CN102071910A - Low-torque kelly cock valve - Google Patents
Low-torque kelly cock valve Download PDFInfo
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- CN102071910A CN102071910A CN2009102179180A CN200910217918A CN102071910A CN 102071910 A CN102071910 A CN 102071910A CN 2009102179180 A CN2009102179180 A CN 2009102179180A CN 200910217918 A CN200910217918 A CN 200910217918A CN 102071910 A CN102071910 A CN 102071910A
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Abstract
The invention relates to a blowout prevention tool in a drilling tool, in particular to a low-torque kelly cock valve. The cock valve comprises a valve body, a combined valve seat, a metal valve seat, a split collar with a supporting sleeve, a valve ball, a valve rod, sliding bearing seats, a rotary switch and a positioning pin, wherein the combined valve seat and the metal valve seat are arranged in the cavity of the valve body; the split collar with the supporting sleeve is arranged on one side close to the metal valve seat; the valve ball is arranged in the cavity of the valve body and between the combined valve seat and the metal valve seat; the valve body is symmetrically provided with the sliding bearing seats in the radial direction; the valve rod which is arranged in a sliding bearing is connected with one end of the valve ball; the rotary switch which is arranged in a sliding bearing seat is connected with the other end of the valve ball; and the combined valve seat is positioned by the positioning pin which is arranged on the valve body at the position corresponding to the combined valve seat. The cock valve has the advantages of simple and rational structure, good sealing effect, flexible opening and closing action, long service life and the like and is safe and reliable.
Description
Technical field
The present invention relates to blowout prevention instrument in a kind of drilling tool, a kind of specifically low moment of torsion kelly cock.
Background technology
Kelly cock is the hand control valve in the drill string circulating system, is one of effective tool that prevents blowout.Kelly cock divides top kelly cock and bottom kelly cock.The top kelly cock is connected between water tap lower end and the kelly bar upper end.The bottom kelly cock is connected between the lower end of kelly bar lower end and drilling rod upper end or kelly saver sub.The kelly cock operation is very simple, rotates 90 degree with special spanner by the indication requirement and can realize opening or closing.In the drilling and repairing well operation, for fear of the generation of blowout serious accident, all should be at kelly bar upper/lower terminal winding kelly cock.
In recent years, seal failure between spool and the valve seat frequently takes place in plug valve, rotating dog can not rotate, the valve seat thorn is bad, the spool long-term immobilization, the sealing surface of seat corrosion is serious, and knob can not rotate, the fracture of plug valve body, can't realize switch motion of plug valve or the like, produce to the oil field and bring enormous economic loss, when serious even bring out gas blowout accident.
Because what traditional plug valve adopted is the structure of ball-type, the phenomenon of not opening after often occurring when tubing string pressure is big closing, the workman just can't carry out next step operation like this, thereby can form safe hidden danger, causes the generation of accident.
Summary of the invention
The switch motion that the objective of the invention is to provide a kind of simple and reasonable, good sealing effect, plug valve flexibly, long service life, safe and reliable low moment of torsion kelly cock.
The object of the present invention is achieved like this, this plug valve comprises valve body, stack valve seat, metal seat valve, the split collar that has support set, valve ball, valve rod, plain bearing housing, revolution switch, alignment pin, described stack valve seat and metal seat valve are arranged in the valve body cavity, the split collar that has support set is arranged near metal seat valve one side, described valve ball is arranged in the valve body cavity, between stack valve seat and the metal seat valve, radial symmetric at valve body is provided with plain bearing housing, the valve rod that is arranged in the sliding bearing is connected with an end of valve ball, the revolution switch that is arranged in the plain bearing housing is connected with the other end of valve ball, and the alignment pin that described corresponding stack valve seat position is arranged on the valve body positions stack valve seat.
Have through hole on the described valve ball, being connected between valve rod and revolution switch and the valve ball adopted the eccentric form of structure that connects.
The endoporus that the endoporus of described stack valve seat and metal seat valve is set for the eccentric.
The present invention has the following advantages and good effect:
1, owing to adopt the self-sealing packing mechanism of elastic rubbery body, realize the sealing of plug valve, therefore, do not have other pre-tightening apparatus, so do not exist drilling fluid impurity to accumulate in glade plane space to cause stuck, problem such as be not closed completely.
2, can conveniently under the whole operating modes of drilling and repairing well easily open and close.
3, realize (low pressure, high pressure operating mode) positiver sealing under the full operating mode.
4, because adopt the cam eccentric structure, when plug valve opens or cuts out, the ball seal face hightails sealing surface of seat, thus it is little to have reached wearing and tearing, long service life.
Description of drawings
Fig. 1 is low moment of torsion kelly cock overall structure schematic diagram.
Fig. 2 is an A-A cut-away view of the present invention.
Fig. 3,4 is stack valve seat structural representation of the present invention.
Fig. 5,6 is metal seat valve structural representation of the present invention.
