发明授权
- 专利标题： Wall contact caliper instruments for use in a drill string
- 专利标题（中）： 用于钻柱的壁式接触卡钳仪器
-
申请号： US13041912申请日： 2011-03-07
-
公开(公告)号： US08484858B2公开(公告)日： 2013-07-16
- 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
- 申请人地址： US TX Sugar Land
- 专利权人： Schlumberger Technology Corporation
- 当前专利权人： Schlumberger Technology Corporation
- 当前专利权人地址： US TX Sugar Land
- 代理商 Chadwick A. Sullivan
- 主分类号： E21B47/08
- IPC分类号： E21B47/08 ; G01B5/12
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.