CN201513157U - Inverse well-flushing double seal check valve - Google Patents

Inverse well-flushing double seal check valve Download PDF

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Publication number
CN201513157U
CN201513157U CN2009202222881U CN200920222288U CN201513157U CN 201513157 U CN201513157 U CN 201513157U CN 2009202222881 U CN2009202222881 U CN 2009202222881U CN 200920222288 U CN200920222288 U CN 200920222288U CN 201513157 U CN201513157 U CN 201513157U
Authority
CN
China
Prior art keywords
spool
urceolus
centre bore
seat
ball
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.)
Expired - Fee Related
Application number
CN2009202222881U
Other languages
Chinese (zh)
Inventor
王宗益
马云瑞
伏键
王双铃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China National Petroleum Corp
Tuha Petroleum Exploration and Development Headquarters
Original Assignee
China National Petroleum Corp
Tuha Petroleum Exploration and Development Headquarters
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China National Petroleum Corp, Tuha Petroleum Exploration and Development Headquarters filed Critical China National Petroleum Corp
Priority to CN2009202222881U priority Critical patent/CN201513157U/en
Application granted granted Critical
Publication of CN201513157U publication Critical patent/CN201513157U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an inverse well-flushing double seal check valve, which is applied to the workover process of the oil-gas-water well in the petroleum industry. The upper end of the center hole of an outer cylinder is provided with a sliding sleeve. The inside of the center hole of the sliding sleeve is provided with an annular ball seat surface. The middle part of the outer cylinder is fixed with a valve seat. The lower end of the center hole of the outer cylinder is provided with an annular step. A valve core is arranged in the center hole of the outer cylinder and between the annular step and the valve seat. The inside of a groove on the top of the valve core is provided with a steel ball. The upper end of the center hole of the valve core is provided with an inclined hole. The lower end of the center hole of the valve core is fixed with an end cover. The wall of the valve core is provided with a transverse hole. A spring is arranged between the valve core and the outer cylinder. The inverse well-flushing double seal check valve is suitable for the working site of the petroleum industry, particularly in the maintenance and workover processes of the oil-gas-water well, and can control the problems that high-pressure oil-gas-water overflows from the upper middle part of the oil pipe or sprays out of the ground to cause the well control accident; and the high-density liquid, such as drilled cement and the like, flow reversely upward from the lower mineshaft along the inside of the oil pipe to cause pollution. And the inverse well-flushing double seal check valve can realize inverse circulation well-flushing and well-killing.

