Drilling Mast In Oil And Gas Rig
A Mast in drilling (Check also: Rig derrick) is a steel framework with a square or rectangular cross-section comprised of multiple sections assembled together and shaped like a very pointed A. It has the particular feature of being rotary jointed at the base so that it can be assembled or dismantled horizontally and then pulled to an upright position using the drawworks and a special hoisting cable.
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