CN201306146Y - Inner blowout preventing device with pressure balance and combined seal - Google Patents
Inner blowout preventing device with pressure balance and combined seal Download PDFInfo
- Publication number
- CN201306146Y CN201306146Y CNU2008202227804U CN200820222780U CN201306146Y CN 201306146 Y CN201306146 Y CN 201306146Y CN U2008202227804 U CNU2008202227804 U CN U2008202227804U CN 200820222780 U CN200820222780 U CN 200820222780U CN 201306146 Y CN201306146 Y CN 201306146Y
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- pressure
- metal
- valve base
- ball valve
- inner blowout
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Abstract
The utility model relates to an inner blowout preventing device with pressure balance and combined seal, which belongs to oil drilling equipment. The blowout preventing device comprises a body, wherein through holes are arranged in the body; an upper valve base and a lower valve base are arranged in the through holes of the body; a ball valve is arranged between the upper valve base and the lower valve base; a knob is connected with the ball valve and positioned in a knob hole arranged on the body; and a main body is arranged at one end of the body. The utility model is characterized in that a pass-by balance flow passage is arranged in the body, and is connected with the low-pressure end and the high-pressure end of the ball valve of the inner blowout preventing device; the opening of the low-pressure end of the pass-by balance flow passage is provided with a plug; the high-pressure end of the pass-by balance flow passage is provided with a balance cork and a plug; and simultaneously, each seal point adopts soft seal by O-shaped rings, and adopts a combined metal-to-metal structure with double seal. The utility model adopts the design structure with a main seal structure and an auxiliary seal structure by metal to metal, and metal to high-saturation hydrogenated butadiene-acrylonitrile rubber, and the design structure with a a pass-by balance flow passage and a pressure transmitting hole. The utility model forcefully ensures the safe and reliable seal of the inner blowout preventing device and effectively solves the problem that the rotation fails because of the big pressure difference between the left end and the right end of the ball valve during the inner blowout preventing device is closed.
Description
Technical field
The utility model belongs to the preventer in the oil drilling and extracting equipment technical field, particularly wellhead equipment.
Background technology
The quality of sealing performance is to influence whether normal one of principal element of performance of inner blowout preventer function, and it plays important effect aspect the safe operation guaranteeing to creep into.At present, the home and abroad inner blowout preventer mostly adopts single metal to metal seal, sealing surface need match smooth grinding, the machining accuracy height, this has not only increased production cost of products, shortcomings such as and the inner blowout preventer sealing surface that grinds of pairing exists to scratch easily and damage, and key components and parts interchangeability is poor, and application life is low.And inner blowout preventer hermetically-sealed construction ubiquity rotates " inefficacy " problem, promptly, meeting well kick or blowout takes place, after inner blowout preventer is closed, the ball valve high-pressure side is because of under the effect of high pressure liquid stream, and ball valve is opened quite difficulty once more, ball valve often occurs and does not open, situation that knob fractures takes place, and what influence the oil field then normally creeps into production.
Summary of the invention
The utility model purpose is a kind of pressure balance of design and combination sealing inner blowout preventer, and the combination double sealing structure of design soft seal and metal to metal is guaranteed the security reliability that inner blowout preventer seals; Design bypass balanced runner and pressure transmission pore structure when guaranteeing the good seal performance of inner blowout preventer, make the inner blowout preventer switch flexible, effectively solve inner blowout preventer and rotate " inefficacy " problem.
Specifically, pressure balance and combination sealing inner blowout preventer, comprise body, have through hole in the body, upper valve base and lower valve base are installed in the body through-holes, ball valve is installed between upper valve base and the lower valve base, knob is connected on the ball valve and is positioned at knob hole on the body, main body is installed in body one end, it is characterized in that in body, having bypass balanced runner and this bypass balanced runner and be communicated with inner blowout preventer ball valve low-pressure end and high-pressure side, at bypass balanced runner low-pressure end opening stifled son is housed, balanced plug and stifled son is housed at bypass balanced runner high-pressure side; Circle soft seal of O shape and metal to metal combination double sealing structure are adopted in each sealing place simultaneously.
