发明名称 |
Wall contact caliper instruments for use in a drill string |
摘要 |
A drill string caliper includes a mandrel configured to be coupled within a drill string. At least one laterally extensible arm is coupled to an exterior of the mandrel. A biasing device is configured to urge the at least one arm into contact with a wall of a wellbore. A sensor is configured to generate an output signal corresponding to a lateral extent of the at least one arm.
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申请公布号 |
US8024868(B2) |
申请公布日期 |
2011.09.27 |
申请号 |
US20090486187 |
申请日期 |
2009.06.17 |
申请人 |
SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
BRANNIGAN JAMES C.;NOLD, III RAYMOND V.;RASMUS JOHN;GARCIA-OSUNA FERNANDO;ZAZOVSKY ALEXANDER |
分类号 |
E21B47/08;G01B5/12 |
主分类号 |
E21B47/08 |
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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