发明名称 |
Non-rotating casing centralizer |
摘要 |
A non-rotating downhole sleeve adapted for casing centralization in a borehole. The sleeve includes a tubular body made of hard plastic with integrally formed helical blades positioned around its outer surface and an inner surface which allows drilling fluid to circulate to form a non-rotating fluid bearing between the sleeve and the casing. The tubular sleeve comprises a continuous non-hinged wall structure for surrounding the casing. The non-rotating centralizer sleeve reduces sliding and rotating torque at the surface while drilling the casing, for example, with minimal obstruction to drilling fluid passing between the casing and the surrounding borehole. |
申请公布号 |
GB2507460(A) |
申请公布日期 |
2014.05.07 |
申请号 |
GB20110010978 |
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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