CN202349291U - Reinforced type sealed arrow-shaped check valve - Google Patents
Reinforced type sealed arrow-shaped check valve Download PDFInfo
- Publication number
- CN202349291U CN202349291U CN2011205211369U CN201120521136U CN202349291U CN 202349291 U CN202349291 U CN 202349291U CN 2011205211369 U CN2011205211369 U CN 2011205211369U CN 201120521136 U CN201120521136 U CN 201120521136U CN 202349291 U CN202349291 U CN 202349291U
- Authority
- CN
- China
- Prior art keywords
- sealing
- valve body
- hole
- step surface
- upper hole
- 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
Images
Landscapes
- Check Valves (AREA)
Abstract
The utility model discloses a reinforced type sealed arrow-shaped check valve, comprising a valve body and a sealing piece, wherein an upper hole of the valve body is internally provided with a press cap which is matched with the inner wall of the valve body through a thread, the lower end of the press cap clings to a sealing box, the periphery of the sealing box is closely connected with the inner wall of the valve body and a groove at the periphery of the sealing box is provided with an 'O'-shaped ring; a dividing line between a middle hole and the upper hole is located below the sealing box; the upper hole is provided with a circle of step surface at the dividing line, corresponding to the middle hole; the step surface is provided with a sealing ring; and a flat surface matched with the step surface is arranged below a tapered part on the sealing piece. By adopting the technical scheme provided by the utility model, the reinforced type sealed arrow-shaped check valve is high in strength and resists high temperature, high pressure and erosion of drilling liquid; the whole property is very good; the rigidity of the sealing box and the tapered part of the sealing piece is high; and the reinforced type sealed arrow-shaped check valve has the advantages of reliable blocking, good sealing performance and long service life.
Description
Technical field
The utility model relates to the control valve technical field in oil, the gas well operation, is specifically related to a kind of flechette-type safety check of reinforced sealing.
Background technique
The flechette-type safety check is widely used in oil, the gas well operation; Be to be used for one of drill string blowout preventer tool in oil, the gas drilling process; Its effect is when overflow in drilling process, occurring or blowout pressure being arranged, and safety check is connected in the drill string, and safety check is automatic shutoff hydrophthalmia under up drilling liquid pressure effect; Allow drilling fluid to flow from top to bottom, but do not allow drilling fluid upwards to flow.
At present, safety check oily, that gas well is commonly used has ball check valve, butterfly shaped check valve, drop-in check valve, drilling tool float valve etc.Its shortcoming is that the life-span of the hot environment in the down-hole is shorter; Fragile, not erosion resistance and corrosion, overall performance is relatively poor, and the structure more complicated; Processing and operation easier are big; Be prone to cause the situation of uncontrollable well head and blowout, cause the significant wastage of oil, gas resource, even work the mischief and cause heavy losses to machinery to personal safety.Therefore be badly in need of wanting a kind of simple and reliable safety check to solve these problems.
The model utility content
The utility model has overcome the deficiency of existing technology, and a kind of flechette-type safety check of reinforced sealing of good sealing effect is provided.
For solving above-mentioned technical problem, the utility model adopts following technological scheme:
A kind of flechette-type safety check of reinforced sealing comprises valve body and Sealing, is provided with pressure cap in the upper hole of this valve body; Said pressure cap cooperates with the inwall of valve body through screw thread, and said pressure cap lower end is glued with sealing case, and the circumference of said sealing case closely is connected with the inwall of valve body; And in the groove of the circumference of sealing case, be provided with " O " type circle, said sealing case bottom is a tapered recess, and pressure cap is passed on said Sealing top; The lower end of said Sealing is provided with down seat, and said Sealing is provided with the tapered portion that cooperates with said tapered recess, and said following lower end is positioned at the shoulder hole of valve body lower portion; Said following is provided with the hole that is used for through liquid medium; The diameter of said valve body mider hole is greater than the diameter of upper hole, and the boundary of said mider hole and upper hole is positioned at the below of sealing case, and the relative mider hole of said upper hole forms a circle step surface at the boundary place; Said step surface is provided with seal ring, and the tapered portion below on the said Sealing is provided with the plane that cooperates with step surface.
In order to realize the utility model better, on above-mentioned technological scheme basis, make further improvement below:
As preferably: the distance of above-mentioned sealing case lower end and step surface is 5-10 centimetre.
As preferably: above-mentioned " O " type circle is two.
