18 July 2017

Dope

A generic term applied to all types of thread lubricants.
18 July 2017

Double

A length of drill pipe, casing, or tubing consisting of two joints screwed together. Compare fourble, thribble. See joint.
18 July 2017

Double board

The name used for the working platform of the derrickman, or monkeyboard, when it is located at a height in the derrick or mast equal to […]
18 July 2017

Downhole telemetry

Signals transmitted in real-time (while drilling) from an instrument located near the bottom of the drill string to a receiving monitor on the surface (a surface-readout). […]