Description

A kind of back-washable well double seal ball-and-seat
Technical field
The utility model relates to the control device of controlling one-directional fluid flow under the oil well on the tubing string, the particularly a kind of down-hole special tool that can control fluid flow direction.
Background technology
The exploitation scene of petroleum industry, usually use ball-and-seat control fluid flow direction, especially safeguard in the workover treatment process at oil gas water well that the hydraulic oil air water of using ball-and-seat control stratum output upwards overflows ground or do not have the control ejection and generation well control accident from oil pipe; Interior dense fluids of application ball-and-seat control mineshaft annulus or high-pressure water injection well oppositely flowed into oil pipe and cause workover treatment work difficulty from the high pressure injection water of stratum output during some technology was implemented.
At present, known down-hole normally closed type ball-and-seat has spherical ball-and-seat, taper ball-and-seat and annular ball-and-seat, and the former valve ball, the latter's the valve body conical surface always covers on the valve port of valve seat, and sealing is everywhere in the linear sealing state.It realizes metal to metal seal between valve ball or spool and the valve seat by the pressure of medium these ball-and-seats, and pressure medium is big more, and sealing performance is good more.Sealing place between the valve ball and the valve seat conical surface or spool and the valve seat conical surface is wire sealing or face sealing, is subjected to the yielding inefficacy of face that is sealed and matched after the high pressure effect but often exist; Owing to making can not closely cooperate between the face of being sealed and matched, the precision difference of processing and manufacturing do not reach sealing function; Has only place sealing, no additional seal after being subjected to erosion of pit shaft inner fluid and corrosion failure and make it ineffective; When needs carry out anti-flushing well, owing to be normally closed type ball-and-seat and can not realizing, be drilled into ability well-flushing in the well again down after need tripping out in the well, make troubles to construction, even cause that accident causes unnecessary loss.
The utility model content
The purpose of this utility model is: a kind of back-washable well double seal ball-and-seat is provided, fluid is opened runner when descending all the time in oil pipe, fluid is closed the normally closed type ball-and-seat of runner when up in oil pipe, be applicable to several work tubing string and oil gas water well completion tubular column in the oil-water well maintenance well workover.When realizing the downward one-way flow of common normally closed type ball-and-seat, possess double seal characteristic upwards, can realize anti-circulation well cleanup and kill-job again where necessary, metallic seal place has been to do step-down buffering and auxiliary seal effect.Overcome the deficiency that the normally closed type ball-and-seat has only place sealing.
The technical solution adopted in the utility model is: back-washable well double seal ball-and-seat, mainly by urceolus, sliding sleeve, shear pin, valve seat, steel ball, spool and spring, urceolus is the cylinder bodily form, centre bore is arranged, there is internal thread upper end at urceolus, there is external screw thread lower end at urceolus, can be connected in the down-hole string.It is characterized in that:
Upper end at the urceolus centre bore is fixed with a sliding sleeve by shear pin.Through hole is arranged, sliding sleeve shutoff through hole on outer tube wall.Sliding sleeve is the cylinder bodily form, and an annular ball seat face is arranged in the sliding sleeve centre bore.After having high input steel ball from well head, big steel ball and sliding sleeve build the pressure, and after the pressure value of reaching a certain height, sliding sleeve slides downwards is also cut off shear pin.At this moment the through hole on the urceolus is opened, and can carry out circulation well cleanup by through hole.
There is screw thread at middle part at the urceolus centre bore, is fixed with valve seat on the screw thread, and valve seat has centre bore, and an annular ball seat face is arranged at center, valve seat lower surface.
In the lower end of urceolus centre bore a ring-shaped step is arranged, a spool is arranged in the urceolus centre bore and between ring-shaped step and valve seat.Spool can slide along outer tube inner wall, and the ring-shaped step center is passed in the lower end of spool.The top of described spool is fluted, and a steel ball is arranged in the spool top groove.Steel ball can seal valve seat annular ball seat face from lower seat.Spool has centre bore, in upper end, center spool hole inclined hole is arranged, and makes center spool hole and top UNICOM.Be fixed with end cap in lower end, center spool hole, end cap shutoff centre bore.On the spool wall transverse holes is arranged, transverse holes makes center spool hole and external communication.On the outer wall of spool, ring-shaped step is arranged, form annular space between spool outer wall and the urceolus, spring is arranged in annular space.
Annular ball seat face is a taper seat in the sliding sleeve centre bore; Valve seat lower surface center annular ball seat face is a taper seat.
In order to limit spool to the distance that glides, second ring-shaped step is arranged on the outer wall of spool, when spool to lower slider, spool second ring-shaped step is with after urceolus lower end ring-shaped step contacts, the transverse holes of spool and urceolus lower end UNICOM.
In order to improve sealing, an O RunddichtringO is arranged respectively at sliding sleeve outer wall two ends; An O RunddichtringO is arranged on valve seat outer wall lower end, on the hole wall of center, urceolus lower end, twice O RunddichtringO is arranged.
For the valve seat that is tightened is installed, rectangular slot is arranged in the upper surface of valve seat.
