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 projecting member run out at an angle from the sides of a portable mast or a land crane to the ground to provide stability and to minimise the possibility of having the mast or the crane overturn.

n: the bar of mast both sides extends some degree to the side.

n: a portable mast constructed of tubular members. A pole mast may be a single pole, usually of two different sizes of pipe telescoped together to be moved or extended and locked to obtain maximum height above a well. Double-pole masts give added strength and stability. See mast.

n: the portable derrick that made of tubes.

n: a mast mounted on a truck and capable of being erected as a single unit. See telescoping mast.

n: the mast that transported by truck. See telescoping derrick.

n: a portable mast constructed of angular as opposed to tubular steel members. See jackknife mast.

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.