CN202520243U - 一种防卡瓦咬伤钻杆 - Google Patents
一种防卡瓦咬伤钻杆 Download PDFInfo
- Publication number
- CN202520243U CN202520243U CN 201220125451 CN201220125451U CN202520243U CN 202520243 U CN202520243 U CN 202520243U CN 201220125451 CN201220125451 CN 201220125451 CN 201220125451 U CN201220125451 U CN 201220125451U CN 202520243 U CN202520243 U CN 202520243U
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- China
- Prior art keywords
- drill pipe
- thick
- bite
- pipe body
- walled
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- 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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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 201220125451 CN202520243U (zh) | 2012-03-29 | 2012-03-29 | 一种防卡瓦咬伤钻杆 |
Applications Claiming Priority (1)
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CN 201220125451 CN202520243U (zh) | 2012-03-29 | 2012-03-29 | 一种防卡瓦咬伤钻杆 |
Publications (1)
Publication Number | Publication Date |
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CN202520243U true CN202520243U (zh) | 2012-11-07 |
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CN 201220125451 Expired - Lifetime CN202520243U (zh) | 2012-03-29 | 2012-03-29 | 一种防卡瓦咬伤钻杆 |
Country Status (1)
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CN (1) | CN202520243U (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104100212A (zh) * | 2013-04-15 | 2014-10-15 | 上海海隆石油钻具有限公司 | 抗挤毁咬伤保护钻杆 |
-
2012
- 2012-03-29 CN CN 201220125451 patent/CN202520243U/zh not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104100212A (zh) * | 2013-04-15 | 2014-10-15 | 上海海隆石油钻具有限公司 | 抗挤毁咬伤保护钻杆 |
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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 |
Effective date of registration: 20210222 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee after: BOHAI NKK DRILLING PIPE Co.,Ltd. Address before: 300457 building 3, Tianjin Binhai Service Outsourcing Industrial Park, 19 West Road, Tanggu, Tianjin. Patentee before: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee before: BOHAI NKK DRILLING PIPE Co.,Ltd. |
|
TR01 | Transfer of patent right | ||
CX01 | Expiry of patent term |
Granted publication date: 20121107 |
|
CX01 | Expiry of patent term |