发明名称 |
DRIVE SYSTEM |
摘要 |
The invention relates to a drive system, in particular a downhole drilling assembly (10). A bearing mechanism (14, 24) of the assembly (10) is isolated from a gear mechanism (20) of the assembly (10), to prevent failure of the bearing mechanism (14, 24) due to vibration and heat generated by the gear mechanism (20) in use. A lower bearing unit (24) of the bearing mechanism (24) is coupled to the gear mechanism (29) by a shock eliminating coupling assembly (22). The gear mechanism (20). Also, the gear mechanism (20) is coupled through a shock eliminating coupling assembly (18) to a turbine (16). Sealing assemblies (60, 116) are provided for the gear mechanism (20) and the upper bearing unit (14) to prevent drilling fluid ingress and consequent damage. The assembly (10) may also carry a torsionally flexible drive shaft (46). |
申请公布号 |
WO0198619(A2) |
申请公布日期 |
2001.12.27 |
申请号 |
WO2001GB02679 |
申请日期 |
2001.06.15 |
申请人 |
NEYRFOR-WEIR LIMITED;DOWNIE, ANDREW, MCPHERSON;PEZZANI, GUIDO, ERNESTO |
发明人 |
DOWNIE, ANDREW, MCPHERSON;PEZZANI, GUIDO, ERNESTO |
分类号 |
E21B4/00;E21B4/02;E21B17/07 |
主分类号 |
E21B4/00 |
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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