CN101178003A - Flechette-type decompression clack-valve for drilling tool - Google Patents
Flechette-type decompression clack-valve for drilling tool Download PDFInfo
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- CN101178003A CN101178003A CNA2007101353528A CN200710135352A CN101178003A CN 101178003 A CN101178003 A CN 101178003A CN A2007101353528 A CNA2007101353528 A CN A2007101353528A CN 200710135352 A CN200710135352 A CN 200710135352A CN 101178003 A CN101178003 A CN 101178003A
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- valve
- flechette
- valve body
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Abstract
The invention relates to an arrow-like pressure relief check valve, pertaining to the technology field of control device. A valve cavity of the valve body is provided with an arrow-like valve and a sealing ring in sequence. The outer ring of the sealing ring is provided with a sealing loop that is fixed by a clamper bolt; the side of the valve body is provided with a through hole that enters into the sealing sing, a control pin is installed and an operating handle is arranged in the outer ring of the valve body. The invention has simple, compact and reasonable structure; the arrow-like valve body leaves the sealing ring to open and lock the pressure relief control pin, then is connected with thread of a drill rod and returns from the control pin; the arrow-like valve releases the pin and contacts the sealing ring upward; the arrow-like valve locks, non-returns and stops oil and gas in the tube; under the function of circulation flow, the arrow-like valve body opens and finishes the circulating pressure well operation.
Description
Technical field
The present invention relates to a kind of Flechette-type decompression clack-valve for drilling tool, when being used for oil gas well drilling operation well head generation blowout, have pressure release, check function, with oil gas in the blocking tube.Belong to the control device technical field.
Background technology
In existing technology, drilling tool flechette-type flap valve has only the non-return effect.Blowout or overflow take place when pulling out of hole, owing to have oil-air pressure in the drilling tool, the flechette-type valve cuts out.When connecting with drilling rod, because the pressure effect makes the failure that is threaded, uncontrollable well head causes blowout out of control, the serious consequence that causes the significant wastage of petroleum resources even people, machine to endanger.Therefore, be badly in need of solving the function of present flechette-type flap valve in the well head pressure release.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, thereby a kind of Flechette-type decompression clack-valve for drilling tool is provided, it can be controlled locking, closes, oil gas in the non-return, blocking tube; Under the circulating fluid effect, the flechette-type valve body is opened and is finished the circulation kill job.
Main solution of the present invention is achieved in that
The present invention mainly adopts pack into successively flechette-type valve, joint ring in the valve pocket of valve body.Joint ring is equipped with sealing ring outward, is fixed with clamping nut, is provided with a through hole to joint ring in the valve body side, the control pin of wherein packing into, or the control pin is located at flechette-type valve skirt section.
There is circulation port in flechette-type valve skirt section, and the control pin moves to stop on the flechette-type body after inserting arrow shaft.
Compared with the prior art the present invention has the following advantages:
The present invention is simple, compact and reasonable for structure; The flechette-type valve body leaves joint ring, opens pressure release, and the control lock is fixed; After drill rod thread connects, withdraw from the control pin, the flechette-type valve body unlocks, and the conical surface contacts with joint ring, and the flechette-type valve cuts out, non-return, the interior oil gas of blocking tube; Under the circulating fluid effect, the flechette-type valve body is opened and is finished the circulation kill job; For preventing the circulation of drilling fluid erosion, the control pin does not directly expose in drilling fluid; And the flechette-type valve adopts anticorrosion, high-abrasive material; Connect for ease of well head, be provided with two action bars on body top.
Description of drawings
Fig. 1 is a flechette-type opening of valves pressure relief schematic diagram of the present invention.
Fig. 2 closes for flechette-type valve of the present invention, the non-return structure schematic diagram.
Fig. 3 is a flechette-type opening of valves loop structure schematic diagram of the present invention.
Fig. 4 is flechette-type valve packing ring control latch structure schematic diagram of the present invention.
Fig. 5 is flechette-type valve of the present invention skirt section control latch structure schematic diagram.
The specific embodiment
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
Embodiment one:
The present invention mainly is made up of valve body 1, joint ring 2, control pin 3, flechette-type valve 4, operating grip 5, hold-down bolt 6, sealing ring 7 etc.
The present invention mainly adopts pack into successively flechette-type valve 4, joint ring 2 in the valve pocket of valve body 1, sealing ring 7 is equipped with in the joint ring outer ring, is fixed with hold-down bolt 6, be provided with a through hole in valve body 1 side, through hole is to joint ring 2, and the control pin 3 of wherein packing into is equipped with operating grip 5 in valve body 1 outer ring.
Implement two:
Described control pin 3 is located at flechette-type valve skirt section, is provided with the hole on flechette-type valve skirt section, and the control pin inserts to stop on the flechette-type body and moves.When there was pressure in well head, the flechette-type valve can not cut out, but the venting well head pressure, so that thread connection.Another feature of the present invention is that described control pin 3 is located at joint ring 2 inside.
Claims (5)
1. Flechette-type decompression clack-valve for drilling tool, it is characterized in that adopting in the valve pocket of valve body (1), pack into successively flechette-type valve (4), joint ring (2), sealing ring (7) is equipped with in joint ring (2) outer ring, is provided with through hole to joint ring (2) in valve body (1) side, the control pin (3) of wherein packing into.
2. Flechette-type decompression clack-valve for drilling tool according to claim 1 is characterized in that described valve body (1) outer ring is equipped with operating grip (5).
3. Flechette-type decompression clack-valve for drilling tool according to claim 1 is characterized in that described control pin (3) is located at flechette-type valve skirt section.
4. Flechette-type decompression clack-valve for drilling tool according to claim 3 is characterized in that described flechette-type valve skirt section is provided with circulation port.
5. Flechette-type decompression clack-valve for drilling tool according to claim 1 is characterized in that described control pin (3) is located at joint ring (2) inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101353528A CN101178003B (en) | 2007-11-07 | 2007-11-07 | Flechette-type decompression clack-valve for drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101353528A CN101178003B (en) | 2007-11-07 | 2007-11-07 | Flechette-type decompression clack-valve for drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101178003A true CN101178003A (en) | 2008-05-14 |
| CN101178003B CN101178003B (en) | 2011-03-16 |
Family
ID=39404400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101353528A Active CN101178003B (en) | 2007-11-07 | 2007-11-07 | Flechette-type decompression clack-valve for drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101178003B (en) |
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2007
- 2007-11-07 CN CN2007101353528A patent/CN101178003B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101178003B (en) | 2011-03-16 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |