill, well logging and completion the time; The control of pressure in the sleeve pipe has been placed on the down-hole through casing valve; Both improved the operating efficiency of operation, reduced operating risk again, and had widely and applied.
Present under balance pressure drilling casing valve technology, its control is main to divide three types.First kind, valve plate is at down-hole switch, through the hydraulic system on ground and the associated mechanisms on the sleeve pipe valve body, realizes control with the mode of hydraulic pressure.Second kind, valve plate through the electric-control system on ground and the associated mechanisms on the sleeve pipe valve body, is realized control with automatically controlled mode at down-hole switch.The third, valve plate is at down-hole switch, through scurrying the special tool that connects and the associated mechanisms on the sleeve pipe valve body on the drilling tool, realizes control with mechanical mode.Three types control mode can both realize the control for down hole sleeve valve valve plate switch effectively, but all exists the control system architecture complicated, the problem that operation procedure is numerous and diverse.
Ring pressure-controlled type under balance pressure drilling casing valve; Through reducing and improve the pressure of casing valve outer shroud empty well mouth; The interior pressure differential of adjustment casing valve casing annulus and sleeve pipe is controlled the open and close of down hole sleeve valve valve plate, has cancelled traditional methods of controlling such as hydraulic pressure, automatically controlled and special-purpose machinery instrument; Both simplify the control system of valve plate switch, simplified operation procedure simultaneously.Greatly improve the operating efficiency of under balance pressure drilling casing valve, further reduced the operating risk of under balance pressure drilling casing valve.
Summary of the invention
To the problems referred to above, the purpose of the utility model is to provide a kind of ring pressure-controlled type under balance pressure drilling casing valve, to solve problems of the prior art.
To achieve these goals, the technical scheme of the utility model is following:
Ring pressure-controlled type under balance pressure drilling casing valve; It is characterized in that; Comprise valve body; Said valve body is provided with the floating piston fluid cylinder structure of being made up of intercommunicating pore and floating piston lower chamber and casing annulus intercommunicating pore in sealing on valve body, fluid cylinder sealing, floating piston upper cavity, the floating piston, floating piston, floating piston shear pin, fluid cylinder overcoat, floating piston lower seal, floating piston lower chamber, floating piston upper cavity and the sleeve pipe, is provided with in the said floating piston fluid cylinder structure that the casing valve valve body of being made up of valve plate connecting rod bindiny mechanism, connecting rod, floating piston and floating piston connecting rod bindiny mechanism pushes away, pull-up structure; The top of said floating piston is the floating piston upper cavity, and the below of said floating piston is the floating piston lower chamber, and said floating piston is connected with valve plate through connecting rod.
The utility model is through reducing and improve the pressure of casing valve outer shroud empty well mouth; Regulate the pressure differential in casing annulus and the sleeve pipe; Run to bottom or top to drive the floating piston fluid cylinder, drive the connecting rod of push-and-pull valve plate, realize closing and opening of valve plate.When the floating piston fluid cylinder ran to the bottom, connecting rod pulling valve plate was descending, and valve plate is realized opening, and can carry out normal drillng operation this moment through casing valve.When the floating piston fluid cylinder ran to the top, it is up that connecting rod promotes valve plate, and valve plate is realized closing, this moment can the sleeve pipe more than casing valve in, carry out required operation.
The utility model had both been simplified the control system of valve plate switch, had simplified operation procedure simultaneously.Greatly improve the operating efficiency of under balance pressure drilling casing valve, further reduced the operating risk of under balance pressure drilling casing valve.
The valve plate of the casing valve of invention opens and closes the connecting rod that the control system comprises floating piston fluid cylinder and push-and-pull valve plate, is the key mechanism that realizes annular pressure control valve switching plate on the sleeve pipe valve body.Wherein, the floating piston fluid cylinder, upper cavity is communicated with the inner chamber on casing valve top, and lower chamber is communicated with the outer annular space of casing valve.Floating piston links to each other with connecting rod, and floating piston can move up and down in liquid cylinder, the valve body of push-and-pull simultaneously connecting rod.The connecting rod of valve body, an end is connected with floating piston, and the other end is connected with valve plate.When floating piston moved up and down, connecting rod pushed away or spurs valve plate, realized closing and opening of valve plate.
Description of drawings
Fig. 1 is the structural representation of ring pressure-controlled type under balance pressure drilling casing valve.
Wherein, 1. casing valve box, 2. valve body, 3. valve plate seat; 4. valve plate, 5. valve plate bindiny mechanism (valve plate is connected with the valve body), 6. valve plate connecting rod bindiny mechanism, 7. fluid cylinder sealing; 8. floating piston upper cavity, 9. connecting rod 10. seals on the floating piston, 11. floating pistons; 12. the floating piston shear pin, 13. floating piston connecting rod bindiny mechanisms, 14. fluid cylinder overcoats, 15. floating piston lower seals; 16. the casing valve pin thread, intercommunicating pore in the 17. floating piston lower chambers, 18. floating piston upper cavities and sleeve pipe, 19. floating piston lower chambers and casing annulus intercommunicating pore.
