Page 10 - The Rotary Rig and Its Components

THE HOISTING SYSTEM

Petroleum Extension-The University of Texas at Austin

The Hoisting System

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In this chapter:
• Raising and lowering the drill stem
• Supporting the suspended drill stem
• Moving the drill stem
• Supporting the drill stem and connecting it to the drawworks

uring the drilling of a well, the hoisting system lifts the drill
Dstem in and out of the hole. It also lowers the casing into the For more information on
hole. The hoisting system consists of many pieces: the hoisting system, see
these titles from Unit I of
• The substructure the Rotary Series:
• The derrick or mast • Lesson 5: The Blocks and
Drilling Line
• The drawworks • Lesson 6: The Drawworks
• The crown block and the Compound
• The traveling block and hook
• The drilling line

The substructure supports the derrick, the rotary table, and the full load The Substructure
of the drill stem when the stem is suspended in the hole or standing
in the derrick. It also supports the casing string when the casing is
being run in the hole. In addition, it raises the rig floor high enough
to provide space under the rig for large valves called blowout preventers
(discussed in a later section). The rig floor, which rests on top of the
substructure, holds the drawworks, the driller’s control panel, the
doghouse, and other equipment.

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