Compared with prior art, the beneficial effect of the utility model is:
Through using the technological scheme of the utility model, have intensity height, high temperature resistant, high pressure resistant, anti-drilling fluid erosion, overall performance is very good; Sealing case and Sealing tapering hardness are high, and shutoff is reliable, good seal performance, its long service life; Be connected reliably easy accessibility with other drilling tool;
This apparatus structure is simple in addition, low price, easy to use, maintenance; Because borehole pressure possibly surpass drilling liquid pressure, drilling fluid is pushed along the upwards ejection of drill string hydrophthalmia, uses the flechette-type safety check can play the protection water hose and is not suppressed bad by high pressure; Prevent the ejection of high pressure oil, gas, can also reduce environmental pollution simultaneously, prevent the effect of overflow, blowout.
Description of drawings
Fig. 1 is the utility model embodiment 1 a structural representation;
Fig. 2 is the utility model embodiment 2 a structural representation.
Wherein, the pairing name of the reference character in the accompanying drawing is called:
The 1-valve body, 2-Sealing, 3-upper hole, 4-pressure cap, 5-sealing case, 6-" O " type circle, 7-tapered recess, following of 8-, 9-tapered portion, 10-shoulder hole, 11-mider hole, 12-step surface, 13-seal ring, 14-plane.
Embodiment
Below in conjunction with embodiment the utility model is done to specify further, but the mode of execution of the utility model is not limited thereto.
As shown in Figure 1, a kind of flechette-type safety check of reinforced sealing comprises valve body 1 and Sealing 2; Be provided with pressure cap 4 in the upper hole 3 of this valve body 1, said pressure cap 4 cooperates with the inwall of valve body 1 through screw thread, and said pressure cap 4 lower ends are glued with sealing case 5; The circumference of said sealing case 5 closely is connected with the inwall of valve body 1, and in the groove of the circumference of sealing case 5, is provided with " O " type circle 6, and said sealing case 5 bottoms are tapered recess 7; Pressure cap 4 is passed on said Sealing 2 tops; The lower end of said Sealing 2 is provided with down seat 8, and said Sealing 2 is provided with the tapered portion 9 that cooperates with said tapered recess 7, and said following 8 lower end is positioned at the shoulder hole 10 of valve body 1 bottom; Said following 8 is provided with the hole that is used for through liquid medium; It is characterized in that: the diameter of said valve body 1 mider hole 11 is greater than the diameter of upper hole 3, and the boundary of said mider hole 11 and upper hole 3 is positioned at the below of sealing case 5, and said upper hole 3 relative mider holes 11 form a circle step surface 12 at the boundary place; Said step surface 12 is provided with seal ring 13, and tapered portion 9 belows on the said Sealing 2 are provided with the plane 14 that cooperates with step surface 12.
The distance of above-mentioned sealing case 5 lower ends and step surface 12 is 5 centimetres.
Above-mentioned " O " type circle 6 is one.
As shown in Figure 2, a kind of flechette-type safety check of reinforced sealing comprises valve body 1 and Sealing 2; Be provided with pressure cap 4 in the upper hole 3 of this valve body 1, said pressure cap 4 cooperates with the inwall of valve body 1 through screw thread, and said pressure cap 4 lower ends are glued with sealing case 5; The circumference of said sealing case 5 closely is connected with the inwall of valve body 1, and in the groove of the circumference of sealing case 5, is provided with " O " type circle 6, and said sealing case 5 bottoms are tapered recess 7; Pressure cap 4 is passed on said Sealing 2 tops; The lower end of said Sealing 2 is provided with down seat 8, and said Sealing 2 is provided with the tapered portion 9 that cooperates with said tapered recess 7, and said following 8 lower end is positioned at the shoulder hole 10 of valve body 1 bottom; Said following 8 is provided with the hole that is used for through liquid medium; It is characterized in that: the diameter of said valve body 1 mider hole 11 is greater than the diameter of upper hole 3, and the boundary of said mider hole 11 and upper hole 3 is positioned at the below of sealing case 5, and said upper hole 3 relative mider holes 11 form a circle step surface 12 at the boundary place; Said step surface 12 is provided with seal ring 13, and tapered portion 9 belows on the said Sealing 2 are provided with the plane 14 that cooperates with step surface 12.
The distance of above-mentioned sealing case 5 lower ends and step surface 12 is 10 centimetres.
Above-mentioned " O " type circle 6 is two.
In sum, just can realize the utility model preferably.
