CN102635329A - Novel double-seal arrow-shaped check valve - Google Patents
Novel double-seal arrow-shaped check valve Download PDFInfo
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- CN102635329A CN102635329A CN2012100878892A CN201210087889A CN102635329A CN 102635329 A CN102635329 A CN 102635329A CN 2012100878892 A CN2012100878892 A CN 2012100878892A CN 201210087889 A CN201210087889 A CN 201210087889A CN 102635329 A CN102635329 A CN 102635329A
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Abstract
The invention relates to a novel double-seal arrow-shaped check valve, is mainly used for an anti-spraying device in an oilfield drill column and belongs to the field of well control equipment of a petroleum and gas drilling well. The novel double-seal arrow-shaped check valve comprises an upper valve body, a lower valve body, an arrow-shaped valve core, a supporting base, a rubber cylinder, a thrust block, a spring and a valve core rear part rod, wherein the upper valve body is connected with the lower valve body through a thread; the inner part of the upper valve body is designed with a tapered surface; the tapered surface and a tapered face of the arrow-shaped valve core are contacted to form a seal; the lower valve body is internally provided with the supporting base and the rubber cylinder, the thrust block and the spring are sleeved in the rear part of the arrow-shaped valve core; the valve core rear part rod and the supporting base are clamped through a safe clamping ring; and drilling-down liquid and well drilling liquid do not block a channel in a normal circulation process. The novel double-seal arrow-shaped check valve has the advantages of simple structure, smooth flow channel, small drilling-down resistance and a well drilling medium can smoothly pass through; and at a high pressure, the novel double-seal arrow-shaped check valve has a double-sealing effect, can prevent underground fluid from upwards flowing and is good for well control work.
Description
Technical field
The present invention relates to a kind of new type double sealing flechette-type flap valve, be mainly used in the interior blowout hookup of oil field drill string, belong to oil and gas well drilling well control equipment field.
Background technology
Because stratum complicated and changeable usually can run into the stratum high-pressure fluid in the drilling process,, influence drillng operation safety and drilling efficiency if there is not reliable blowout prevention system just well kick or blowout might take place.At present, the existing ability of the preventer of various types and specification is controlled outer well kick of drill string or blowout, and blowout prevention technology remains further to be improved in the drill string.The flechette-type flap valve is connected in the drill string as blowout prevention instrument in a kind of drill string, and when running into high-pressure oil-gas layer and make progress roof pressure, the drill string internal channel is closed in the sealing that can drive that the flechette-type spool moves up and valve seat is fitted, and prevents blowout and well kick.In the prior art; Flechette-type flap valve critical piece has valve body; Parts such as pressure cap, valve seat are arranged in the valve body, and its shortcoming is that pressure cap needs also will compress valve seat through being threaded in valve inner, thereby the slit between pressure cap, valve seat and valve inner needs seal through rubber parts.The existence of pressure cap has limited the passage of drilling well medium, produces resistance, and the rubber parts that is used for sealing under the effect of high-voltage high-speed fluid easily inefficacy come off and influence the sealing effectiveness of flechette-type spool; Because spool receives deadweight and spring acting in conjunction and valve seat to be in contact condition, and receives the influence to buoyancy in the process of going into the well, spool is often sealed valve seat, and the drilling tool hydrophthalmia is closed when making down brill, and so not only the speed of drilling rod is transferred in influence, and is also unfavorable to the well control operation; The spring of existing flechette-type check valve spool bottom conquassation also occurs and lost efficacy under nothing is pressed and protected.
The primary seal that present existing flechette-type flap valve has only flechette-type spool and valve seat to form, and primary sealing area receives erosive wear, the sealing reliability deficiency easily.In order effectively to prevent blowout and well kick in the drill string, guarantee drillng operation safety, press for existing flap valve is carried out optimum design of structuresprogram, the sealing and the functional reliability of blowout prevention instrument in improving.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of new type double sealing flechette-type flap valve is provided, strengthen sealing function when being used for high-pressure situations, reach the double seal effect, this reasonable in design, simple.
The technical scheme that the present invention adopts is: a kind of new type double sealing of the present invention flechette-type flap valve; Comprise that mainly upper valve body, following valve body, flechette-type spool, supporting seat, rubber tube, thrust block pad, spring and spool rear link constitute, said upper valve body is connected with following valve body through screw thread; The upper valve body indoor design has a taper surface, and this taper surface contacts with the flechette-type spool conical surface and forms sealing; In the valve body supporting seat is housed under said; Flechette-type spool rear sleeve is equipped with rubber tube, thrust block pad and spring; Said rubber tube is a drum type; Said spool rear link and supporting seat are through safe snap ring clamping.