The operating principle of back-washable well double seal ball-and-seat:
Consult Fig. 2.Bottom at urceolus 1 constitutes the first road slipper seal system by spool 8 and urceolus 1, O RunddichtringO 5.Under the normal operating conditions, fluid is downward by valve seat 6 centre bores, makes spool 8 to lower slider, and fluid enters inclined hole 12 continuation promotion spools 8 and moves downward; After the transverse holes 11 of spool 8 skidded off urceolus 1 lower end centre bore downwards, fluid flowed into the tubing string bottom by transverse holes 11.
Consult Fig. 1.The middle part is by urceolus 1, valve seat 6, spool 8, steel ball 7, spring 9, O RunddichtringO 5 constitute metal and Metal Contact sealing surface and reach the second road ball-type sealing system of sealing function down.Fluid upwards flows when well kick takes place, and promotes spool 8 with spring 9 actings in conjunction and moves upward, and 7 of following steel balls are enclosed on the annular ball seat face of valve seat 6 and sealing, prevent that gas blowout accident from taking place.
Consult Fig. 3.Top constitutes the anti-circulating system of normally closed sleeve type by urceolus 1, sliding sleeve 2, shear pin 3, big steel ball 14, O RunddichtringO 5.When needs carry out recycled back, then drop into steel ball 8 by ground, steel ball 8 drops on the annular ball seat face of the conical surface 12 of sliding sleeve 2, exert pressure by injecting fluid air exercise steel ball 14, cut off shear pin 3, sliding sleeve 2, big steel ball 14 and O RunddichtringO 5 downward direction together slide, thereby through hole 4 is opened.Make inside and outside connection of tubing string realize anti-cycle operation.
The beneficial effects of the utility model: the back-washable well double seal of the utility model ball-and-seat is applicable to and the exploitation scene of petroleum industry especially safeguards in the workover treatment process at oil gas water well.Use back-washable well double seal ball-and-seat, the hydraulic oil air water that can control the stratum output overflows from oil pipe or sprays ground and the well control accident takes place; In bore removing cement plug and bridging plug operation, bore fouling on the decannulation inwall, technology such as sand washing implements, use in its control sand washing process and be mixed with grit (grain), bore in the plug process that annular space is mixed with that cement is considered to be worth doing and the high density liquid of bridging plug metal fillings upwards flows backward to ground in oppositely from the bottom pit shaft along oil pipe, pollute, inconvenience is constructed and is caused workover treatment work difficulty; And the fluid that control is bored in the plug rear lower high pressure zone is ejected into ground suddenly, causes gas blowout accident and arrive; In construction when anti-if desired circulation well cleanup and kill-job, can drop into a steel ball by ground and sliding sleeve is opened be realized anti-circulation well cleanup and kill-job.
Description of drawings
Fig. 1 is the back-washable well double seal of a utility model ball-and-seat structural profile schematic diagram.
Among the figure, 1. urceolus, 2. sliding sleeve, 3. shear pin, 4. through hole, 5.O RunddichtringO, 6. valve seat, 7. steel ball, 8. spool, 9. spring, 10. end cap, 11. transverse holes, 12. inclined holes, 13. grooves, 14. big steel balls.
The specific embodiment
Embodiment 1: with a back-washable well double seal ball-and-seat is example, and the utility model is described in further detail.
Consult Fig. 1.The back-washable well double seal of the utility model ball-and-seat, mainly by urceolus 1, sliding sleeve 2, shear pin 3, valve seat 6, steel ball 7, spool 8 and spring 9, urceolus 1 is the cylinder bodily form, and centre bore is arranged, and in the upper end of urceolus 1 internal thread is arranged, and in the lower end of urceolus 1 external screw thread is arranged.
Upper end at urceolus 1 centre bore is fixed with a sliding sleeve 2 by four shear pins 3.Sliding sleeve 2 outer wall two ends have an O RunddichtringO 5 respectively.Four through holes 4 are arranged, sliding sleeve 2 shutoff through holes 4 on urceolus 1 wall.Sliding sleeve 2 is the cylinder bodily form, and an annular ball seat face is arranged in sliding sleeve 2 centre bores.Annular ball seat face is a taper seat in sliding sleeve 2 centre bores.
There is screw thread at middle part at centre bore, is fixed with valve seat 6 on the screw thread, and valve seat has an O RunddichtringO 5 on the 6 outer wall lower ends.Valve seat 6 has centre bore, the annular ball seat face that has an energy to cooperate with following steel ball 7 at center, valve seat 6 lower surface.Valve seat 6 lower surface center annular ball seat faces are taper seat.A rectangular slot 13 (setting tool groove) is arranged in the upper surface of valve seat 6.
In the lower end of urceolus 1 centre bore a ring-shaped step is arranged, a spool 8 is arranged in urceolus 1 lower end centre bore and between ring-shaped step and valve seat 6.On the hole wall of center, urceolus 1 lower end twice O RunddichtringO 5 is arranged.Spool 8 can slide along urceolus 1 inwall, and the ring-shaped step center is passed in the lower end of spool 8.The top of described spool 8 is fluted, and a steel ball 7 is arranged in spool 8 top groove.Steel ball 7 can seal valve seat 6 annular ball seat faces from lower seat.Spool 8 has centre bore, in spool 8 centre bores upper end four inclined holes 12 is arranged, and makes spool 8 centre bores and top UNICOM.Be welded with a discoidal end cap 10 in spool 8 centre bore lower ends, end cap 10 shutoff centre bores.On spool 8 walls transverse holes 11 is arranged, transverse holes 11 makes spool 8 centre bores and external communication.On the outer wall of spool 8, ring-shaped step is arranged, form annular space between spool 8 outer walls and the urceolus 1, spring 9 is arranged in annular space.Second ring-shaped step is arranged on the outer wall of spool 8.