Claims (3)
1. the flechette-type safety check of a reinforced sealing; Comprise valve body (1) and Sealing (2), be provided with pressure cap (4) in the upper hole (3) of this valve body (1), said pressure cap (4) cooperates with the inwall of valve body (1) through screw thread; Said pressure cap (4) lower end is glued with sealing case (5); The circumference of said sealing case (5) closely is connected with the inwall of valve body (1), and in the groove of the circumference of sealing case (5), is provided with " O " type circle (6), and said sealing case (5) bottom is tapered recess (7); Pressure cap (4) is passed on said Sealing (2) top; The lower end of said Sealing (2) is provided with down seat (8), and said Sealing (2) is provided with the tapered portion (9) that cooperates with said tapered recess (7), and the lower end of said following (8) is positioned at the shoulder hole (10) of valve body (1) bottom; Said following (8) are provided with the hole that is used for through liquid medium; It is characterized in that: the diameter of said valve body (1) mider hole (11) is greater than the diameter of upper hole (3), and the boundary of said mider hole (11) and upper hole (3) is positioned at the below of sealing case (5), and said upper hole (3) mider hole (11) relatively forms a circle step surface (12) at the boundary place; Said step surface (12) is provided with seal ring (13), and tapered portion (9) below on the said Sealing (2) is provided with the plane (14) that cooperates with step surface (12).
2. the flechette-type safety check of reinforced sealing according to claim 1, it is characterized in that: the distance of said sealing case (5) lower end and step surface (12) is 5～10 centimetres.
3. the flechette-type safety check of reinforced sealing according to claim 1, it is characterized in that: said " O " type circle (6) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205211369U CN202349291U (en) | 2011-12-14 | 2011-12-14 | Reinforced type sealed arrow-shaped check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205211369U CN202349291U (en) | 2011-12-14 | 2011-12-14 | Reinforced type sealed arrow-shaped check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202349291U true CN202349291U (en) | 2012-07-25 |
Family
ID=46538298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205211369U Expired - Fee Related CN202349291U (en) | 2011-12-14 | 2011-12-14 | Reinforced type sealed arrow-shaped check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202349291U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917893A (en) * | 2015-12-28 | 2017-07-04 | 中国石油天然气股份有限公司 | Block up pressure-measuring valve |
| US10330209B2 (en) | 2017-01-26 | 2019-06-25 | Fresenius Medical Care Holdings, Inc. | Check valve and method of forming a check valve |
-
2011
- 2011-12-14 CN CN2011205211369U patent/CN202349291U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917893A (en) * | 2015-12-28 | 2017-07-04 | 中国石油天然气股份有限公司 | Block up pressure-measuring valve |
| CN106917893B (en) * | 2015-12-28 | 2019-01-18 | 中国石油天然气股份有限公司 | Block up pressure-measuring valve |
| US10330209B2 (en) | 2017-01-26 | 2019-06-25 | Fresenius Medical Care Holdings, Inc. | Check valve and method of forming a check valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101644149B (en) | Integral type level oil extraction wellhead equipment | |
| CN204002658U (en) | Arrow type flap valve | |
| CN102635329A (en) | Novel double-seal arrow-shaped check valve | |
| CN202349291U (en) | Reinforced type sealed arrow-shaped check valve | |
| CN201460812U (en) | Arrow-shaped check valve | |
| CN202914024U (en) | Float collar | |
| CN201486503U (en) | Integrated type horizontal oil extraction wellhead device | |
| CN202047782U (en) | Swabbing steel wire rope spray-prevention device | |
| CN201778758U (en) | Coiled tubing back-pressure valve | |
| CN208203219U (en) | A kind of interior blowout-preventing ball seat | |
| CN102162344B (en) | Blowout prevention box for pumping steel wire rope | |
| CN204729687U (en) | Lifting check valve | |
| CN210768705U (en) | Blowout prevention wellhead Christmas tree device | |
| CN202946106U (en) | Grouting-free forcing type float collar | |
| CN206360685U (en) | A kind of marine drilling irrigates valve control system with deep-sea marine riser | |
| CN201934052U (en) | Multifunctional downhole device capable of negative-pressure block removal and anti-backflow hole cleaning | |
| CN205778710U (en) | A kind of packer | |
| CN206035436U (en) | Integrated wellhead assembly is adopted to marine notes | |
| CN205743818U (en) | Wellhead blowout preventer | |
| CN203161174U (en) | Gas-lift valve | |
| CN203559860U (en) | Durable rubber tube of packer | |
| CN2871821Y (en) | Blowout preventer on hole top for wireline logging | |
| CN202483501U (en) | Top blanking plug of underwater Christmas tree | |
| CN212406636U (en) | Flat top arrow shape check valve | |
| CN205154102U (en) | Drilling rod floating valve |
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: 20120725 Termination date: 20161214 |