The specific embodiment
By accompanying drawing 1, shown in 2: this plug valve comprises valve body 1, stack valve seat 2, metal seat valve 3, the split collar 5 that has support set 4, valve ball 6, valve rod 7, sliding bearing 8,8-1, revolution switch 9, alignment pin 10, described stack valve seat 2 and metal seat valve 3 are arranged in valve body 1 cavity, the split collar 5 that has support set 4 is arranged near metal seat valve 3 one sides, described valve ball 6 is arranged in valve body 1 cavity, between stack valve seat 2 and the metal seat valve 3, radial symmetric at valve body 1 is provided with plain bearing housing 8,8-1, the valve rod 7 that is arranged in the sliding bearing 8-1 is connected with an end of valve ball 6, the revolution switch 9 that is arranged in the sliding bearing 8 is connected with the other end of valve ball 6, and 10 pairs of stack valve seat 2 of alignment pin that described corresponding stack valve seat 2 positions are arranged on the valve body 1 position.
Have through hole 11 on the described valve ball 6, being connected between valve rod 7 and revolution switch 9 and the valve ball 6 adopted the eccentric form of structure that connects.
Shown in accompanying drawing 3,4,5,6: the endoporus that the endoporus of described stack valve seat 2 and metal seat valve 3 is set for the eccentric.
Operating principle of the present invention: at first utilize the self-sealing packing mechanism of stack valve seat 2 elastic rubbery bodies 12 to reduce the seal pressure of plug valve stack valve seat 2 significantly, and, realize positiver sealing to high-pressure medium.Because the significantly reduction of seal pressure, so the open and close torque of plug valve also significantly reduces.Secondly, being connected between valve rod 7 and revolution switch 9 and the valve ball 6 adopted cam eccentric type form of structure, contacting between stack valve seat 2 and metal seat valve 3 and the valve ball 6 adopted eccentric form, and promptly valve ball 6 center lines are with respect to valve body disalignment certain distance, the eccentric certain distance of sealing surface of seat.
When valve rod 7 around center line 13 turn clockwise 90 °, then valve ball 6 also revolves thereupon and turn 90 degrees and coincide with stack valve seat 2 and metal seat valve 3 sealing surfaces.When moment that the moment of friction between sealing pair and valve rod 7 seal friction moment sums form greater than pressure medium, plug valve will reach positiver sealing.Owing to plug valve employing cam eccentric structure form, when plug valve is opened, valve ball 6 hightails stack valve seat 2 and metal seat valve 3 sealing surfaces.When plug valve cut out, valve ball 6 coincide rapidly with stack valve seat 2 and metal seat valve 3 sealing surfaces.Thereby it is little to have reached the unlatching moment of torsion, closes tight purpose.In addition, because low moment of torsion kelly cock adopts fixedly spherical structure, therefore fixedly very big radial effect power is being born in the support of ball, can produce very big frictional force during rotation, for reducing this frictional force, the plain bearing housing 8 that special low-friction coefficient is installed in valve rod 7 and revolution switch 9 supports place reduces friction.Further reduce the kelly cock opening of valves or the moment of torsion when closing.
Claims (3)
1. one kind low moment of torsion kelly cock, it is characterized in that: this plug valve comprises valve body (1), stack valve seat (2), metal seat valve (3), the split collar (5) that has support set (4), valve ball (6), valve rod (7), plain bearing housing (8,8-1), revolution switch (9), alignment pin (10), described stack valve seat (2) and metal seat valve (3) are arranged in valve body (1) cavity, the split collar (5) that has support set (4) is arranged near metal seat valve (3) one sides, described valve ball (6) is arranged in valve body (1) cavity, between stack valve seat (2) and the metal seat valve (3), radial symmetric at valve body (1) is provided with plain bearing housing (8,8-1), the valve rod (7) that is arranged in the sliding bearing (8-1) is connected with an end of valve ball (6), the revolution switch (9) that is arranged in the sliding bearing (8) is connected with the other end of valve ball (6), and the alignment pin (10) that described corresponding stack valve seat (2) position is arranged on the valve body (1) positions stack valve seat (2).
2. a kind of low moment of torsion kelly cock according to claim 1 is characterized in that: have through hole (11) on the described valve ball (6), being connected between valve rod (7) and revolution switch (9) and the valve ball (6) adopted the eccentric form of structure that connects.
