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 series of hydraulic rams to restrain and pull tubing under well pressure, temporarily attached to the wellhead for workover

n: a series of hydraulic rams to restrain and pull tubing under well pressure, temporarily attached to the wellhead for workover.

n: a portable mast that can be erected as a unit, usually by a tackle that hoists the wireline or by a hydraulic ram. The upper section of a telescoping mast is generally nested (telescoped) inside the lower section of the structure and raised to full height either by the wireline or by a hydraulic system. Erroneously but commonly called a telescoping derrick.

a portable mast composed of sections nestled inside one another and raised with a winch or a hydraulic cylinder.