Derrick
The structure used to support the crown blocks and drill string of a drilling rig, usually pyramidal in shape offering a good strength-to-weight ratio. Also, any of several types of stationary cranes used primarily for lifting loads.
The structure used to support the crown blocks and drill string of a drilling rig, usually pyramidal in shape offering a good strength-to-weight ratio. Also, any of several types of stationary cranes used primarily for lifting loads.
