دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an option right reserved by the granting company of a farmout to convert an overriding royalty to a working interest once the conditions for such back-in have been met. Compare election at casing point.

a type of interest in a well or least that becomes active at a specified time or a specified event.

n: a large, specially designed, self-propelled workover rig that is driven directly to the well site. Power from a carrier rigs hoist engine or engines also propels the rig on the road. While a carrier rig is primarily intended to perform workovers, it can also be used to drill relatively shallow wells. A carrier rig may be a back-in type or a drive-in type. Compare back-in unit, drive-in unit.

n: A kind of portable service machine. The derrick mask, drawworks, motor and other necessary additional service rig.

a self propelled drilling or workover rig.