发明名称 |
IMPROVEMENTS IN AND RELATING TO DOWNHOLE TOOLS |
摘要 |
There is disclosed an improved tool, e.g. adapted to comprise at least part of a well completion assembly or well drilling assembly. The invention provides an improved downhole tool (or device) having a friction factor of the order of ten times less than those known from the prior art, e.g. of the order of 0.100 or less. Accordingly the invention provides a downhole tool (10; 10a; 10b; 10c; 10d), at least part of the downhole tool or device being made from Tungsten Disulphide (Tungsten Disulfide). In a disclosed embodiment the at least part comprises at least one surface of the downhole tool, the at least one surface comprising a bearing surface, e.g. a journal bearing surface and/or a thrust bearing surface. |
申请公布号 |
EP1982039(B1) |
申请公布日期 |
2013.12.18 |
申请号 |
EP20070705146 |
申请日期 |
2007.02.08 |
申请人 |
THORNTON, THOMAS JOHN OLIVER |
发明人 |
THORNTON, THOMAS JOHN OLIVER |
分类号 |
E21B17/02;E21B17/08;E21B17/10 |
主分类号 |
E21B17/02 |
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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