دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a device run on wireline into the wellbore and inside the fishing string and fish to locate the area where a fish is stuck. When the drill string is pulled and turned, the electromagnetic fields of free pipe and stuck pipe differ. The freepoint indicator is able to distinguish these differences, which are registered on a metering device at the surface.