CN204002658U - Arrow type flap valve - Google Patents
Arrow type flap valve Download PDFInfo
- Publication number
- CN204002658U CN204002658U CN201420406521.2U CN201420406521U CN204002658U CN 204002658 U CN204002658 U CN 204002658U CN 201420406521 U CN201420406521 U CN 201420406521U CN 204002658 U CN204002658 U CN 204002658U
- Authority
- CN
- China
- Prior art keywords
- arrow
- valve
- valve core
- forms
- valve seat
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 20
- 239000012530 fluid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
Landscapes
- Check Valves (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The utility model discloses a kind of arrow type flap valve, comprise body, positioning tube, valve seat, arrow valve core and back-moving spring, the inner peripheral surface of valve seat lower end forms the conical surface; Positioning tube is arranged on above valve seat, for fixed valve base; The outer peripheral face of arrow valve core upper end inwardly shrinks, and forms the conical surface coordinating with the conical surface seal of valve seat lower end; The outer peripheral face at the arrow valve core middle part formation upper shoulder that stretches out, the external diameter of upper shoulder adapts with the internal diameter in the middle part of body; The external diameter of arrow valve core bottom is less than the external diameter at its middle part, forms lower shoulder at reducing place, is positioned at a plurality of runners hole that has circumferential distribution on the wall on upper shoulder at arrow valve core; The internal diameter of body bottom is less than the internal diameter at its middle part, at reducing place, forms a step, and the external diameter of arrow valve core bottom and the internal diameter of body bottom adapt, and back-moving spring is arranged in the space between upper shoulder and step.This valve overall structure is simple, easy accessibility, and sealing is reliable, long service life.
Description
Technical field
The utility model relates to oil gas well drilling field, particularly relates to a kind of drilling tool check valve.
Background technology
Drilling tool check valve is a kind of interior jet-preventing tool using in drilling process.In normal drilling process, drilling fluid is opened this valve under pressure.When stopping circulation of drilling fluid or well kick blowout occurs, in back-moving spring and drill string, under the effect of bottom pressure, this valve cuts out automatically, can effectively prevent that drilling fluid from refluxing in drill string.
But, current arrow type flap valve exists unreasonable structure, application life shorter shortcoming, particularly back-moving spring and is exposed in drilling fluid passage, under drilling fluid erosion effect, easily cause the damage in advance of back-moving spring, thereby cause the inefficacy of arrow type flap valve.
Summary of the invention
The purpose of this utility model is to be to provide a kind of erosion resistance, long arrow type flap valve of life-span.
For this reason, the utility model adopts following technical scheme:
An arrow type flap valve, comprises body, positioning tube, valve seat, arrow valve core and back-moving spring,
Described valve seat is arranged on the step that body interior forms and between the two, forms sealing, and the inner peripheral surface of valve seat lower end forms the conical surface of gradually opening downwards;
Described positioning tube is arranged on above described valve seat, and is threaded connection with body, for fixed valve base;
The outer peripheral face of described arrow valve core upper end inwardly shrinks, and forms the conical surface coordinating with the conical surface seal of valve seat lower end, at the conical surface place of the two, is covered with respectively carbide stainless steel coating; The outer peripheral face at the arrow valve core middle part formation upper shoulder that stretches out, the external diameter of upper shoulder adapts with the internal diameter in the middle part of body; The external diameter of arrow valve core bottom is less than the external diameter at its middle part, forms lower shoulder at reducing place, is positioned at a plurality of runners hole that has circumferential distribution on the wall on upper shoulder at arrow valve core; The internal diameter of body bottom is less than the internal diameter at its middle part, at reducing place, forms a step, and the external diameter of arrow valve core bottom and the internal diameter of body bottom adapt, and described back-moving spring is arranged in the space between described upper shoulder and described step.
Preferably, described back-moving spring is volute spring.
The present invention has following beneficial effect:
1, overall structure is simple, easy accessibility, and sealing is reliable, long service life;
2, back-moving spring is arranged on the bottom of the shoulder forming on arrow valve core, can effectively avoid the erosion attack of spring, and in addition, the lower shoulder on arrow valve core has limit function, prevents that the overvoltage of back-moving spring from damaging.
Accompanying drawing explanation
Fig. 1 is the closed condition schematic diagram of the utility model arrow type flap valve;
Fig. 2 is the opening schematic diagram of the utility model arrow type flap valve.
In figure:
1. body 2. positioning tube 3. valve seat 4. hard alloy layers
5. arrow valve core 6. back-moving spring 7. pin thread 8. boxes
9.O shape sealing ring 10. runner hole 11. upper shoulder 12. lower shoulders.
The specific embodiment
Below in conjunction with accompanying drawing, the structure of arrow type flap valve of the present invention is elaborated.
As depicted in figs. 1 and 2, this arrow type flap valve comprises: body 1, positioning tube 2, valve seat 3, arrow valve core 5 and back-moving spring 6.
Body 1 upper end is connected with drilling rod by drilling rod box 8, and lower end is connected with another drilling rod by drilling rod pin thread 7.Valve seat 3 is arranged on the inner step forming of body 1, between valve seat 3 and body 1, by O-ring seals 9, forms sealing, and valve seat 3 inner peripheral surface lower ends form the conical surface of gradually opening downwards.
Positioning tube 2 is positioned on valve seat 3 and with body 1 and is threaded connection, and valve seat 3 is fixed by positioning tube 2.The outer peripheral face of arrow valve core 5 upper ends inwardly shrinks the formation conical surface, and coordinates with the conical surface seal of valve seat 3 lower ends formation, is covered with the carbide stainless steel coating 4 of surfacing at the conical surface place of the two.The outer peripheral face at arrow valve core 5 middle parts stretches out and forms upper shoulder 11, and the internal diameter at the external diameter of upper shoulder 11 and body 1 middle part adapts.The external diameter of arrow valve core 5 bottoms is less than the external diameter at its middle part, forms lower shoulder 12 at reducing place, is positioned at a plurality of runners hole 10 that has circumferential distribution on the wall on upper shoulder 11 at arrow valve core 5.The internal diameter of body 1 bottom is less than the internal diameter at its middle part, at reducing place, form a step, the internal diameter of the external diameter of arrow valve core 5 bottoms and body 1 bottom adapts, described back-moving spring 6 is arranged in the space between described upper shoulder 11 and described step, can effectively avoid the erosion of drilling fluid to back-moving spring 6.The preferential volute spring that adopts of described back-moving spring 6.
Arrow valve core 5 moves up under the effect of back-moving spring 6, can contact sealing with valve seat 3; Arrow valve core 5 can be displaced downwardly to arrow valve core 5 lower shoulders 12 and body 1 interior step touching position under the external pressure that overcomes back-moving spring 6 resistances simultaneously, retains certain space to back-moving spring 6, thereby can effectively avoid back-moving spring 6 because overvoltage damages.
Operating principle of the present utility model is as follows:
In normally creeping into, arrow valve core 5 overcomes back-moving spring 6 resistances and moves down under drilling liquid pressure effect, and arrow valve core 5 lower shoulders 12 contact with body 1 interior step, play again position-limiting action when opening arrow valve.Drilling fluid enters in lower drilling string through sealing surface and the runner hole 10 of arrow valve core 5.When drilling fluid stops circulation or well kick blowout occurs, arrow valve core 5 moves under back-moving spring 6 and inner drilling well action of hydraulic force, and the conical surface of arrow valve core 5 contacts sealing with the conical surface of valve seat 3, thereby seals the passage in drill string.
Claims (2)
1. an arrow type flap valve, comprises body (1), positioning tube (2), valve seat (3), arrow valve core (5) and back-moving spring (6), it is characterized in that:
Described valve seat (3) is arranged on the inner step forming of body (1) and between the two, forms sealing, and the inner peripheral surface of valve seat (3) lower end forms the conical surface of gradually opening downwards;
Described positioning tube (2) is arranged on described valve seat (3) above, and is threaded connection with body (1), for fixed valve base (3);
The outer peripheral face of described arrow valve core (5) upper end inwardly shrinks, and forms the conical surface coordinating with the conical surface seal of valve seat (3) lower end, at the conical surface place of the two, is covered with respectively carbide stainless steel coating (4); The outer peripheral face at arrow valve core (5) middle part stretches out and forms upper shoulder (11), and the internal diameter at the external diameter of upper shoulder (11) and body (1) middle part adapts; The external diameter of arrow valve core (5) bottom is less than the external diameter at its middle part, forms lower shoulder (12) at reducing place, is positioned at a plurality of runners hole (10 that has circumferential distribution on the wall on upper shoulder (11) at arrow valve core (5); The internal diameter of body (1) bottom is less than the internal diameter at its middle part, at reducing place, form a step, the internal diameter of the external diameter of arrow valve core (5) bottom and body (1) bottom adapts, and described back-moving spring (6) is arranged in the space between described upper shoulder (11) and described step.
