دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a cylinder and piston device that uses hydraulic pressure for pushing, lifting, or pulling. It is commonly used to raise portable masts from a horizontal to a vertical position, for leveling a production rig at an uneven location, or for closing a blow- out preventer against pressure.

n: an assembly of hydro cylinder or piston which depends on hydraulic pressure to pushing, pulling and rising.

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.

n: a well-servicing outfit used in pulling rods and tubing from the well. See production rig.

n: see production rig.

n: The complete set for workover in the bottom hole.

n: a portable rig used for working over a well. See production rig.

a servicing rig designed to run and pull tubing. It usually has some capacity to mill or drill.