دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a portable servicing or workover outfit, usually mounted on wheels and self-propelled. A well-servicing unit consists of a hoist and engine mounted on a wheeled chassis with a self-erecting mast. A workover rig is basically the same, with the addition of a substructure with rotary, pump, pits, and auxiliaries to permit handling and working a drill string.

n: the portable , truck load, self-propelled working rig.

a mobile servicing or workover unit.