3. a kind of low moment of torsion kelly cock according to claim 1 is characterized in that: the endoporus that the endoporus of described stack valve seat (2) and metal seat valve (3) is set for the eccentric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102179180A CN102071910A (en) | 2009-11-19 | 2009-11-19 | Low-torque kelly cock valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102179180A CN102071910A (en) | 2009-11-19 | 2009-11-19 | Low-torque kelly cock valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102071910A true CN102071910A (en) | 2011-05-25 |
Family
ID=44030646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102179180A Pending CN102071910A (en) | 2009-11-19 | 2009-11-19 | Low-torque kelly cock valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102071910A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742106A (en) * | 2014-01-04 | 2014-04-23 | 黑龙江北方双佳钻采机具有限责任公司 | Openable kelly cock valve with high pressure difference |
| CN104763375A (en) * | 2014-01-04 | 2015-07-08 | 盐城市华谊石油机械有限公司 | High-strength low-torque plug valve |
| CN106703749A (en) * | 2015-07-23 | 2017-05-24 | 牡丹江鑫北方石油钻具有限责任公司 | Novel plug valve with lubricating and filling functions |
| CN106894788A (en) * | 2017-03-16 | 2017-06-27 | 中国石油天然气集团公司 | Deepwater drilling drill pipe valve |
| CN107387002A (en) * | 2017-08-31 | 2017-11-24 | 成都西南石大石油工程技术有限公司 | A kind of Double channel plug valve |
| CN110017112A (en) * | 2019-04-12 | 2019-07-16 | 淮安市井神钻采机具有限公司 | A kind of interior jet-preventing tool of Novel composite metal material sealing |
| CN110107255A (en) * | 2019-06-17 | 2019-08-09 | 牡丹江石油工具有限责任公司 | Kelly bar is without the switchable plug valve of pressure difference |
| CN113503142A (en) * | 2021-07-28 | 2021-10-15 | 刘婉君 | Kelly cock valve for marine oil field drill |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4697786A (en) * | 1984-06-21 | 1987-10-06 | Itt Corporation | Eccentric plug valve |
| EP0461294A1 (en) * | 1990-06-15 | 1991-12-18 | Broen Armatur A/S | Stop valve |
| WO1997013398A2 (en) * | 1996-12-30 | 1997-04-17 | T.M.B. Pensioen B.V. | Metal-to-metal rotatory valve systems without sealing rings |
| CN200943466Y (en) * | 2006-08-30 | 2007-09-05 | 四川石油管理局钻采工艺技术研究院 | Low torque kelly bar cock valve |
| CN201193503Y (en) * | 2008-05-22 | 2009-02-11 | 马宝忠 | Spring balance type kelly plug valve |
| CN201546671U (en) * | 2009-11-19 | 2010-08-11 | 李新利 | Low-torque kelly cock valve |
-
2009
- 2009-11-19 CN CN2009102179180A patent/CN102071910A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4697786A (en) * | 1984-06-21 | 1987-10-06 | Itt Corporation | Eccentric plug valve |
| EP0461294A1 (en) * | 1990-06-15 | 1991-12-18 | Broen Armatur A/S | Stop valve |
| WO1997013398A2 (en) * | 1996-12-30 | 1997-04-17 | T.M.B. Pensioen B.V. | Metal-to-metal rotatory valve systems without sealing rings |
| CN200943466Y (en) * | 2006-08-30 | 2007-09-05 | 四川石油管理局钻采工艺技术研究院 | Low torque kelly bar cock valve |
| CN201193503Y (en) * | 2008-05-22 | 2009-02-11 | 马宝忠 | Spring balance type kelly plug valve |
| CN201546671U (en) * | 2009-11-19 | 2010-08-11 | 李新利 | Low-torque kelly cock valve |
Non-Patent Citations (1)
| Title |
|---|
| 韩安伟: "弹性座封偏心旋塞阀的应用与研究", 《通用机械》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742106A (en) * | 2014-01-04 | 2014-04-23 | 黑龙江北方双佳钻采机具有限责任公司 | Openable kelly cock valve with high pressure difference |
| CN104763375A (en) * | 2014-01-04 | 2015-07-08 | 盐城市华谊石油机械有限公司 | High-strength low-torque plug valve |
| CN103742106B (en) * | 2014-01-04 | 2016-07-06 | 黑龙江北方双佳钻采机具有限责任公司 | The switchable kelly cock of High Pressure Difference |
| CN106703749B (en) * | 2015-07-23 | 2019-02-12 | 牡丹江鑫北方石油钻具有限责任公司 | A kind of Novel plug valve with lubrication and filling function |
| CN106703749A (en) * | 2015-07-23 | 2017-05-24 | 牡丹江鑫北方石油钻具有限责任公司 | Novel plug valve with lubricating and filling functions |
| CN106894788A (en) * | 2017-03-16 | 2017-06-27 | 中国石油天然气集团公司 | Deepwater drilling drill pipe valve |
| CN106894788B (en) * | 2017-03-16 | 2023-07-25 | 中国石油天然气集团公司 | Drill rod valve for deep water drilling |
| CN107387002A (en) * | 2017-08-31 | 2017-11-24 | 成都西南石大石油工程技术有限公司 | A kind of Double channel plug valve |
| CN110017112A (en) * | 2019-04-12 | 2019-07-16 | 淮安市井神钻采机具有限公司 | A kind of interior jet-preventing tool of Novel composite metal material sealing |
| CN110017112B (en) * | 2019-04-12 | 2021-05-25 | 淮安市井神钻采机具有限公司 | Composite metal material seals internal blowout prevention instrument |
| CN110107255A (en) * | 2019-06-17 | 2019-08-09 | 牡丹江石油工具有限责任公司 | Kelly bar is without the switchable plug valve of pressure difference |
| CN110107255B (en) * | 2019-06-17 | 2021-06-18 | 牡丹江石油工具有限责任公司 | Kelly bar non-differential pressure switchable plug valve |
| CN113503142A (en) * | 2021-07-28 | 2021-10-15 | 刘婉君 | Kelly cock valve for marine oil field drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110525 |