Between upper valve base and lower valve base and the body through-holes, between knob and the body installing hole, adopt the soft seal of O shape circle between balanced plug and the body apertures; Adopt circle soft seal of O shape and metal to metal combination double sealing structure between ball valve and upper valve base and the lower valve base.
Balanced plug adopts circlip for hole to be installed on the bypass balanced runner and the balanced plug end is to be metal to metal tapering hermetically-sealed construction between pyramidal structure and the body.
Fluid pressure transmission hole ditch pass ball valve closed chamber and main body flow passage chamber are arranged on the balanced plug.
The utility model is compared with background technology has following characteristics:
1. ball valve and valve seat adopt the combination double sealing structure of soft seal and metal to metal.Make the sealing performance of inner blowout preventer become safe and reliable,
2. She Ji bypass balanced runner and pressure transmission pore structure, make inner blowout preventer after closing, the ball valve that can not cause because of the percussion of high pressure liquid stream outwarding winding once more rotates difficulty, even can't open, and the situation generation that the operation failure influence is normally crept into occurs.And the bypass balanced runner structure on the ball valve body also is provided with balanced plug (adopt metal to metal tapering hermetically-sealed construction, rectangular flow passages is arranged on it) and circlip for hole, for the safety operation that guarantees inner blowout preventer provides powerful guarantee.
The balanced plug control of bypass balanced runner equilibrium pressure structure by metal to metal seal makes an inner blowout preventer ball valve left side (low-pressure end) right-hand member (high-pressure side) pressure balance, make that ball valve rotates flexibly, switch freely; Pressure transmission pore structure ditch pass ball valve closed chamber and main body flow passage chamber, make ball valve closed chamber and main body flow passage chamber open phase pressure and keep balance at inner blowout preventer, and close the phase at inner blowout preventer, the sealing ring of lubricated combination double containment reduces the wearing and tearing that sealing ring causes because of relative motion.
Description of drawings
Figure is inner blowout preventer combined sealing structure and bypass flow channel pressure balancing structure schematic diagram (only for key position).
Figure number explanation: 1-body; The 2-support ring; The last split collar of 3-; The 5-upper valve base; Split collar under the 7-; The 9-knob; The 10-ball valve; The 11-spring; 13, lower valve base; The 14-main body; The stifled son of 15-; The 16-balanced plug; 19,20-circlip for hole; 4,6,8,12,17-bracing ring; 21,22,23,24,25-O shape circle.
The specific embodiment
As shown in the figure, pressure balance and combination sealing inner blowout preventer, comprise body 1, have through hole in the body 1, upper valve base 5 and lower valve base 13 are installed in the body through-holes, ball valve 10 is installed between upper valve base 5 and the lower valve base 13, knob 9 is connected on the ball valve 10 and is positioned at knob hole on the body, main body 14 is installed in body 1 one ends, it is characterized in that in body 1, having bypass balanced runner and this bypass balanced runner and be communicated with inner blowout preventer ball valve low-pressure end and high-pressure side, at bypass balanced runner low-pressure end opening stifled son 15 is housed, balanced plug 16 and stifled son 15 is housed at bypass balanced runner high-pressure side; Circle soft seal of O shape and metal to metal combination double sealing structure are adopted in each sealing place simultaneously
The inner blowout preventer sealing mechanism:
The hermetically-sealed construction of inner blowout preventer as shown in drawings, mainly being made up of last split collar 3, upper valve base 5, following split collar 7, ball valve 10, knob 9, lower valve base 13, spring 11, balanced plug 16, body 18 and sealing ring, is a kind of inner blowout preventer effective seal scheme that is used for.This structure mainly contains sealing everywhere, is respectively the hermetically-sealed construction of upper and lower valve seat (5,13) and inner blowout preventer body, knob 8 and body 1, balanced plug 16 and body bypass balance pipe and ball valve 10 and upper valve base 5 and lower valve base 13.Combination double sealing structure between wherein upper and lower valve seat and ball valve is that inner blowout preventer prevents the key sealing that the arrival end and the port of export are ganged up when closing.And the sealing between knob and body, balanced plug and the body is in order to prevent drilling fluid to external leakage, and these three kinds of sealings all are to adopt sealing ring to add support ring hermetically-sealed construction form.The quality of sealing performance is to influence whether normal one of principal element of performance of inner blowout preventer function, choosing of encapsulant just seems particularly important, it directly has influence on whole functional performance of inner blowout preventer and life-span, so in this structure, the material of sealing ring adopts high saturated hydrogenation butyronitrile rubber (HNBR), its high comprehensive performance can satisfy the instructions for use of product under the hydrogen sulfide medium operating mode.