Said supporting seat has three side mouths, and at two runner mouths of its top design distribution, the drilling well medium mainly passes through from the side mouth; Described thrust block pad is to be welded to form T shape structure by circular baffle plate and cylinder.
The invention has the advantages that: 1, flechette-type flap valve of the present invention is integrated in upper valve body with valve seat and pressure cap, has enlarged the fluid passage, reduces flow passage resistance force of waterproof; 2, the O-ring seals quantity of the flechette-type flap valve of this structure use reduces, and has improved sealing reliability; 3, this flechette-type flap valve has increased the cydariform rubber tube in the spool rear link, under the high pressure effect of shaft bottom, has been out of shape the secondary seal effect; 4, in the drill bit going down process, the spool of this flechette-type flap valve is forced and connects and fixes, and normal circulation can not sealed runner all the time, and following brill is smooth, is convenient to mud and passes through, and can prevent that downhole fluid from upwards flowing, and helps the well control operation.
Description of drawings
Fig. 1 is the work structuring sketch map of a kind of new type double sealing of the present invention flechette-type flap valve;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural representation of thrust block pad of the present invention;
Fig. 4 is the work structuring sketch map of the present invention under blowout, well kick situation.
Among the figure, 1 upper valve body, 2 taper surfaces, 3 times valve bodies, 4 supporting seats, 5 flechette-type spools, the 6 flechette-type spool conical surfaces, 7 rubber tubes, 8 thrust block pads, 9 springs, 10 safe snap rings, 11 spool rear link, 12 runner mouths, 13 side mouths, 14 circular baffle plate, 15 cylinders.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described further:
As shown in Figure 1; A kind of new type double sealing of the present invention flechette-type flap valve; Comprise that mainly upper valve body 1, following valve body 3, supporting seat 4, flechette-type spool 5, rubber tube 7, thrust block pad 8, spring 9 and spool rear link 11 constitute, said upper valve body 1 is connected with following valve body 3 through screw thread; Upper valve body 1 indoor design has a taper surface 2, and this taper surface 2 contacts with the flechette-type spool conical surface 6 and forms sealing; In the valve body 3 supporting seat 4 is housed under said; Rubber tube 7, thrust block pad 8 and spring 9 are equipped with in flechette-type spool 5 rear portions; Said rubber tube 7 is a drum type; Said spool rear link 11 and supporting seat 4 are through safe snap ring 10 clampings.
As shown in Figure 2, said supporting seat 4 has three side mouths 13, at two runner mouths 12 of its top design distribution; The drilling well medium mainly passes through from side mouth 13, and two runner mouths 12 are used for water conservancy diversion stratum high-pressure fluid, forms the impact force that flechette-type spool 5 is made progress, and effectively destroys safe snap ring 10.
As shown in Figure 3, said thrust block pad 8 is to be welded to form T shape structure by circular baffle plate 14 and cylinder 15, under the high pressure effect of shaft bottom to 7 squeezing actions of rubber tube.
Under the clamping state and running speed when operate as normal; Flechette-type spool 5 is blocked by safe snap ring 10; Keep certain distance between flechette-type spool 5 and the taper surface 2, down-hole drilling fluids gets into flechette-type spool 5 tops smoothly, can realize advancing to starch automatically function; Surge pressure when reducing simultaneously to bore down improves running speed.When injecting the drilling well medium; Impacting flechette-type spool 5 at the drilling well medium overcomes under the situation of spring 9 active forces promotion flechette-type spool 5 downward rapid movements; Thrust block pad 8 lower end cylinders 15 contact with supporting seat 4 to form and support, and stop spring 9 to continue to be compressed, and 9 on spring is pressed and protective effect.
As shown in Figure 4; Duty when well kick or blowout take place, it is up under the impact force action that down-hole high pressure produces, to promote flechette-type spool 5, and spool rear link 11 bayonet sockets destroy the structure of safe snap ring 10; This moment, the flechette-type spool conical surface 6 fitted tightly with upper valve body 1 inner conical face 2; And the thrust block pad under the down-hole high pressure effect 8 constantly compresses rubber tube 7, and rubber tube 7 produces distortion and seals upper valve body 1 passage, forms sealing once more.When pressure was big more, rubber tube 7 distortion were big more, and sealing effectiveness is strengthened, thereby effectively controlled the generation of blowout.Wherein, upper valve body 1 inner conical face 2 adopts plasma spraying antifriction anticorrosion alloy powder with the flechette-type spool conical surface 6, improves that it resistance to wears, erosion resistant ability, effectively improves application life of the present invention.
