- 专利标题： WALL CONTACT CALIPER INSTRUMENTS FOR USE IN A DRILL STRING
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申请号： US13041912申请日： 2011-03-07
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公开(公告)号： US20120055711A1公开(公告)日： 2012-03-08
- 发明人: James C. Brannigan , Raymond V. Nold, III , John C. Rasmus , Fernando Garcia-Osuna , Alexander Zazovsky
- 申请人： James C. Brannigan , Raymond V. Nold, III , John C. Rasmus , Fernando Garcia-Osuna , Alexander Zazovsky
- 主分类号： E21B47/00
- IPC分类号： E21B47/00
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.
公开/授权文献
- US08484858B2 Wall contact caliper instruments for use in a drill string 公开/授权日：2013-07-16
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