The specific embodiment
Ring pressure-controlled type under balance pressure drilling casing valve; Comprise valve body 2, valve body is provided with by the floating piston fluid cylinder structure that seals 10 on valve body 2, fluid cylinder sealing 7, floating piston upper cavity 8, the floating piston, intercommunicating pore 18 and floating piston lower chamber and casing annulus intercommunicating pore 19 are formed in floating piston 11, floating piston shear pin 12, fluid cylinder overcoat 14, floating piston lower seal 15, floating piston lower chamber 17, floating piston upper cavity and the sleeve pipe.Be provided with in the floating piston fluid cylinder structure that the casing valve valve body of being made up of valve plate connecting rod bindiny mechanism 6, connecting rod 9, floating piston 11 and floating piston connecting rod bindiny mechanism 13 pushes away, pull-up structure.The top of floating piston 11 is a floating piston upper cavity 8, and the below of floating piston 11 is a floating piston lower chamber 17, and floating piston 11 is connected with valve plate 4 through connecting rod 9.
To encircle pressure-controlled type under balance pressure drilling casing valve and be connected during sleeve pipe scurries, with the sleeve pipe G.I.H according to design attitude.The depth of setting of casing valve is limited by its body intensity, requires its annular space can not cementing simultaneously, and is following dark in the sleeve pipe of upper strata.In the casing annulus of casing valve, should preferentially keep clear water, low solid phase completion fluid, to guarantee that in follow-up drilling operation course the casing valve annular pressure is lower than casing valve sleeve pipe internal pressure.At the casing valve G.I.H, in cementing completion process, floating piston 11 remains at the bottom under the effect of sleeve pipe internal pressure and shear pin 12, and valve plate 4 is in opening.When needs are closed valve plate 4, with slush pump from annular space well head pressurization, to the casing valve annular pressure greater than casing valve sleeve pipe internal pressure and after cutting off shear pin 12, fluid cylinder floating piston 11 is up to the top, connecting rod 9 promotes valve plates 4 to closed condition.This moment can the sleeve pipe more than casing valve in, carry out required operation.When needs are opened valve plate 4; As long as the well head pressure of annular space is reduced to zero; Casing valve sleeve pipe internal pressure is all the time greater than casing valve annular space internal pressure at this moment, and floating piston 11 goes downwards to the bottom, and connecting rod 9 pulling valve plates 4 are to opening; Can carry out normal drillng operation this moment through casing valve, and valve plate 4 will be in opening all the time.The opening and closing of valve plate 4 are controlled through the well head pressure that increases and reduce casing annulus, can carry out according to the actual needs repeated multiple times of under balance pressure drilling.
Claims (1)
1. encircle pressure-controlled type under balance pressure drilling casing valve; It is characterized in that; Comprise valve body (2); Said valve body is provided with the floating piston fluid cylinder structure of being made up of intercommunicating pore (18) and floating piston lower chamber and casing annulus intercommunicating pore (19) in sealing (10), floating piston (11), floating piston shear pin (12), fluid cylinder overcoat (14), floating piston lower seal (15), floating piston lower chamber (17), floating piston upper cavity and the sleeve pipe on valve body (2), fluid cylinder sealing (7), floating piston upper cavity (8), the floating piston; Be provided with in the said floating piston fluid cylinder structure that the casing valve valve body of being made up of valve plate connecting rod bindiny mechanism (6), connecting rod (9), floating piston (11) and floating piston connecting rod bindiny mechanism (13) pushes away, pull-up structure; The top of said floating piston (11) is floating piston upper cavity (8); The below of said floating piston (11) is floating piston lower chamber (17), and said floating piston (11) is connected with valve plate (4) through connecting rod (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206235578U CN202117625U (en) | 2010-11-25 | 2010-11-25 | Annular pressure control type underbalance well casing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206235578U CN202117625U (en) | 2010-11-25 | 2010-11-25 | Annular pressure control type underbalance well casing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202117625U true CN202117625U (en) | 2012-01-18 |
Family
ID=45458698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206235578U Expired - Lifetime CN202117625U (en) | 2010-11-25 | 2010-11-25 | Annular pressure control type underbalance well casing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202117625U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706295A (en) * | 2020-07-14 | 2020-09-25 | 西南石油大学 | Radio electromagnetic wave direct-current control pressure-relief sleeve valve |
| CN114396243A (en) * | 2022-01-18 | 2022-04-26 | 西南石油大学 | High-pressure gas well completion method for gas drilling |
-
2010
- 2010-11-25 CN CN2010206235578U patent/CN202117625U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706295A (en) * | 2020-07-14 | 2020-09-25 | 西南石油大学 | Radio electromagnetic wave direct-current control pressure-relief sleeve valve |
| CN111706295B (en) * | 2020-07-14 | 2021-03-23 | 西南石油大学 | Radio electromagnetic wave direct-current control pressure-relief sleeve valve |
| CN114396243A (en) * | 2022-01-18 | 2022-04-26 | 西南石油大学 | High-pressure gas well completion method for gas drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |
|
| CX01 | Expiry of patent term |