CN103821478A - Plug valve with pressure balance function - Google Patents
Plug valve with pressure balance function Download PDFInfo
- Publication number
- CN103821478A CN103821478A CN201410079873.6A CN201410079873A CN103821478A CN 103821478 A CN103821478 A CN 103821478A CN 201410079873 A CN201410079873 A CN 201410079873A CN 103821478 A CN103821478 A CN 103821478A
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- plug
- upper cavity
- pressure balance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to a plug valve with a pressure balance function for gas drilling operation, and belongs to petroleum and gas drilling underground tools. The plug valve consists of a valve body, an upper valve seat, a lower valve seat, a rotary ball, a rotary knob and a pressure balance device, wherein the rotary ball is arranged in the valve body, and can rotate between the upper valve seat and the lower valve seat, an upper cavity and a lower cavity are communicated by the pressure balance device, the pressure balance device consists of a steel ball, a spring, a sealing plug, a seal ring, an inlet and an outlet, and the steel ball in the pressure balance device can automatically balance the pressure difference between the upper cavity and the lower cavity. The plug valve has the advantages that the pressure difference between the upper cavity and the lower cavity can be automatically adjusted by the spring and the steel ball, and the operation by a site operator is not needed; the structure is simple, and the implementation is easy.
Description
Technical field
The present invention relates to, for a kind of plug valve with equilibrium pressure effect under gas drilling operating mode, belong to oil and gas well drilling downhole equipment.
Background technology
Plug valve is widely used at oil and gas well drilling scene as jet-preventing tool in down-hole.The on-the-spot plug valve using comprises valve body, upper valve base, lower valve base, spiral and knob at present, and these component have jointly formed plug valve and guaranteed well control safety in situ of drilling well drill string.Along with the development of under-balanced drilling technology, described spiral, there being very difficult rotation under differential pressure conditions, causes plug valve switch motion normally.
In order to solve that spiral has pressure reduction between upper cavity and lower chamber and the problem that cannot open needs a kind of plug valve with equilibrium pressure effect, realize normal switch motion.
Summary of the invention
Object of the present invention, in order to overcome prior art deficiency, provides a kind of plug valve with equilibrium pressure effect, plays and regulates and balancing gas pressure effect.
Technical scheme of the present invention is:
A kind of plug valve with equilibrium pressure effect of the present invention, is made up of valve body, upper valve base, knob, spiral, lower valve base, lower chamber, upper cavity and pressure equaliser.Described spiral is arranged in valve body, between upper valve base and lower valve base, can rotate; Be communicated with lower chamber and upper cavity by pressure equaliser; Described pressure equaliser is made up of steel ball, spring, sealing-plug, sealing ring, entrance, outlet, and sealing-plug and valve body are threaded connection; Be placed in the pressure differential between steel ball energy autobalance lower chamber and the upper cavity in pressure equaliser, make spiral can not have pressure reduction and cannot normal switch move because of lower chamber and upper cavity.
The present invention has the following advantages:
1, the present invention can regulate the pressure differential between spiral upper cavity and lower chamber, and the switch motion of spiral is easily realized; 2, rely on spring and steel ball can automatically regulate the pressure differential between upper cavity and lower chamber, do not need field personnel's operation; 3, simple in structure, be easy to realize.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of plug valve with equilibrium pressure effect of the present invention;
Fig. 2 is pressure equaliser structural representation of the present invention.
In figure: 1. valve body, 2. upper valve base, 3. knob, 4. spiral, 5. lower valve base, 6. pressure equaliser, 7. lower chamber, 8. upper cavity, 9. steel ball, 10. spring, 11. sealing-plugs, 12. sealing rings, 13. entrances, 14. outlets.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
As shown in Figure 1 and Figure 2, a kind of plug valve with equilibrium pressure effect of the present invention, formed by valve body 1, upper valve base 2, knob 3, spiral 4, lower valve base 5, lower chamber 7, upper cavity 8 and pressure equaliser 6, described spiral 4 is arranged in valve body 1, between upper valve base 2 and lower valve base 5, can rotate; Be communicated with lower chamber 7 and upper cavity 8 by pressure equaliser 6; Described pressure equaliser 6 is made up of steel ball 9, spring 10, sealing-plug 11, sealing ring 12, entrance 13, outlet 14, and sealing-plug 11 is threaded connection with valve body 1; Be placed in steel ball in pressure equaliser 69 can autobalance lower chambers 7 and upper cavity 8 between pressure differential, make the spiral 4 can because of lower chamber 7 and upper cavity 8 not have pressure reduction and cannot normal switch action; The axis of valve body 1, upper valve base 2, lower valve base 5, lower chamber 7 and upper cavity 8 all overlaps.
In the time of drillng operation, spiral 4 is in full-gear, and upper cavity 8 is consistent with the pressure of lower chamber 7, and now pressure equaliser 6 is in closed condition.In the time that drilling well direct circulation stops or well kick occurs, carry out operation knob 3 with special spanner and drive spiral 4 half-twists cut-out drill string internal channels to play the effect of blowout prevention in drill string.If when carrying out kill job or again creeping into, pressure equaliser 6 is now in running order.Drilling medium in lower chamber 7 under high pressure conditions enters and promotes steel ball 9 Compress Springs 10 from the entrance 13 of pressure equaliser 6, now exporting 14 is communicated with entrance 13, pressure equaliser 6 has just been communicated with lower chamber 7 and upper cavity 8, pressure differential between balance two cavitys, until when the pressure balance of upper cavity 8 and lower chamber 7, compressed spring 10 will promote steel ball 9 and reset.Now, pressure balance between upper cavity 8 and lower chamber 7, is used special spanner just can realize the rotation of spiral 4, makes drill string internal channel in all-pass state, then carries out follow-up work.