Also having an important sealing in this structure is exactly sealing between ball valve and the valve seat, its effect is to block being communicated with of arrival end and the port of export fully, prevent well kick or blowout, therefore ball valve and valve seat adopt the dual combination sealing of sealing ring sealing and metal to metal, when inner blowout preventer was closed, under the high pressure effect of right side, spheroid was moved to the left, at first compress sealing ring, the metal surface of spheroid and upper valve base 5 is compressed.After upper valve base contacts, form enforceable single face sealing, the high pressure liquid stream that produces when blocking well kick or blowout fully in the left side of ball.If the slit occurs between lower valve base 13 and ball valve, cause knob place and high pressure liquid stream to connect, just might cause that drilling fluid leaks.Because lower valve base 13 can slide, under spring force and hydraulic coupling synergy, the right side of ball and lower valve base 13 form sealing, the blocking-up high pressure liquid stream enters the knob position, even this is sealed with a little seepage, the liquid that leaks out very big loss will occur by the pressure in slit, can not constitute big threat to the sealing at knob place.Briefly, when inner blowout preventer is closed, between upper valve base 5 and spheroid, and the direct sealing that forms metal to metal between lower valve base 13 and the spheroid, but when pressure was not high, lower valve base 13 relied on soft sealing material to form sealing under spring force and hydraulic coupling synergy.When inner blowout preventer is opened, all be to rely on soft seal to form sealing between both sides valve seat 5,13 and the spheroid.The right side valve seat must float, and relies on spring force or spring force to add fluid pressure it is applied pretightning force.
Bypass balanced runner structure and pressure transmission pore structure
Bypass balanced runner structure as shown in drawings, this balanced runner and pressure transmission hole are positioned on the inner blowout preventer body, make the duct of high-pressure well liquid shunting, with the cavity of resorption and the epicoele connection of inner blowout preventer, this bypass flow channel is provided with balanced plug 16, circlip for hole 19 and stifled son 15.Its operating principle is: when the spheroid of inner blowout preventer is closed, the high pressure effect can appear in the below of ball valve, cause ball valve to rotate quite difficulty, and at this time as long as loosening a little balanced plug, make high-pressure fluid enter bypass flow channel, link up inner blowout preventer right-hand member high pressure chest and left end low pressure chamber, left and right cavity pressure is ganged up, reduce the difference force that is subjected to when ball valve is rotated, make ball valve rotate conveniently, open flexibly.The pressure transmission pore structure, its effect is similar with bypass flow channel, mainly be for pressure transmission pore structure ditch pass ball valve 10 closed chamber and main body flow passage chamber, make ball valve 10 closed chamber and main body flow passage chamber open phase pressure and keep balance at inner blowout preventer, and close the phase at inner blowout preventer, the sealing ring of lubricated combination double containment reduces the wearing and tearing that sealing ring causes because of relative motion.
In addition, circle 19 is worked as with elasticity in balanced plug 16 that bypass flow channel is provided with and hole, when inner blowout preventer is linked up inner blowout preventer right-hand member high pressure chest and left end low pressure chamber, when left and right cavity pressure is ganged up, because it is bigger that instantaneous pressure impacts, might cause balanced plug to fly out and hurt sb.'s feelings, and the existence of circlip for hole is exactly in order to prevent that balanced plug from flying out, so this structure Design is not only simple and compact for structure, and execute-in-place is safe and reliable.
