18 July 2017

Conductor casing or pipe

1) a short string of large-diam casing used to keep the wellbore open and to provide a means of conveying the up-flowing drilling fluid from the […]
20 October 2021

Constant Bottom Hole Pressure (CBHP)

Methodology within managed pressure drilling, Proactive Category; whereby bottomhole pressure is kept constant during connections to compensate the loss of annulus friction pressure (AFP) when mud […]
18 July 2017

Contract depth

The depth of the wellbore at which a drilling contract is fulfilled.
18 July 2017

Core

A cylindrical sample taken from a formation for geological analysis. Usually a conventional core barrel is substituted for the bit and procures a sample as it […]