CN202176312U - Decompression kelly cock valve - Google Patents
Decompression kelly cock valve Download PDFInfo
- Publication number
- CN202176312U CN202176312U CN201120294898XU CN201120294898U CN202176312U CN 202176312 U CN202176312 U CN 202176312U CN 201120294898X U CN201120294898X U CN 201120294898XU CN 201120294898 U CN201120294898 U CN 201120294898U CN 202176312 U CN202176312 U CN 202176312U
- Authority
- CN
- China
- Prior art keywords
- valve
- decompression
- valve base
- kelly cock
- ball valve
- 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
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Abstract
A decompression kelly cock valve relates to petroleum machinery, in particular to a decompression kelly cock valve capable of decompressing pressure in a drilling tool through a decompressing device on a valve wall. The decompression kelly cock valve comprises a body (1), an upper valve base (2), a lower valve base (3), a ball valve (4) and an opening portion (5) for opening the ball valve (4). The upper end face of the upper valve base (2) is fixedly connected with the inside of the body (1) through a clamping device, a contact face where the upper valve base (2) is matched with the ball valve (4) and a contact face where the lower valve base (3) is matched with the ball valve (4) are closely connected through a spring butting against a clamping table on the inner wall of the body, a decompression hole (6) arranged on a wall of the body (1) below the ball valve (4) is communicated with an inner cavity of the body (1), and a screwed plug (7) is threaded inside the decompression hole (6). The decompression kelly cock valve can decompress the pressure in the drilling tool through the decompression hole on a valve wall and has the advantages of being simple in structure, convenient to operate and safe and reliable.
Description
Technical field
The utility model relates to petroleum machinery, but is specifically related to a kind of pressure release kelly cock that can the drilling tool internal pressure be discharged through the pressure relief device on the valve wall.
Background technology
Kelly cock can be divided into upper kelly cock valve and lower kelly cock, and drilling fluid can not have pressure drop ground and freely flows through kelly cock.Can be used as drilling pipe safety valve, perhaps be contained in the above control of kelly bar blowout prevention, perhaps be contained in the kelly bar bottom, prevent that when kelly bar unloads drilling fluid runs off.
At present the kelly cock of each manufacturer production adopts ball-valve structure more, with the fixing automatic pressure balanced structure of upper valve base and ball valve, makes valve body under rated operating pressure, by the high oil gas well pressure of valve upper pressure autobalance, and makes threshold switch freely.But when down-hole pressure surpassed 2MPa, plug valve cut out the back and is difficult to open, and when pressure meets or exceeds 20MPa when above, plug valve can not be opened at all.That is to say if well kick or blowout take place; And when down-hole pressure is excessive,, can not discharge the pressure in the drilling tool though plug valve has been controlled well kick or blowout; For follow-up work is offered help; Can only pass through the pressure release by force of other modes, this is quite dangerous, is difficult to guarantee oil field workman's life security.
Summary of the invention
The utility model technical problem to be solved is: but a kind of pressure release kelly cock is provided.
The technical solution of the utility model is: it comprises body, upper valve base, lower valve base, ball valve and the open portion of opening ball valve; The upper surface of upper valve base is through being fastened in the body with the inlay card device; Upper valve base and lower valve base closely connect through the spring that is against on the inner body wall Ka Tai with the contact surface that ball valve matches mutually; The wall of said body in the ball valve below is provided with relief hole and is communicated with chamber body, is bolted with plug in the relief hole.
The technique effect of the utility model is: it can discharge the drilling tool internal pressure through the relief hole on the valve wall, have simple in structure, be convenient to operate and safe and reliable characteristics.
Description of drawings
Fig. 1 partly cuts open structure chart for the utility model.
The specific embodiment
As shown in Figure 1; It comprises body 1, upper valve base 2, lower valve base 3, ball valve 4 and the open portion 5 of opening ball valve 4; The upper surface of upper valve base 2 is through being fastened in the body 1 with the inlay card device; Upper valve base 2 and lower valve base 3 closely connect through the spring that is against on the inner body wall Ka Tai with the contact surface that ball valve 4 matches mutually, and the wall of said body 1 in ball valve 4 belows is provided with relief hole 6 and is communicated with body 1 inner chamber, is bolted with plug 7 in the relief hole 6.
