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 […]
9 November 2021
Measures integrity of cement bond between tubing/casing and well bore. The cement bond evaluation for large-diameter casing can be technically challenging because it can reach the […]
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 […]
18 July 2017
Rams are the flexible elements which accomplish the sealing effect of the blowout preventer. It is necessary to change the rams when drill pipe of a […]
18 July 2017
A valve that permits flow in one direction only. If the gas or liquid starts to reverse, the valve automatically closes, preventing reverse movement. Commonly referred […]
18 July 2017
A device with an orifice installed in a line to restrict the flow of fluids. Chokes are also used to control the rate of flow of […]
20 October 2021
Flexible pipe jumper located between choke manifold and blow-out preventer.
18 July 2017
A pipe attached to the blowout preventer stack out of which kick fluids and mud can be pumped to the choke manifold when a blowout preventer […]
