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Draw Works
Main function is to provide means of raising and lowering traveling blocks.
How does it work?
The purpose of the draw works is to provide the hoisting
and breaking power to lift and lower the heavy weights of
drill string and casings.
The draw works itself consists of:
(1) Drum,
(2) Brakes,
(3) Transmission and
(4) Catheads
The drum provides the movement of the drilling line which
in turn lifts and lowers the travelling block and
consequently lifts or lowers the loads on the hook. The
breaking torque, supplied by the drum, has to be strong
enough to be able to stop and hold the heavy loads of the
drilling line when lowered at high speed.
Fixed pulley atop the derrick, has wire rope drilling line running between it
Upright stationary section capable of supporting hundreds of tons of weight ; raises and lowers drill pipe
Multi-sheaved pulley used to raise and lower the drill string and casing into the well bore