CN2793472Y - Pressure-balanced cock with square rod - Google Patents
Pressure-balanced cock with square rod Download PDFInfo
- Publication number
- CN2793472Y CN2793472Y CN 200520033245 CN200520033245U CN2793472Y CN 2793472 Y CN2793472 Y CN 2793472Y CN 200520033245 CN200520033245 CN 200520033245 CN 200520033245 U CN200520033245 U CN 200520033245U CN 2793472 Y CN2793472 Y CN 2793472Y
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- Prior art keywords
- valve
- valve body
- pressure
- control valve
- taper
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- Expired - Fee Related
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Abstract
The utility model relates to a pressure-balanced cock with a kelly rod, which comprises a valve body, a front valve seat, a back valve seat, a sealing ring and a globe valve core connected with a rotary shaft by a crossing section. The utility model is characterized in that the valve body is provided with a pressure balance path of which two ports are separately communicated with a front valve cavity and a back valve cavity of the globe valve core, and a control valve is arranged on the pressure balance path. The utility model has the advantages of simple structure, easy manufacture and convenient operation. The utility model can be easily and conveniently opened in the well killing job, labor and time are saved, and work efficiency is enhanced.
Description
(1), affiliated technical field
The utility model relates to a kind of pipe valve, particularly a kind of kelly cock that is used to prevent blowout in oil drilling.
(2), technical background
Existing kelly cock generally comprises and includes valve body, preceding valve seat, rear valve base, seal ring and the spherical valve core that is connected with rotatingshaft by the cross joint, and it is to be contained in the upper and lower interior blowout hookup of kelly bar.In carrying out drilling operation course, when arriving oil, gas-bearing formation, tend to produce oil, the air-flow of high pressure, upwards spring up by drill pipe bore, in order to prevent blowout, must close kelly cock, gush with prevention.Then connect kill-job equipment, carry out kill job, open kelly cock this moment again, because kelly cock is closed, form very big pressure reduction between the low pressure of the high pressure in the back valve pocket of spherical valve core bottom and the preceding valve pocket on top, make the very big pressure of generation between spherical valve core and the preceding valve seat, when rotating shaft, because the frictional force that huge pressure produces is very big, be difficult to rotate spherical valve core, kelly cock can't be opened.Traditional practice is to suppress towards drill pipe bore from last with kill-job equipment, and the pressure before making in the valve pocket increases, and must estimate how many borehole pressures is simultaneously, and the pressure before making in the valve pocket is increased to back valve pocket internal pressure in a basic balance, just can open stopcock.Existing kelly cock just can only be opened by above-mentioned method, the very difficulty that operates, and time-consuming taking a lot of work.
(3), summary of the invention
The purpose of this utility model just provides a kind of pressure balance type kelly cock simple in structure, easy and simple to handle, and when kill job, it can be opened like a cork, has improved working efficiency.
The purpose of this utility model is to realize by such technological scheme, it includes valve body, preceding valve seat, rear valve base, seal ring and the spherical valve core that is connected with rotatingshaft by the cross joint, it is characterized in that: valve body is provided with a pressure equalisation passage, the two-port of this pressure equalisation passage communicates with the preceding valve pocket and the back valve pocket of spherical valve core front and back respectively, and pressure equalisation passage is provided with control valve.The utility model is work like this: when drillng operation, control valve is in closed condition, makes pressure equalisation passage obstructed, adjusts spherical valve core by rotatingshaft, makes the utility model be in opening state; When drilling well produces well kick, adjust spherical valve core by rotatingshaft at once, make the utility model be in closed condition, prevent blowout; In the time will carrying out kill job, open control valve earlier, allow pressure equalisation passage that the preceding valve pocket of spherical valve core front and back and back valve pocket are communicated with each other, high pressure in the back valve pocket is by pressure equalisation passage valve pocket supercharging forward, in a basic balance each other to the pressure of spherical valve core in preceding valve pocket and back valve pocket, at this moment, just can adjust spherical valve core very like a cork, open the utility model easily by rotatingshaft.
Owing to adopted technique scheme, the utlity model has simple in structure, easy to manufacture and easy to operate advantage, when kill job, it can be opened easily, and is time saving and energy saving, has improved working efficiency.
(4), description of drawings
Description of drawings of the present utility model is as follows:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of control valve.
Among the figure: 1. valve body; 2. preceding valve seat; 3. rear valve base; 4. seal ring; 5. cross saves; 6. rotatingshaft; 7. spherical valve core; 8. pressure equalisation passage; 9. preceding valve pocket; 10. valve pocket after; 11. control valve; 12. control valve body; 13. taper valve core; 14. valve pocket; 15. flowing hole; 16. valve port; 17. notch; 18. seal ring; 19. seal ring.
(5), embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, the utility model includes valve body 1, preceding valve seat 2, rear valve base 3, seal ring 4 and saves 5 spherical valve cores 7 that are connected with rotatingshaft 6 by cross, it is characterized in that: valve body 1 is provided with a pressure equalisation passage 8, the two-port of this pressure equalisation passage 8 communicates with the preceding valve pocket 9 and the back valve pocket 10 of spherical valve core 7 front and back respectively, and pressure equalisation passage 8 is provided with control valve 11.The utility model is work like this: when drillng operation, control valve 11 is in closed condition, makes pressure equalisation passage 8 obstructed, adjusts spherical valve core 7 by rotatingshaft 6, makes the utility model be in opening state; When drilling well produces well kick, adjust spherical valve core 7 by rotatingshaft 6 at once, make the utility model be in closed condition, prevent blowout; In the time will carrying out kill job, open control valve 11 earlier, allow pressure equalisation passage 8 that the preceding valve pocket 9 of spherical valve core front and back and back valve pocket 10 are communicated with each other, high pressure in the back valve pocket 10 is by pressure equalisation passage 8 valve pocket 9 superchargings forward, in a basic balance each other to the pressure of spherical valve core 7 in preceding valve pocket 9 and back valve pocket 10, at this moment, just can adjust spherical valve core 7 very like a cork, open the utility model easily by rotatingshaft 6.