Claims (1)
1. one kind has the plug valve of equilibrium pressure effect, formed by valve body (1), upper valve base (2), knob (3), spiral (4), lower valve base (5), lower chamber (7), upper cavity (8) and pressure equaliser (6), it is characterized in that: described spiral (4) is arranged in valve body (1), between upper valve base (2) and lower valve base (5), can rotate; Be communicated with lower chamber (7) and upper cavity (8) by pressure equaliser (6); Described pressure equaliser (6) is made up of steel ball (9), spring (10), sealing-plug (11), sealing ring (12), entrance (13), outlet (14), and sealing-plug (11) is threaded connection with valve body (1); Be placed in the pressure differential between steel ball (9) autobalance lower chamber (7) and the upper cavity (8) in pressure equaliser (6), make spiral (4) can not have pressure reduction and cannot normal switch move because of lower end and upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410079873.6A CN103821478A (en) | 2014-03-06 | 2014-03-06 | Plug valve with pressure balance function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410079873.6A CN103821478A (en) | 2014-03-06 | 2014-03-06 | Plug valve with pressure balance function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103821478A true CN103821478A (en) | 2014-05-28 |
Family
ID=50756741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410079873.6A Pending CN103821478A (en) | 2014-03-06 | 2014-03-06 | Plug valve with pressure balance function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103821478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236278A (en) * | 2018-08-21 | 2019-01-18 | 中国石油天然气股份有限公司 | Comprehensive protection device for underground test instrument |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB622404A (en) * | 1946-04-04 | 1949-05-02 | Baker Oil Tools Inc | Cementing casings and the like in wells |
| US5826652A (en) * | 1997-04-08 | 1998-10-27 | Baker Hughes Incorporated | Hydraulic setting tool |
| CN2821148Y (en) * | 2005-04-25 | 2006-09-27 | 西南石油学院 | Double path cock valve |
| CN201396114Y (en) * | 2009-05-13 | 2010-02-03 | 中国石油集团西部钻探工程有限公司吐哈钻井工艺研究院 | Plug valve special for under-balanced drilling |
| CN202971981U (en) * | 2012-12-11 | 2013-06-05 | 四川精控阀门制造有限公司 | Pressure balance type plug valve |
-
2014
- 2014-03-06 CN CN201410079873.6A patent/CN103821478A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB622404A (en) * | 1946-04-04 | 1949-05-02 | Baker Oil Tools Inc | Cementing casings and the like in wells |
| US5826652A (en) * | 1997-04-08 | 1998-10-27 | Baker Hughes Incorporated | Hydraulic setting tool |
| CN2821148Y (en) * | 2005-04-25 | 2006-09-27 | 西南石油学院 | Double path cock valve |
| CN201396114Y (en) * | 2009-05-13 | 2010-02-03 | 中国石油集团西部钻探工程有限公司吐哈钻井工艺研究院 | Plug valve special for under-balanced drilling |
| CN202971981U (en) * | 2012-12-11 | 2013-06-05 | 四川精控阀门制造有限公司 | Pressure balance type plug valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236278A (en) * | 2018-08-21 | 2019-01-18 | 中国石油天然气股份有限公司 | Comprehensive protection device for underground test instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10584561B2 (en) | Dirty fluid pressure regulator and control valve | |
| EP2216500A2 (en) | Hydraulic lockout device for pressure controlled well tools | |
| US10087712B2 (en) | Pressure actuated downhole tool | |
| RU170983U1 (en) | MECHANICAL DEVICE FOR PROTECTION OF THE FORMATION | |
| CN104662255A (en) | Pressure testing valve and method of using the same | |
| CA2924015A1 (en) | Improved mandrel-less launch toe initiation sleeve | |
| AU2015284356A1 (en) | Hydraulic lock compensating dummy valve | |
| CN103821478A (en) | Plug valve with pressure balance function | |
| US20150083421A1 (en) | Mandrel-less Launch Toe Initiation Sleeve (TIS) | |
| US20200318750A1 (en) | Enhanced design for plug valve | |
| CN204163679U (en) | Multifunctional high pressure tubing plug | |
| US10309194B2 (en) | Downhole fluid valve | |
| CN105089601B (en) | Infinite-stage sliding sleeve and process method | |
| CN208718592U (en) | Underground helicoid hydraulic motor antiseize device | |
| CN203808915U (en) | Oil pipe hanger plugging device | |
| RU2274728C1 (en) | Well head sealing device | |
| CN207420531U (en) | A kind of bore hole wireline logging well control system | |
| MX2017014861A (en) | Method and apparatus for sealing an annulus around a drill-pipe when drilling down-hole. | |
| CN204113214U (en) | Oil sleeve communicating switch valve | |
| CN106948780A (en) | A kind of screw drilling tool motor operting differential pressure control valve and its control method | |
| US9903196B2 (en) | Pressure test and actuation tool and method | |
| CN104153714A (en) | Matching tool for controlling plugging of oil pipe of oil well | |
| RU2539053C1 (en) | Unit for dual operation of several production facilities at one well (versions) and shutdown valve of revolving type | |
| CN202718659U (en) | Full-bore type blowout prevention valve | |
| RU2623750C1 (en) | Method for underground well repair to replace submersible equipment and exclude influence of well-killing fluid on productive plast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140528 |