دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Special tool used in directional drilling which can build angle,hold angle drop angle, survey the deviation and direction.

n: the trade name for a directional drilling tool that deflects the drilling assembly off vertical without having to be pulled from the hole. The device that causes the tool to be deflected can be caught and retrieved with a wireline.