CN102071909A - Low-torque upper kelly cock valve - Google Patents
Low-torque upper kelly cock valve Download PDFInfo
- Publication number
- CN102071909A CN102071909A CN2009102179176A CN200910217917A CN102071909A CN 102071909 A CN102071909 A CN 102071909A CN 2009102179176 A CN2009102179176 A CN 2009102179176A CN 200910217917 A CN200910217917 A CN 200910217917A CN 102071909 A CN102071909 A CN 102071909A
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- valve
- wedge cone
- cock
- rod
- valve body
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Abstract
The invention relates to a blowout prevention tool in a drilling tool, in particular to a low-torque upper kelly cock valve. The cock valve comprises a valve body, an upper valve seat, a lower valve seat, a split collar with a supporting sleeve, a wedge cone, spherical valve flaps, a valve rod, a guide rod, a rotary nut and a rail pin, wherein the upper valve seat and the lower valve seat are arranged inside the valve body; the wedge cone of which the two sides are provided with the spherical valve flaps is arranged between the upper valve seat and the lower valve seat; the guide rod is connected with the upper surface of the wedge cone on a longitudinal through hole of the valve body; the valve rod is connected with the lower surface of the wedge cone; the valve rod is connected with the rotary nut; and a guide part on the through hole of the valve body is provided with the rail pin. The cock valve has small opening and closing torque, prevents a sealing surface from being worn and is flexibly operated. Since a medium in a kelly uniformly passes through the surface of the spherical valve flaps and is decelerated at a constant speed when the spherical valve flaps leave the valve seats during the opening of the valve, the cock valve can be conveniently opened under a high pressure condition without a bypass; and the local erosion of the surface of the valve seat by the medium which passes through at a high speed is reduced, and the service life of the cock valve is long.
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 upper 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 upper kelly cock valve.
The object of the present invention is achieved like this, this plug valve comprises valve body, upper valve base, valve seat, the split collar that has support set, wedge cone, globe disk, valve rod, guide peg, swivel nut, track pin, described upper valve base and lower valve base are arranged on the inside of valve body, the wedge cone that both sides are provided with globe disk is contained between upper valve base and the lower valve base, on the longitudinal hole of valve body, be connected with guide peg above the wedge cone, be connected with valve rod below the wedge cone, valve rod is connected with swivel nut, and the guiding position is provided with track pin on the through hole of valve body.
Described wedge cone links by the dovetail groove on it with the globe disk of both sides, and three parts constitute combination valve core, and its sphere of the globe disk of combination valve core both sides is sealing surface; Have dovetail groove on the globe disk, have the dovetail guide with dovetail groove coupling on the wedge cone, wedge cone and flap can be by the slips that cooperatively interacts of dovetail groove on it and dovetail guide.
Be processed with trapezoidal thread on the described valve rod and cooperate and form worm drive with swivel nut.
Be milled with accurate helicla flute track on the described guide peg.
The present invention has the following advantages and good effect:
(1), when the low moment of torsion upper kelly cock of product of the present invention opens and closes the Combined ball valve body sealing surface with the complete disengaged condition of sealing surface of seat under carry out, open and close that moment is little, sealing surface does not have wearing and tearing, flexible operation.Simultaneously because when opening, the medium when ball clack is lifted off a seat in the drilling rod along the ball clack surface evenly by and at the uniform velocity step-down, so need not set up bypass during high pressure and just can open easily; And reduced medium at a high speed by the time to the local erosion of valve base surface, long service life.
(2), product of the present invention is by mechanical force sealing, changed traditional cock and relied on pressure medium and initial tension of spring to realize the characteristics of sealing, has two way seal function reliably.
(3), product of the present invention can the dual fail-safe self-locking.Be the self-locking of screw thread and the self-locking at wedge cone wedge angle, safe and reliable.
Description of drawings
Fig. 1 is low moment of torsion upper kelly cock valve overall structure schematic diagram.
Fig. 2 is combination valve core of the present invention, valve rod and guide peg syndeton schematic diagram.
Fig. 3 is connected the A-A cut-away view for dovetail groove of the present invention with dovetail guide.
The specific embodiment
Shown in accompanying drawing 1: this plug valve comprises valve body 1, upper valve base 2, lower valve base 3, the split collar 5 that has support set 4, wedge cone 6, globe disk 7, valve rod 8, guide peg 9, swivel nut 10, track pin 11, described upper valve base 2 and lower valve base 3 are arranged on the inside of valve body 1, the wedge cone 6 that both sides are provided with globe disk 7 is contained between upper valve base 2 and the lower valve base 3, on the longitudinal hole of valve body 1, be connected with guide peg 9 above the wedge cone 6, be connected with valve rod 8 below the wedge cone 6, valve rod 8 is connected with swivel nut 10, and the guiding position is provided with track pin 11 on the through hole of valve body 1.
Shown in accompanying drawing 2,3: described wedge cone 6 links by the dovetail groove 12 on it with the globe disk 7 of both sides, and three parts constitute combination valve core, and globe disk 7 its spheres of combination valve core both sides are sealing surface 13; Have dovetail groove 12 on the globe disk 7, have the dovetail guide 14 with dovetail groove 12 coupling on the wedge cone 6, wedge cone 6 and flap 7 can be by the slips that cooperatively interacts of dovetail groove on it 12 and dovetail guide 14.
Be processed with trapezoidal thread on the described valve rod 8 and cooperate and form worm drive with swivel nut 10.
Be milled with accurate helicla flute track 15 on the described guide peg 9.