Said relief hole 6 is the hole of internal orifice diameter less than the collar extension diameter.
Said relief hole 6 perforates are in the lower edge of lower valve base 3.
Plug valve after the improvement; But have the pressure release function, close the situation that the back is difficult to unlatching because well is pressed, can open pressure relief device and carry out pressure release if run into plug valve; After treating that pressure reduces; Rotate 90o on request with professional spanner, can realize opening, for processing blowout follow-up work provides simply, timely and measures necessary.
Claims (3)
1. but pressure release kelly cock; Comprise body (1), upper valve base (2), lower valve base (3), ball valve (4) and the open portion (5) of opening ball valve (4); The upper surface of upper valve base (2) is through being fastened in the body (1) with the inlay card device; Upper valve base (2) and lower valve base (3) closely connect through the spring that is against on the inner body wall Ka Tai with the contact surface that ball valve (4) matches mutually; It is characterized in that the wall of said body (1) in ball valve (4) below is provided with relief hole (6) and is communicated with body (1) inner chamber, is bolted with plug (7) in the relief hole (6).
2. but pressure release kelly cock as claimed in claim 1 is characterized in that, said relief hole (6) is the hole of internal orifice diameter less than the collar extension diameter.
3. but according to claim 1 or claim 2 pressure release kelly cock is characterized in that said relief hole (6) perforate is in the lower edge of lower valve base (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120294898XU CN202176312U (en) | 2011-08-15 | 2011-08-15 | Decompression kelly cock valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120294898XU CN202176312U (en) | 2011-08-15 | 2011-08-15 | Decompression kelly cock valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176312U true CN202176312U (en) | 2012-03-28 |
Family
ID=45866197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120294898XU Expired - Fee Related CN202176312U (en) | 2011-08-15 | 2011-08-15 | Decompression kelly cock valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176312U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179734A (en) * | 2015-10-21 | 2015-12-23 | 大连瑞亨机械制造有限公司 | High-strength and high-pressure kelly cock valve |
| CN105840138A (en) * | 2016-05-31 | 2016-08-10 | 成都国光电子仪表有限责任公司 | Natural gas blowout control diverter valve |
| CN105840140A (en) * | 2016-05-31 | 2016-08-10 | 成都国光电子仪表有限责任公司 | Anti-corrosion diversion structure |
| CN105840139A (en) * | 2016-05-31 | 2016-08-10 | 成都国光电子仪表有限责任公司 | Anticorrosive fluid director for natural gas |
| CN105863558A (en) * | 2016-05-31 | 2016-08-17 | 成都国光电子仪表有限责任公司 | Anti-corrosion flow guide device for well hole |
| CN106014333A (en) * | 2016-05-31 | 2016-10-12 | 成都国光电子仪表有限责任公司 | Natural gas blowout-control and flow-guiding device |
-
2011
- 2011-08-15 CN CN201120294898XU patent/CN202176312U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179734A (en) * | 2015-10-21 | 2015-12-23 | 大连瑞亨机械制造有限公司 | High-strength and high-pressure kelly cock valve |
| CN105840138A (en) * | 2016-05-31 | 2016-08-10 | 成都国光电子仪表有限责任公司 | Natural gas blowout control diverter valve |
| CN105840140A (en) * | 2016-05-31 | 2016-08-10 | 成都国光电子仪表有限责任公司 | Anti-corrosion diversion structure |
| CN105840139A (en) * | 2016-05-31 | 2016-08-10 | 成都国光电子仪表有限责任公司 | Anticorrosive fluid director for natural gas |
| CN105863558A (en) * | 2016-05-31 | 2016-08-17 | 成都国光电子仪表有限责任公司 | Anti-corrosion flow guide device for well hole |
| CN106014333A (en) * | 2016-05-31 | 2016-10-12 | 成都国光电子仪表有限责任公司 | Natural gas blowout-control and flow-guiding device |
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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: 20120328 Termination date: 20160815 |