دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a hoist operated by compressed air;a pneumatic hoist. Air hoists are often mounted on the rig floor and are used to lift joints of pipe and other heavy objects.

n: I. the ramp at the side of the drilling rig where pipe is laid to be lifted to the derrick floor by the catline or by an air hoist. See carline. 2. any elevated walkway.

n pi: drawworks, drilling line, and travelling and crown blocks. Auxiliary hoisting components include catheads, catshaft, and air hoist.

n: the relatively small pneumatically operated engine on an air hoist, or tugger.

n: an arrangement of special hooks that fit into receptacles in a master bushing or an insert bowl and chains or wire rope that are connected to a rigs air hoist, all of which enables crew members to insert or remove the master bushing and insert bowls as required.

n: any device equipped with rollers and used to move drill pipe or collars. It is usually placed under one end of the pipe while the pipe is being lifted from the other end by an air hoist line.