发明名称 |
Open hole non-rotating sleeve and assembly |
摘要 |
A non-rotating downhole sleeve adapted for open hole drilling and/or casing centralization. The sleeve includes a tubular body made of hard plastic with integrally formed helical blades positioned around its outer surface and an inner surface configuration which allows drilling fluid circulation to form a non-rotating fluid bearing between the sleeve and the drill pipe or casing. The helical blades reduce sliding and rotating torque while drilling, with minimal obstruction to drilling fluid passing through the borehole between the blades. |
申请公布号 |
GB2487443(B) |
申请公布日期 |
2014.05.07 |
申请号 |
GB20110010972 |
申请日期 |
2010.10.26 |
申请人 |
WWT NORTH AMERICA HOLDINGS, INC |
发明人 |
GARRETT C CASASSA;SARAH B MITCHELL;NORMAN BRUCE MOORE |
分类号 |
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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