Claims (3)
1. a new type double seals the flechette-type flap valve; Comprise that mainly upper valve body (1), following valve body (3), supporting seat (4), flechette-type spool (5), rubber tube (7), thrust block pad (8), spring (9) and spool rear link (11) constitute, it is characterized in that: said upper valve body (1) is connected with following valve body (3) through screw thread; Upper valve body (1) indoor design has a taper surface (2), and this taper surface (2) contacts with the flechette-type spool conical surface (6) and forms sealing; In the valve body (3) supporting seat (4) is housed under said; Rubber tube (7), thrust block pad (8) and spring (9) are equipped with in flechette-type spool (5) rear portion; Said rubber tube (7) is a drum type; Described thrust block pad (8) is to be welded to form T shape structure by circular baffle plate (14) and cylinder (15); Said spool rear link (11) and supporting seat (4) are through safe snap ring (10) clamping.
2. a kind of new type double sealing flechette-type flap valve according to claim 1, it is characterized in that: said supporting seat (4) has three side mouths (13), and at its top design distribution two runner mouths (12), the drilling well medium mainly passes through from side mouth (13).
3. a kind of new type double sealing flechette-type flap valve according to claim 1; It is characterized in that: upper valve body (1) inner conical face (2) and the flechette-type spool conical surface (6) adopt plasma spraying one deck antifriction anticorrosion alloy powder, improve that it resistance to wears, erosion resistant ability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100878892A CN102635329A (en) | 2012-03-30 | 2012-03-30 | Novel double-seal arrow-shaped check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100878892A CN102635329A (en) | 2012-03-30 | 2012-03-30 | Novel double-seal arrow-shaped check valve |
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| Publication Number | Publication Date |
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| CN102635329A true CN102635329A (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100878892A Pending CN102635329A (en) | 2012-03-30 | 2012-03-30 | Novel double-seal arrow-shaped check valve |
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| CN (1) | CN102635329A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953312A (en) * | 2014-04-21 | 2014-07-30 | 西南石油大学 | Impeller-driven rotary inner blowout control tool |
| CN104747116A (en) * | 2015-03-26 | 2015-07-01 | 西南石油大学 | Umbrella-shaped downhole blowout preventer used for reducing overflowing risk |
| CN105888610A (en) * | 2016-06-22 | 2016-08-24 | 长江大学 | Arrow-shaped check valve |
| CN106089135A (en) * | 2016-08-29 | 2016-11-09 | 东营市创元石油机械制造有限公司 | Oil drilling arrow formula drilling tool float valve |
| CN107829710A (en) * | 2017-09-12 | 2018-03-23 | 中国海洋石油总公司 | A kind of ring-type valve plate type downhole safety device |
| CN108036083A (en) * | 2017-12-29 | 2018-05-15 | 长江大学 | A kind of eddy current type check-valves |
| CN112113011A (en) * | 2020-10-20 | 2020-12-22 | 中国电子科技集团公司第三十八研究所 | Double-sealing vacuum one-way valve |
| CN113605850A (en) * | 2021-08-27 | 2021-11-05 | 赵龙龙 | Drill rod arrow-shaped check valve for oil exploitation |
| CN113882820A (en) * | 2021-12-08 | 2022-01-04 | 西南石油大学 | Blowout prevention valve in drilling tool |
| CN114109307A (en) * | 2021-12-01 | 2022-03-01 | 西南石油大学 | Erosion-resistant normally-open type internal blowout prevention valve |
| CN117988770A (en) * | 2024-04-01 | 2024-05-07 | 东营威特石油装备有限公司 | Check valve for petroleum drilling |
Citations (6)
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|---|---|---|---|---|
