发明名称 |
DOWNHOLE EXPANDABLE ROLLER BEARING APPARATUS |
摘要 |
A downhole expandable roller bearing apparatus (2) is described. The apparatus (2) comprises a plurality of roller assemblies comprising at least one roller (12) rotatably mounted between pistons (14). A retaining member such as a spline bar (26) is removably mounted in a keyway formed in the body (4). Each piston (14) comprises an aperture (30) through which the spline bar (26) projects in both the inwardly retracted and outwardly deployed positions of the pistons (14). |
申请公布号 |
WO2011021047(A2) |
申请公布日期 |
2011.02.24 |
申请号 |
WO2010GB51379 |
申请日期 |
2010.08.20 |
申请人 |
LEE, PAUL, BERNARD;BYWORTH, IAN, JAMES |
发明人 |
LEE, PAUL, BERNARD |
分类号 |
E21B10/34 |
主分类号 |
E21B10/34 |
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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