CN201339445Y - 煤层瓦斯抽采孔用三角型钻杆 - Google Patents
煤层瓦斯抽采孔用三角型钻杆 Download PDFInfo
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- CN201339445Y CN201339445Y CNU2008201397723U CN200820139772U CN201339445Y CN 201339445 Y CN201339445 Y CN 201339445Y CN U2008201397723 U CNU2008201397723 U CN U2008201397723U CN 200820139772 U CN200820139772 U CN 200820139772U CN 201339445 Y CN201339445 Y CN 201339445Y
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- drill pipe
- drilling rod
- bed gas
- triangular
- coal
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CNU2008201397723U CN201339445Y (zh) | 2008-10-27 | 2008-10-27 | 煤层瓦斯抽采孔用三角型钻杆 |
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CNU2008201397723U CN201339445Y (zh) | 2008-10-27 | 2008-10-27 | 煤层瓦斯抽采孔用三角型钻杆 |
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CN201339445Y true CN201339445Y (zh) | 2009-11-04 |
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CNU2008201397723U Expired - Lifetime CN201339445Y (zh) | 2008-10-27 | 2008-10-27 | 煤层瓦斯抽采孔用三角型钻杆 |
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CN (1) | CN201339445Y (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102635320A (zh) * | 2012-05-21 | 2012-08-15 | 重庆松藻煤电有限责任公司 | 一种圆弧形凸棱钻杆快速拆卸装置及方法 |
WO2021238603A1 (zh) * | 2020-05-28 | 2021-12-02 | 上海久卓机电设备有限公司 | 微扰动切削搅拌注浆系统 |
-
2008
- 2008-10-27 CN CNU2008201397723U patent/CN201339445Y/zh not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102635320A (zh) * | 2012-05-21 | 2012-08-15 | 重庆松藻煤电有限责任公司 | 一种圆弧形凸棱钻杆快速拆卸装置及方法 |
WO2021238603A1 (zh) * | 2020-05-28 | 2021-12-02 | 上海久卓机电设备有限公司 | 微扰动切削搅拌注浆系统 |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20091127 Address after: Room 906, Zhongguancun energy and safety science and Technology Park, 16 Qinghua Dong Road, Beijing, Haidian District 100083, China Co-patentee after: Huainan Mining (Group) Co., Ltd. Patentee after: China mine Dragon Energy Science and Technology (Beijing) Co., Ltd. Address before: Room 906, Zhongguancun energy and safety science and Technology Park, 16 Qinghua Dong Road, Beijing, Haidian District 100083, China Patentee before: Zhongkuang Longke Energy Technology (Beijing) Co., Ltd. |
|
CX01 | Expiry of patent term |
Granted publication date: 20091104 |
|
CX01 | Expiry of patent term |