| US4624316A (en) * | 1984-09-28 | 1986-11-25 | Halliburton Company | Super seal valve with mechanically retained seal |
| US4683955A (en) * | 1986-04-30 | 1987-08-04 | Halliburton Company | Automatic fill-up floating apparatus |
| US20030098163A1 (en) * | 2001-11-28 | 2003-05-29 | Hebert John E. | Flow actuated valve for use in a wellbore |
| US20040040718A1 (en) * | 2002-08-27 | 2004-03-04 | Rhodes R. David | Downhole injection system |
| CN2828307Y (en) * | 2005-03-10 | 2006-10-18 | 郑焰 | Arrow drilling tool check valve |
| CN201050341Y (en) * | 2007-06-08 | 2008-04-23 | 苑洪君 | Double safety casing inclined guiding check valve |
-
2012
- 2012-03-30 CN CN2012100878892A patent/CN102635329A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4624316A (en) * | 1984-09-28 | 1986-11-25 | Halliburton Company | Super seal valve with mechanically retained seal |
| US4683955A (en) * | 1986-04-30 | 1987-08-04 | Halliburton Company | Automatic fill-up floating apparatus |
| US20030098163A1 (en) * | 2001-11-28 | 2003-05-29 | Hebert John E. | Flow actuated valve for use in a wellbore |
| US20040040718A1 (en) * | 2002-08-27 | 2004-03-04 | Rhodes R. David | Downhole injection system |
| CN2828307Y (en) * | 2005-03-10 | 2006-10-18 | 郑焰 | Arrow drilling tool check valve |
| CN201050341Y (en) * | 2007-06-08 | 2008-04-23 | 苑洪君 | Double safety casing inclined guiding check valve |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953312B (en) * | 2014-04-21 | 2016-04-13 | 西南石油大学 | Jet-preventing tool in a kind of revolving type of impeller-driven |
| CN103953312A (en) * | 2014-04-21 | 2014-07-30 | 西南石油大学 | Impeller-driven rotary inner blowout control tool |
| CN104747116A (en) * | 2015-03-26 | 2015-07-01 | 西南石油大学 | Umbrella-shaped downhole blowout preventer used for reducing overflowing risk |
| CN104747116B (en) * | 2015-03-26 | 2017-10-03 | 西南石油大学 | It is a kind of to be used to reduce the umbellate form downhole blow-out preventer of overflow risk |
| CN105888610A (en) * | 2016-06-22 | 2016-08-24 | 长江大学 | Arrow-shaped check valve |
| CN105888610B (en) * | 2016-06-22 | 2019-04-19 | 长江大学 | Arrow-shaped check valve |
| CN106089135A (en) * | 2016-08-29 | 2016-11-09 | 东营市创元石油机械制造有限公司 | Oil drilling arrow formula drilling tool float valve |
| CN107829710A (en) * | 2017-09-12 | 2018-03-23 | 中国海洋石油总公司 | A kind of ring-type valve plate type downhole safety device |
| CN107829710B (en) * | 2017-09-12 | 2019-12-06 | 中国海洋石油集团有限公司 | Annular valve plate type underground safety device |
| CN108036083B (en) * | 2017-12-29 | 2023-10-13 | 长江大学 | Vortex type check valve |
| CN108036083A (en) * | 2017-12-29 | 2018-05-15 | 长江大学 | A kind of eddy current type check-valves |
| CN112113011A (en) * | 2020-10-20 | 2020-12-22 | 中国电子科技集团公司第三十八研究所 | Double-sealing vacuum one-way valve |
| CN112113011B (en) * | 2020-10-20 | 2024-06-07 | 中国电子科技集团公司第三十八研究所 | Double-sealing vacuum one-way valve |
| CN113605850A (en) * | 2021-08-27 | 2021-11-05 | 赵龙龙 | Drill rod arrow-shaped check valve for oil exploitation |
| CN114109307A (en) * | 2021-12-01 | 2022-03-01 | 西南石油大学 | Erosion-resistant normally-open type internal blowout prevention valve |
| CN114109307B (en) * | 2021-12-01 | 2022-07-22 | 西南石油大学 | Erosion-resistant normally-open type internal blowout prevention valve |
| CN113882820A (en) * | 2021-12-08 | 2022-01-04 | 西南石油大学 | Blowout prevention valve in drilling tool |
| CN113882820B (en) * | 2021-12-08 | 2022-02-22 | 西南石油大学 | Blowout prevention valve in drilling tool |
| CN117988770A (en) * | 2024-04-01 | 2024-05-07 | 东营威特石油装备有限公司 | Check valve for petroleum drilling |
| CN117988770B (en) * | 2024-04-01 | 2024-05-28 | 东营威特石油装备有限公司 | Check valve for petroleum drilling |
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Application publication date: 20120815 |