18 July 2017

Catwalk machine

See Horizontal tubular transfer.
18 July 2017

Caving

The collapse of the walls of the wellbore; also called Sloughing.
18 July 2017

Cellar

A pit in the ground, usually lined with concrete or steel pipe, that provides additional height between the rig floor and the wellhead to accommodate the […]
18 July 2017

Cement case

To fill the annulus between the casing and wall of the hole with cement to support the casing and prevent fluid migration between permeable zones.