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.
申请公布号
US8484858(B2)
申请公布日期
2013.07.16
申请号
US201113041912
申请日期
2011.03.07
申请人
BRANNIGAN JAMES C.;NOLD, III RAYMOND V.;RASMUS JOHN C.;GARCIA-OSUNA FERNANDO;ZAZOVSKY ALEXANDER;SCHLUMBERGER TECHNOLOGY CORPORATION
发明人
BRANNIGAN JAMES C.;NOLD, III RAYMOND V.;RASMUS JOHN C.;GARCIA-OSUNA FERNANDO;ZAZOVSKY ALEXANDER