CN2089067U - Check valve for drill pipe - Google Patents
Check valve for drill pipe Download PDFInfo
- Publication number
- CN2089067U CN2089067U CN 90212636 CN90212636U CN2089067U CN 2089067 U CN2089067 U CN 2089067U CN 90212636 CN90212636 CN 90212636 CN 90212636 U CN90212636 U CN 90212636U CN 2089067 U CN2089067 U CN 2089067U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve seat
- seat
- valve body
- drilling rod
- 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.)
- Withdrawn
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- Taps Or Cocks (AREA)
- Check Valves (AREA)
- Safety Valves (AREA)
Abstract
The utility model provides a check valve for drill pipes, which is used for preventing the well blowout. The check valve for drill pipes mainly comprises a valve body, a valve seat and a valve core. The utility model is characterized in that a circular ring fixed by a rib is arranged in the valve seat; the hole of the circular ring is used for guiding the valve core. Two O-shaped seal rings are arranged on the outer column surface of the valve seat and respectively positioned in a circular groove. The screw connection part of the valve seat and the valve body are sealed by the two O-shaped seal rings for preventing the corrosion caused by being polluted by drilling fluid. Thereby, the screw connection part can be disassembled easily from the valve seat for regrinding a sealing face or replacing a new valve seat, and the whole valve can not be scrapped for the difficulty disassembly. In addition, the check valve for drill pipes is in closed state by a compression spring acting on the valve core.
Description
The utility model relates to a kind of drilling rod ball-and-seat that is used to prevent blowout.
In prior art, a kind of flechette-type back pressure valve is arranged, also be a type of drilling rod ball-and-seat.It mainly is made up of valve body, valve seat and spool.Weak point is that the valve seat of this drilling rod ball-and-seat is fixed in the valve body with a threaded pressure cap.Because the continuous erosion of drilling fluid, make the taper seat of valve seat be subjected in various degree damage, valve seat must be taken out, so that grind taper seat again, the valve seat that perhaps more renews.But, pressure cap also because of connecting thread by the drilling fluid contamination corrosion, pressure cap can't be taken apart, also can't take out valve seat.As a result, whole drilling rod ball-and-seat have to be scrapped.In addition, owing to there is not the compression spring action between spool and the valve body, the drilling rod ball-and-seat is in opening.If blowout takes place in trip-out process, to lag behind some time because close the drilling rod ball-and-seat, the drilling fluid in the drilling rod sprays some always and comes out, and brings certain harm to the operating personnel on the rig floor.
The purpose of this utility model is to avoid above-mentioned weak point of the prior art and a kind of improved drilling rod ball-and-seat is provided.
The purpose of this utility model can reach by following measure: a kind of drilling rod ball-and-seat, it comprises valve body, spool and valve seat.Its special character is on the valve seat that the other end with respect to conical bore has one to be fixed in annulus on the endoporus with rib, and the annulus hole is used for spool is led.The twice cannelure is arranged on the external cylindrical surface of valve seat, and two O-ring seals lay respectively in the cannelure, with the be threaded part sealing column of valve seat with valve body.In addition, a vertically compression spring of effect is installed between valve body and the spool, makes the drilling rod ball-and-seat be in closure state.
The purpose of this utility model can also reach by following measure: compression spring employing diameter is that 4 millimeters spring steel wire is made.
The utility model has following advantage compared to existing technology:
1. because valve seat has two O-ring seals that it is sealed with the part that is threaded of valve body, make its corrosion, thereby can with comparalive ease valve seat be taken apart, so that grind taper seat again not by drilling fluid contamination, perhaps more renew valve seat, whole valve is scrapped.
2. because a vertically compression spring of effect has been installed between spool and the valve body, make this valve be in closure state.If blowout takes place in trip-out process, will never come out from some drilling fluids of spray in the drilling rod.
The drawing of accompanying drawing is described as follows:
Fig. 1 is vertical full sectional view of the present utility model.