2. arrow type flap valve according to claim 1, is characterized in that: described back-moving spring (6) is volute spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420406521.2U CN204002658U (en) | 2014-07-22 | 2014-07-22 | Arrow type flap valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420406521.2U CN204002658U (en) | 2014-07-22 | 2014-07-22 | Arrow type flap valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002658U true CN204002658U (en) | 2014-12-10 |
Family
ID=52042678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420406521.2U Expired - Fee Related CN204002658U (en) | 2014-07-22 | 2014-07-22 | Arrow type flap valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204002658U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107310872A (en) * | 2017-07-31 | 2017-11-03 | 辽宁地质工程职业学院 | Fusing soldering welder oil storage tank or oil storage barrel fuel tap and its oil storage tank, oil storage barrel and oil syringe |
| CN108798591A (en) * | 2018-06-12 | 2018-11-13 | 武汉理工大学 | A kind of arrow-shaped check valve |
| CN110878680A (en) * | 2019-10-28 | 2020-03-13 | 大庆石油管理局有限公司 | Casing pipe lowering pressure-building one-way valve |
| CN117052331A (en) * | 2023-10-12 | 2023-11-14 | 牡丹江通用石油工具有限公司 | Arrow-shaped pressure relief check valve of drilling tool |
-
2014
- 2014-07-22 CN CN201420406521.2U patent/CN204002658U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107310872A (en) * | 2017-07-31 | 2017-11-03 | 辽宁地质工程职业学院 | Fusing soldering welder oil storage tank or oil storage barrel fuel tap and its oil storage tank, oil storage barrel and oil syringe |
| CN108798591A (en) * | 2018-06-12 | 2018-11-13 | 武汉理工大学 | A kind of arrow-shaped check valve |
| CN110878680A (en) * | 2019-10-28 | 2020-03-13 | 大庆石油管理局有限公司 | Casing pipe lowering pressure-building one-way valve |
| CN117052331A (en) * | 2023-10-12 | 2023-11-14 | 牡丹江通用石油工具有限公司 | Arrow-shaped pressure relief check valve of drilling tool |
| CN117052331B (en) * | 2023-10-12 | 2024-01-05 | 牡丹江通用石油工具有限公司 | Arrow-shaped pressure relief check valve of drilling tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204002658U (en) | Arrow type flap valve | |
| CN202990942U (en) | Double-seal Christmas tree for conveniently mounting coiled tubing | |
| CN204312036U (en) | A pressure difference type downhole restrictor gas nozzle | |
| CN104847306B (en) | A kind of underground rod tube safety valve | |
| CN204060585U (en) | Continuous circulation valve | |
| CN203374239U (en) | Pressure-relievable check valve | |
| CN202645504U (en) | Alloy plug valve | |
| CN204436328U (en) | With the seat sliding sleeve of elastic ball | |
| CN201196062Y (en) | Gas lift valve | |
| CN204754881U (en) | Double -barrelled gas well flow string parallels | |
| CN202914024U (en) | Float collar | |
| CN201730574U (en) | Wellhead device oil pipe hanging metal sealing device | |
| CN201460812U (en) | An Arrow Check Valve | |
| CN104180029A (en) | Screwing opening type check valve capable of balancing pressure automatically | |
| CN203394438U (en) | Annulus safety valve for electric pump well | |
| CN204252962U (en) | A Downhole Mobile Automatic Intermittent Water Lifting Tool | |
| CN204083312U (en) | A kind of temperature-decreased pressure reducer improveing spool | |
| CN102162344B (en) | Blowout prevention box for pumping steel wire rope | |
| CN104358546A (en) | A Downhole Mobile Automatic Intermittent Water Lifting Tool | |
| CN202349291U (en) | Reinforced type sealed arrow-shaped check valve | |
| CN206592099U (en) | Anti- return of one kind tells ball-and-seat | |
| CN204114247U (en) | A kind of Swing check valve of self-balancing pressure | |
| CN201778757U (en) | Internal production tree cap of subsea production tree | |
| CN103527454B (en) | A kind of blocking type anti-jetting oil pump | |
| CN204283308U (en) | A kind of oil well blowout hookup |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20190722 |