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Components of the Hoisting System

What is the Hoisting System?

Hoisting system is one of the main parts actually doing the drilling job. It provide a means of lowering and raising drilling strings, casing strings and other subsuface equipment into and out of the hole.

The hoisting equipment itself consists of:

(1) Draw works,

(2) Fast line,

(3) Crown block,

(4) Travelling block,

(5) Dead line,

(6) Deal line anchor,

(7) Storage reel,

(8) Hook and

(9) Derrick,

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.

Crown Block

Fixed pulley atop the derrick, has wire rope drilling line running between it

Derrick/Mast

Components at a glance

Upright stationary section capable of supporting hundreds of tons of weight ; raises and lowers drill pipe

Traveling Block

Multi-sheaved pulley used to raise and lower the drill string and casing into the well bore

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