STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

530 Drilling and Well Completions
Example
It is required that the drawworks input power be able to lift 600,000 lb at a
rate of 50 ft/min. There are eight working lines between the traveling block
and the crown block. Three input power systems are available: 1,100, 1,400, and
1,800 hp. Which of the three will be the most appropriate? The value of eh is
e,, = 1.00 - 0.02(8) = 0.84
The input horsepower is
600,000( 50)
HP, =
33,000( 0.84)( 0.85)
= 1273.2
The input power system requires 1400 hp.
Drilling and Production Hoisting Equipment [9,10]
Drilling and production hoisting equipment includes:
1. Crown block sheaves and bearings: The stationary pulley system at the top
of the derrick or mast.
2. Traveling blocks: A heavy duty pulley system that hangs in the derrick and
travels up and down with the hoisted tools. It is connected to the crown
block with a wire rope that ultimately runs to the hoisting drum.
3. Block-to-hook adapters: A metal piece that attaches to the bottom of the
traveling block and serves as the mount for the hook.
4. Connectors and link adapters.
5. Drilling hooks: The hook that attaches to the traveling block to connect
the bail of the swivel.
6. Tubing and sucker rod hooks: Hooks connected to the traveling block for
tubing and sucker-rod hoisting operations.
7. Elevator Zinks: The elevator is a hinged clamp attached to the hook and
is used to hoist drill pipe, tubing, and casing. The actual clamp is in a
pair of links that in turn attaches to a bail supported on the hook.
a. Casing, tubing and drill pipe elevators.
9. Sucker rod elevator.
10. Rotary swivel bail adaptors: A bail adaptor that allows the bail of the swivel
to be grasped and hoisted with elevators.
11.
12.
13.
14.
15.
Rotary swivels. The swivel connecting the nonrotating hook and the
rotating kelley while providing a nonrotating connection through which
mud enters the kelley.
Spiders: The component of the elevator that latches onto the hoisted item.
Deadline tiedowns: The deadline is the nonmoving end of the wire rope
from the hoisting down through the crown and traveling blocks. This end
is anchored at ground level with a tiedown.
Kelley spinners, when used as tension members: An adapter between the swivel
and the kelley that spins the kelley for rapid attachment and disattachment
to joints of drill pipe.
Rotary tables, as structural members: The rotary table rotates to turn the
drill string. It is also used to support the drill string during some phases
of operation.