发明授权
US4494072A Well logging apparatus with replaceable sensor carrying insulating sleeve disposed in rotation restrained position around a drill string 失效
测井装置具有可替换的传感器,承载绝缘套管,围绕钻柱设置在旋转限制位置

Well logging apparatus with replaceable sensor carrying insulating
sleeve disposed in rotation restrained position around a drill string
摘要:
A replaceable insulating sleeve is disposed around the lower end of a drill string used in drilling a well. The sleeve is restrained from rotating relative to the drill string, but can be released and quickly slipped off the drill string in the field to permit rapid replacement if damaged, or if alternate equipment is required. The sleeve carries sensing means for measuring a characteristic of formations penetrated by the well.
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