Claims (5)

1. back-washable well double seal ball-and-seat, mainly by urceolus (1), sliding sleeve (2), shear pin (3), valve seat (6), steel ball (7), spool (8) and spring (9), urceolus (1) is the cylinder bodily form, centre bore is arranged, there is internal thread upper end at urceolus (1), there is external screw thread lower end at urceolus (1), it is characterized in that:
Upper end at urceolus (1) centre bore is fixed with a sliding sleeve (2) by shear pin (3), on urceolus (1) wall through hole (4) is arranged, sliding sleeve (2) shutoff through hole (4), and sliding sleeve (2) is the cylinder bodily form, and an annular ball seat face is arranged in sliding sleeve (2) centre bore;
There is screw thread at middle part at urceolus (1) centre bore, is fixed with valve seat (6) on the screw thread, and valve seat (6) has centre bore, at valve seat (6) center, lower surface an annular ball seat face is arranged;
There is a ring-shaped step lower end at urceolus (1) centre bore, in urceolus (1) centre bore and between ring-shaped step and valve seat (6), a spool (8) is arranged, spool (8) can slide along urceolus (1) inwall, the ring-shaped step center is passed in the lower end of spool (8), the top of described spool (8) is fluted, in spool (8) top groove, a steel ball (7) is arranged, spool (8) has centre bore, in spool (8) centre bore upper end inclined hole (12) is arranged, make spool (8) centre bore and top UNICOM, be fixed with end cap (10) in spool (8) centre bore lower end, end cap (10) shutoff centre bore, on spool (8) wall, transverse holes (11) is arranged, transverse holes (11) makes spool (8) centre bore and external communication, on the outer wall of spool (8), ring-shaped step is arranged, form annular space between spool (8) outer wall and the urceolus (1), spring (9) is arranged in annular space.
2. back-washable well double seal ball-and-seat according to claim 1 is characterized in that: annular ball seat face is a taper seat in sliding sleeve (2) centre bore; Valve seat (6) lower surface center annular ball seat face is a taper seat.
3. back-washable well double seal ball-and-seat according to claim 1 is characterized in that: second ring-shaped step is arranged on the outer wall of spool (8).
4. back-washable well double seal ball-and-seat according to claim 1 is characterized in that: at sliding sleeve (2) outer wall two ends an O RunddichtringO (5) is arranged respectively; On valve seat (6) outer wall lower end, an O RunddichtringO (5) is arranged, on the hole wall of urceolus (1) center, lower end, twice O RunddichtringO (5) is arranged.
5. according to claim 1,2,3 or 4 described back-washable well double seal ball-and-seats, it is characterized in that: rectangular slot (13) is arranged in the upper surface of valve seat (6).
CN2009202222881U 2009-09-04 2009-09-04 Inverse well-flushing double seal check valve Expired - Fee Related CN201513157U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202222881U CN201513157U (en) 2009-09-04 2009-09-04 Inverse well-flushing double seal check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202222881U CN201513157U (en) 2009-09-04 2009-09-04 Inverse well-flushing double seal check valve

Publications (1)

Publication Number Publication Date
CN201513157U true CN201513157U (en) 2010-06-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009202222881U Expired - Fee Related CN201513157U (en) 2009-09-04 2009-09-04 Inverse well-flushing double seal check valve

Country Status (1)

