CN202946097U - 一种浮箍浮鞋的防堵塞结构 - Google Patents
一种浮箍浮鞋的防堵塞结构 Download PDFInfo
- Publication number
- CN202946097U CN202946097U CN 201220634214 CN201220634214U CN202946097U CN 202946097 U CN202946097 U CN 202946097U CN 201220634214 CN201220634214 CN 201220634214 CN 201220634214 U CN201220634214 U CN 201220634214U CN 202946097 U CN202946097 U CN 202946097U
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- China
- Prior art keywords
- valve body
- float
- circulation hole
- upper valve
- circulation port
- 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 - Lifetime
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Abstract
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Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201220634214 CN202946097U (zh) | 2012-11-26 | 2012-11-26 | 一种浮箍浮鞋的防堵塞结构 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201220634214 CN202946097U (zh) | 2012-11-26 | 2012-11-26 | 一种浮箍浮鞋的防堵塞结构 |
Publications (1)
Publication Number | Publication Date |
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CN202946097U true CN202946097U (zh) | 2013-05-22 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 201220634214 Expired - Lifetime CN202946097U (zh) | 2012-11-26 | 2012-11-26 | 一种浮箍浮鞋的防堵塞结构 |
Country Status (1)
Country | Link |
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CN (1) | CN202946097U (zh) |
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2012
- 2012-11-26 CN CN 201220634214 patent/CN202946097U/zh not_active Expired - Lifetime
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20201221 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20130522 |