Claims (4)
1. pressure balance and combination sealing inner blowout preventer, comprise body (1), body has through hole in (1), upper valve base (5) and lower valve base (13) are installed in the body through-holes, ball valve (10) is installed between upper valve base (5) and the lower valve base (13), knob (9) is connected ball valve (10) and goes up and be positioned at knob hole on the body, main body (14) is installed in body (1) one end, it is characterized in that in body (1), having bypass balanced runner and this bypass balanced runner and be communicated with inner blowout preventer ball valve low-pressure end and high-pressure side, at bypass balanced runner low-pressure end opening stifled son (15) is housed, balanced plug (16) and stifled son (15) is housed at bypass balanced runner high-pressure side; Circle soft seal of O shape and metal to metal combination double sealing structure are adopted in each sealing place simultaneously.
2, pressure balance according to claim 1 and combination sealing inner blowout preventer is characterized in that between upper valve base (5) and lower valve base (13) and the body through-holes, between knob (9) and the body installing hole, adopt the soft seal of O shape circle between balanced plug (16) and the body apertures; Adopt circle soft seal of O shape and metal to metal combination double sealing structure between ball valve (10) and upper valve base (5) and the lower valve base (13).
3, pressure balance according to claim 1 and combination sealing inner blowout preventer is characterized in that balanced plug (16) adopts circlip for hole (19) to be installed on the bypass balanced runner and balanced plug (16) end is to be metal to metal tapering hermetically-sealed construction between pyramidal structure and the body.
4,, it is characterized in that fluid pressure transmission hole ditch pass ball valve (10) closed chamber and main body flow passage chamber are arranged on the balanced plug (16) according to claim 1 or 3 described pressure balances and combination sealing inner blowout preventer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202227804U CN201306146Y (en) | 2008-11-22 | 2008-11-22 | Inner blowout preventing device with pressure balance and combined seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202227804U CN201306146Y (en) | 2008-11-22 | 2008-11-22 | Inner blowout preventing device with pressure balance and combined seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201306146Y true CN201306146Y (en) | 2009-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202227804U Expired - Fee Related CN201306146Y (en) | 2008-11-22 | 2008-11-22 | Inner blowout preventing device with pressure balance and combined seal |
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| Country | Link |
|---|---|
| CN (1) | CN201306146Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071908A (en) * | 2010-12-16 | 2011-05-25 | 张跃 | Anti-blowout control valve |
| CN105257236A (en) * | 2015-10-29 | 2016-01-20 | 宝鸡巨基机械制造有限公司 | Wellhead blowout preventer |
| CN108374645A (en) * | 2018-02-08 | 2018-08-07 | 西南石油大学 | A kind of interior blowout hookup of deep water hydrocarbon test |
| CN109790744A (en) * | 2016-09-12 | 2019-05-21 | 动压控制有限责任公司 | Improved preventer |
| CN112983334A (en) * | 2021-04-09 | 2021-06-18 | 盐城佰信石油机械有限公司 | Blowout prevention controller for oil field wellhead and manufacturing method |
-
2008
- 2008-11-22 CN CNU2008202227804U patent/CN201306146Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071908A (en) * | 2010-12-16 | 2011-05-25 | 张跃 | Anti-blowout control valve |
| CN102071908B (en) * | 2010-12-16 | 2013-05-08 | 张跃 | Anti-blowout control valve |
| CN105257236A (en) * | 2015-10-29 | 2016-01-20 | 宝鸡巨基机械制造有限公司 | Wellhead blowout preventer |
| CN109790744A (en) * | 2016-09-12 | 2019-05-21 | 动压控制有限责任公司 | Improved preventer |
| CN108374645A (en) * | 2018-02-08 | 2018-08-07 | 西南石油大学 | A kind of interior blowout hookup of deep water hydrocarbon test |
| CN112983334A (en) * | 2021-04-09 | 2021-06-18 | 盐城佰信石油机械有限公司 | Blowout prevention controller for oil field wellhead and manufacturing method |
| CN112983334B (en) * | 2021-04-09 | 2021-10-08 | 盐城佰信石油机械有限公司 | Blowout prevention controller for oil field wellhead and manufacturing method |
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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: 20090909 Termination date: 20121122 |