Country Link
CN (1) CN201513157U (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102536183A (en) * 2012-01-31 2012-07-04 中国石油化工股份有限公司 Underground gas injection pipe column
CN102808596A (en) * 2012-08-10 2012-12-05 中国石油化工股份有限公司 Downhole constant pressure valve for oil tube
RU2493355C2 (en) * 2011-08-15 2013-09-20 Владимир Анатольевич Уфимцев Back pressure valve
CN103410462A (en) * 2013-08-27 2013-11-27 山东宝世达石油装备制造有限公司 Hollow-rod well washing check valve
CN104405337A (en) * 2014-10-15 2015-03-11 中国石油天然气股份有限公司 Four-functional tail pipe valve
CN104563959A (en) * 2014-12-26 2015-04-29 中国石油天然气股份有限公司 Blowout prevention valve
CN107893644A (en) * 2017-12-27 2018-04-10 山东博赛特石油技术有限公司 A kind of underground hydraulic pressure control device
CN108119077A (en) * 2016-11-29 2018-06-05 中国石油天然气股份有限公司 A kind of Operating Pressure flushing valve
CN109707343A (en) * 2018-12-12 2019-05-03 中国海洋石油集团有限公司 A kind of thermal recovery underground annular control valve
CN110905447A (en) * 2018-09-18 2020-03-24 中国石油天然气股份有限公司 Underground switch device
CN113431514A (en) * 2021-07-08 2021-09-24 中石化石油工程技术服务有限公司 Anti-erosion circulation well-flushing tool capable of improving well-flushing effect
RU210458U1 (en) * 2021-12-09 2022-04-15 АКЦИОНЕРНОЕ ОБЩЕСТВО "КОНЦЕРН "МОРСКОЕ ПОДВОДНОЕ ОРУЖИЕ-ГИДРОПРИБОР" (АО "Концерн "МПО-Гидроприбор") SHUT-OFF ASSEMBLY FOR CHANNEL SHUT-OFF

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2493355C2 (en) * 2011-08-15 2013-09-20 Владимир Анатольевич Уфимцев Back pressure valve
CN102536183A (en) * 2012-01-31 2012-07-04 中国石油化工股份有限公司 Underground gas injection pipe column
CN102808596B (en) * 2012-08-10 2015-05-20 中国石油化工股份有限公司 Downhole constant pressure valve for oil tube
CN102808596A (en) * 2012-08-10 2012-12-05 中国石油化工股份有限公司 Downhole constant pressure valve for oil tube
CN103410462A (en) * 2013-08-27 2013-11-27 山东宝世达石油装备制造有限公司 Hollow-rod well washing check valve
CN104405337A (en) * 2014-10-15 2015-03-11 中国石油天然气股份有限公司 Four-functional tail pipe valve
CN104563959A (en) * 2014-12-26 2015-04-29 中国石油天然气股份有限公司 Blowout prevention valve
CN108119077A (en) * 2016-11-29 2018-06-05 中国石油天然气股份有限公司 A kind of Operating Pressure flushing valve
CN108119077B (en) * 2016-11-29 2020-05-08 中国石油天然气股份有限公司 Well washing valve for under-pressure operation
CN107893644A (en) * 2017-12-27 2018-04-10 山东博赛特石油技术有限公司 A kind of underground hydraulic pressure control device
CN107893644B (en) * 2017-12-27 2020-01-21 山东博赛特石油技术有限公司 Underground hydraulic control device
CN110905447A (en) * 2018-09-18 2020-03-24 中国石油天然气股份有限公司 Underground switch device
CN109707343A (en) * 2018-12-12 2019-05-03 中国海洋石油集团有限公司 A kind of thermal recovery underground annular control valve
CN113431514A (en) * 2021-07-08 2021-09-24 中石化石油工程技术服务有限公司 Anti-erosion circulation well-flushing tool capable of improving well-flushing effect
RU210458U1 (en) * 2021-12-09 2022-04-15 АКЦИОНЕРНОЕ ОБЩЕСТВО "КОНЦЕРН "МОРСКОЕ ПОДВОДНОЕ ОРУЖИЕ-ГИДРОПРИБОР" (АО "Концерн "МПО-Гидроприбор") SHUT-OFF ASSEMBLY FOR CHANNEL SHUT-OFF

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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: 20100623

Termination date: 20100904