18 July 2017

Hook

A large, hook-shaped device from which the swivel is suspended. It is designed to carry maximum loads ranging from 100 to 650 tons (90 to 590 […]
18 July 2017

Hook horsepower

The horsepower equivalent for any given hook load and hoisting speed.
18 July 2017

Hook load

The weight on the hook of the drill stem and/or casing expressed in pounds.
18 July 2017

Hopper

A large funnel- or cone-shaped device into which dry components (such as powered clay or cement) can be poured to mix uniformly with water or other […]