18 July 2017

Deadline tie-down anchor

A device to which the deadline is attached, securely fastened to the mast or derrick substructure. Also called a dead-line anchor.
18 July 2017

Deadman

A mechanical slope indicator that consists of a ball rolling on a calibrated surface within a liquid filled enclosure that gives a visual indication of the […]
18 July 2017

Degasser

The device used to remove unwanted gas from a liquid, especially from drilling fluid.