As shown in Figure 2, control valve 11 can include control valve body 12, taper valve core 13, be positioned at valve body 1 and be provided with valve pocket 14 with control valve body 12 that valve body 1 is threaded, control valve body 12 is provided with the flowing hole 15 that pressure equalisation passage 8 is communicated with valve pocket 14, the taper valve core 13 that front end is taper passes control valve body 12 versatilely to valve pocket 14, the rearward end of taper valve core 13 and control valve body 12 are threaded, control valve body 12 is provided with the valve port 16 that pressure equalisation passage 8 is communicated with valve pocket 14, the size of valve port 16 matches with the front end of taper valve core 13, the rear end of taper valve core 13 is provided with the notch of being convenient to rotate 17, between taper valve core 13 and the control valve body 12 seal ring 18 is set, between control valve body 12 and the valve body 1 seal ring 19 is set.This control valve 11 is like this work: when needs are closed, by the light rotation conic spool 13 of notch 17, make the front end of taper valve core 13 block valve port 16, at this moment, control valve 11 is in closed condition; When needs are opened, by the light rotation conic spool 13 of notch 17, make the front end of taper valve core 13 leave valve port 16, at this moment, control valve 11 is in opening state.
Claims (2)
1. pressure balance type kelly cock, include valve body (1), preceding valve seat (2), rear valve base (3), seal ring (4) and the spherical valve core (7) that is connected with rotatingshaft (6) by cross joint (5), it is characterized in that: valve body (1) is provided with a pressure equalisation passage (8), the two-port of this pressure equalisation passage (8) communicates with the preceding valve pocket (9) and the back valve pocket (10) of spherical valve core (7) front and back respectively, and pressure equalisation passage (8) is provided with control valve (11).
2. pressure balance type kelly cock as claimed in claim 1, it is characterized in that: control valve (11) includes control valve body (12), taper valve core (13), be positioned at valve body (1) and be provided with valve pocket (14) with control valve body (12) that valve body (1) is threaded, control valve body (12) is provided with the flowing hole (15) that pressure equalisation passage (8) is communicated with valve pocket (14), the taper valve core (13) that front end is taper passes control valve body (12) versatilely to valve pocket (14), the rearward end of taper valve core (13) and control valve body (12) are threaded, control valve body (12) is provided with the valve port (16) that pressure equalisation passage (8) is communicated with valve pocket (14), the size of valve port (16) matches with the front end of taper valve core (13), the rear end of taper valve core (13) is provided with the notch of being convenient to rotate (17), between taper valve core (13) and the control valve body (12) seal ring (18) is set, between control valve body (12) and the valve body (1) seal ring (19) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033245 CN2793472Y (en) | 2005-02-06 | 2005-02-06 | Pressure-balanced cock with square rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033245 CN2793472Y (en) | 2005-02-06 | 2005-02-06 | Pressure-balanced cock with square rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2793472Y true CN2793472Y (en) | 2006-07-05 |
Family
ID=36820617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520033245 Expired - Fee Related CN2793472Y (en) | 2005-02-06 | 2005-02-06 | Pressure-balanced cock with square rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2793472Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481437A (en) * | 2014-12-15 | 2015-04-01 | 广汉川油井控装备有限公司 | Under-pressure low-torque square drill rod plug valve |
| CN104963654A (en) * | 2015-06-09 | 2015-10-07 | 中国石油化工股份有限公司 | Labor-saving plug valve for oil well work |
| CN105003682A (en) * | 2015-07-30 | 2015-10-28 | 盐城市大冈石油工具厂有限责任公司 | Pressure-regulating self-opened plug valve |
| CN109488783A (en) * | 2018-12-27 | 2019-03-19 | 成都海猛石油机械有限公司 | A kind of switch cock valve with pressure and application method |
| CN117005819A (en) * | 2023-10-07 | 2023-11-07 | 牡丹江通用石油工具有限公司 | Kelly no-pressure-difference switchable plug valve |
-
2005
- 2005-02-06 CN CN 200520033245 patent/CN2793472Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481437A (en) * | 2014-12-15 | 2015-04-01 | 广汉川油井控装备有限公司 | Under-pressure low-torque square drill rod plug valve |
| CN104963654A (en) * | 2015-06-09 | 2015-10-07 | 中国石油化工股份有限公司 | Labor-saving plug valve for oil well work |
| CN105003682A (en) * | 2015-07-30 | 2015-10-28 | 盐城市大冈石油工具厂有限责任公司 | Pressure-regulating self-opened plug valve |
| CN105003682B (en) * | 2015-07-30 | 2017-06-30 | 盐城市大冈石油工具厂有限责任公司 | Pressure regulation self-opening type plug valve |
| CN109488783A (en) * | 2018-12-27 | 2019-03-19 | 成都海猛石油机械有限公司 | A kind of switch cock valve with pressure and application method |
| CN117005819A (en) * | 2023-10-07 | 2023-11-07 | 牡丹江通用石油工具有限公司 | Kelly no-pressure-difference switchable plug valve |
| CN117005819B (en) * | 2023-10-07 | 2024-01-09 | 牡丹江通用石油工具有限公司 | Kelly no-pressure-difference switchable plug valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060705 |