发明名称 |
DRILL STRING MEMBER WITH BEARINGS |
摘要 |
A drill string member comprising a body (1), and bearing races (5) around the circumference of the member. In certain embodiment, the presence of spherical bearings (25) on the surface of the member reduces radial torque and vertical drag to enable easier operation of the drill string. Advantages of one embodiment includes a reduction in the wear or breakages of the components used in drilling.
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申请公布号 |
WO0127434(A3) |
申请公布日期 |
2001.10.11 |
申请号 |
WO2000GB03829 |
申请日期 |
2000.10.06 |
申请人 |
ITS SPECIALIST DRILLING TOOLS LIMITED;KIDD, ROBERT, GORDON |
发明人 |
KIDD, ROBERT, GORDON |
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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