Have through hole 16 on the described wedge cone 6.
The operating principle of upper kelly cock of the present invention is that the principle of cam makes the combination valve spheroid break away from sealing surface of seat in rotary course, ball clack is pushed to valve seat after being rotated in place again and is realized sealing.
The course of work: when combination valve core is in fully open position, rotate counterclockwise swivel nut 10 with spanner, when driving combination valve core in valve rod 8, guide peg 9 and the valve pocket and pressing track 15 half-twists on the guide peg, valve rod 8, guide peg 9 and combination valve core are subjected to track pin 11 stop bits, rotation can not be continued, the motion that wedge cone 6 makes progress as straight line can only be driven.Under the effect on inclined-plane, wedge cone 6 both sides, two ball clacks 7 that will match with the inclined-plane strut presses to lower valve base 2,3 realization sealings, combination valve core contract fully.
When combination valve core is in the contract fully position, clockwise rotate swivel nut 10 with spanner, driving valve rod 8, guide peg 9 and wedge cone 6 moves downward as straight line, under the effect of inclined-plane dovetail groove 12, two ball clacks 7 that will match with the inclined-plane draw in and leave lower valve base 2,3, be rotated further swivel nut 10, valve rod 8, guide peg 9 and combination valve core are by 15 half-twists of the track on the guide peg 9 position that reaches capacity, and combination valve core is all opened.
Claims (5)
1. one kind low moment of torsion upper kelly cock valve, it is characterized in that: this plug valve comprises valve body (1), upper valve base (2), lower valve base (3), the split collar (5) that has support set (4), wedge cone (6), globe disk (7), valve rod (8), guide peg (9), swivel nut (10), track pin (11), described upper valve base (2) and lower valve base (3) are arranged on the inside of valve body (1), the wedge cone (6) that both sides are provided with globe disk (7) is contained between upper valve base (2) and the lower valve base (3), on the longitudinal hole of valve body (1), be connected with guide peg (9) above the wedge cone (6), be connected with valve rod (8) below the wedge cone (6), valve rod (8) is connected with swivel nut (10), and the guiding position is provided with track pin (11) on the through hole of valve body (1).
2. a kind of low moment of torsion upper kelly cock valve according to claim 1, it is characterized in that: described wedge cone (6) links by the dovetail groove (12) on it with the globe disk (7) of both sides, three parts constitute combination valve core, and its sphere of the globe disk of combination valve core both sides (7) is sealing surface (13); Have dovetail groove (12) on the globe disk (7), have the dovetail guide (14) with dovetail groove (12) coupling on the wedge cone (6), wedge cone (6) and flap (7) can be by the slips that cooperatively interacts of dovetail groove on it (12) and dovetail guide (14).
3. a kind of low moment of torsion upper kelly cock valve according to claim 1 is characterized in that: be processed with trapezoidal thread on the described valve rod (8) and cooperate with swivel nut (10) and form worm drive.
4. a kind of upper kelly cock valve according to claim 1 is characterized in that: be milled with accurate helicla flute track (15) on the described guide peg (9).
5. a kind of low moment of torsion upper kelly cock valve according to claim 1 is characterized in that: have through hole (16) on the described wedge cone (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102179176A CN102071909A (en) | 2009-11-19 | 2009-11-19 | Low-torque upper kelly cock valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102179176A CN102071909A (en) | 2009-11-19 | 2009-11-19 | Low-torque upper kelly cock valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102071909A true CN102071909A (en) | 2011-05-25 |
Family
ID=44030645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102179176A Pending CN102071909A (en) | 2009-11-19 | 2009-11-19 | Low-torque upper kelly cock valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102071909A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742105A (en) * | 2014-02-08 | 2014-04-23 | 东营市创元石油机械制造有限公司 | Multifunctional cock valve for petroleum drilling |
| CN104763376A (en) * | 2015-04-14 | 2015-07-08 | 西南石油大学 | Kelly bar plug valve with floating valve seat |
| CN113719620A (en) * | 2021-11-01 | 2021-11-30 | 烟台金泰美林科技股份有限公司 | Double-rail double-sealing ceramic valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802652A (en) * | 1988-01-28 | 1989-02-07 | Rockwell International Corporation | Tapered ball valve |
| CN2787821Y (en) * | 2005-04-11 | 2006-06-14 | 西南石油学院 | Installing stub for square drill rod |
| 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 |
| CN201546670U (en) * | 2009-11-19 | 2010-08-11 | 李新利 | Low-torque upper kelly cock valve |
-
2009
- 2009-11-19 CN CN2009102179176A patent/CN102071909A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802652A (en) * | 1988-01-28 | 1989-02-07 | Rockwell International Corporation | Tapered ball valve |
| CN2787821Y (en) * | 2005-04-11 | 2006-06-14 | 西南石油学院 | Installing stub for square drill rod |
| 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 |
| CN201546670U (en) * | 2009-11-19 | 2010-08-11 | 李新利 | Low-torque upper kelly cock valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742105A (en) * | 2014-02-08 | 2014-04-23 | 东营市创元石油机械制造有限公司 | Multifunctional cock valve for petroleum drilling |
| CN104763376A (en) * | 2015-04-14 | 2015-07-08 | 西南石油大学 | Kelly bar plug valve with floating valve seat |
| CN113719620A (en) * | 2021-11-01 | 2021-11-30 | 烟台金泰美林科技股份有限公司 | Double-rail double-sealing ceramic valve |
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| Date | Code | Title | Description |
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| 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 |