发明名称 |
FRICTION-REDUCING DRILL PIPE COMPONENT |
摘要 |
A friction-reducing drill pipe component (10) for forming part of a drill string comprises a mandrel (15) comprising a tubular body (16) having first and second ends for connection to adjacent components of a drill string, and a stop (18) extending radially from the body. A sleeve (20) is rotatably mounted on the body (16) and a bearing arrangement is provided between the sleeve and the body. At least one bearing set (26) is provided between the sleeve (20) and the stop (18) to provide axial as well as radial support for the sleeve.
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申请公布号 |
WO0001239(A3) |
申请公布日期 |
2002.09.19 |
申请号 |
WO1999GB02098 |
申请日期 |
1999.07.01 |
申请人 |
DRILLTECH SERVICES (ASIA) PTE LTD.;APPLETON, ROBERT, PATRICK |
发明人 |
APPLETON, ROBERT, PATRICK |
分类号 |
E21B17/10;(IPC1-7):E21B17/10 |
主分类号 |
E21B17/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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