18 July 2017
To obtain cuttings for geological information as formations are penetrated by the bit. The samples are obtained from drilling fluid as it emerges from the wellbore […]
18 July 2017
A spool-shaped attachment on the end of the catshaft around which rope for hoisting and pulling is wound. Also called Automatic cathead. See Breakout cathead, Makeup […]
18 July 2017
A hoisting or pulling line powered by the cathead and used to lift heavy equipment on the rig. See Cathead.
18 July 2017
Elongated platform adjacent to the rig floor where pipe is laid out and lifted into the derrick. The catwalk is connected to the rig floor by […]
18 July 2017
See Horizontal tubular transfer.
18 July 2017
The collapse of the walls of the wellbore; also called Sloughing.
18 July 2017
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
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.
18 July 2017
When casing is being cemented in a borehole, the cement slurry can fail to rise uniformly between the casing and the borehole wall, leaving spaces devoid […]
18 July 2017
The application of a liquid slurry of cement and water to various points inside or outside the casing. See Primary cementing, Secondary cementing, Squeeze cementing.
18 July 2017
Spring steel guides which are attached to casing and which serve to keep it centered in the hole.
18 July 2017
A mechanical drive using a driving chain and chain gears to transmit power. Power transmissions use a roller chain, in which each link is made of […]
