دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a large, hook-shaped device from which the swivel is suspended. It is designed to carry maximum loads ranging from 100 to 650 tons (90 to 590 tonnes) and turns on bearings HOOK in its supporting housing. A strong spring within the assembly cushions the weight of a stand (90 feet, about 27 metres) of driI1 pipe, thus permit- ting the pipe to be made up and broken out with less damage to the tool joint threads. Smaller hooks without the spring are used for handling tubing and sucker rods. See also .stand, swivel.

n: tha large component attached to the travelling block from which the drill stem is suspended via the swivel