The utility model is further described below in conjunction with accompanying drawing:
There is a valve body (1) outside of drilling rod ball-and-seat shown in Figure 1, and valve seat (5) is with being threaded in the hole of valve body (1).O-ring seals (4), (6) lay respectively in the twice cannelure of valve seat (5), and valve seat (5) is sealed up with the part that is threaded of valve body (1), make its corrosion not by drilling fluid contamination.There is one to be fixed in annulus on the endoporus with respect to the other end of valve seat (5) conical bore with rib.Spool (3) is positioned at the hole of valve body (1), and a vertically compression spring (2) of effect is installed between the two, and the outer conical surface of spool (3) is withstood on the internal conical surface of valve seat (5), makes the drilling rod ball-and-seat be in closure state.Simultaneously, the last circular cone small end guide peg of spool (3) passes the annulus hole on the valve seat (5), with realization spool (3) is led.
Claims (2)
1, a kind of drilling rod ball-and-seat that is used to prevent blowout, it comprises valve body (1), spool (3) and valve seat (5), it is characterized in that valve seat (5) goes up the other end with respect to conical bore and have one to be fixed in annulus on the endoporus with rib, the annulus hole is used for spool (3) is led, on the external cylindrical surface of valve seat (5) the twice cannelure is arranged, 0 shape sealing ring (4), (6) lay respectively in the cannelure, valve seat (5) is sealed up with the part that is threaded of valve body (1), in addition, a vertically compression spring (2) of effect is installed between valve body (1) and the spool (3), makes the drilling rod ball-and-seat be in closure state.
2, drilling rod ball-and-seat according to claim 1, it is characterized in that compressing spring＜2 〉, to adopt diameter be that 4 millimeters spring steel wire is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212636 CN2089067U (en) | 1990-05-09 | 1990-05-09 | Check valve for drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212636 CN2089067U (en) | 1990-05-09 | 1990-05-09 | Check valve for drill pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2089067U true CN2089067U (en) | 1991-11-20 |
Family
ID=4892173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90212636 Withdrawn CN2089067U (en) | 1990-05-09 | 1990-05-09 | Check valve for drill pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2089067U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812981A (en) * | 2010-04-17 | 2010-08-25 | 西南石油大学 | Mechanical underground all-in-one blowout preventer |
| WO2010135902A1 (en) * | 2009-05-27 | 2010-12-02 | 泸州川油钻采工具有限公司 | High-low pressure pilot valve |
| CN103939028A (en) * | 2013-01-22 | 2014-07-23 | 成都大漠石油机械有限公司 | Drill stem connection device capable of preventing jet of mud |
| CN106996279A (en) * | 2017-06-02 | 2017-08-01 | 成都市卓新实业有限公司 | A kind of self-priming paddle back pressure valve |
| CN107060689A (en) * | 2017-06-02 | 2017-08-18 | 成都市卓新实业有限公司 | A kind of drilling rod is from grouting method |
-
1990
- 1990-05-09 CN CN 90212636 patent/CN2089067U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010135902A1 (en) * | 2009-05-27 | 2010-12-02 | 泸州川油钻采工具有限公司 | High-low pressure pilot valve |
| CN101812981A (en) * | 2010-04-17 | 2010-08-25 | 西南石油大学 | Mechanical underground all-in-one blowout preventer |
| CN101812981B (en) * | 2010-04-17 | 2012-09-12 | 西南石油大学 | Mechanical underground all-in-one blowout preventer |
| CN103939028A (en) * | 2013-01-22 | 2014-07-23 | 成都大漠石油机械有限公司 | Drill stem connection device capable of preventing jet of mud |
| CN106996279A (en) * | 2017-06-02 | 2017-08-01 | 成都市卓新实业有限公司 | A kind of self-priming paddle back pressure valve |
| CN107060689A (en) * | 2017-06-02 | 2017-08-18 | 成都市卓新实业有限公司 | A kind of drilling rod is from grouting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |