An automated system of arms on a column that can be a fixed rotating (radial pattern) machine or a traveling and rotating machine. Usually consists of […]

A casing string with joints of various collapse resistance, internal yield strength and tensile strength, designed for various depths in a specific well to best withstand […]

See Company representative.

An employee of an operating company whose job is to represent the company’s interest at the drilling location.

1) a mechanism used to transmit power from the engines to the pump, the drawworks, and other machinery on a drilling rig. It is composed of […]

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 […]

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 […]

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

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 […]

Laboratory analysis of a core sample to determine porosity, permeability, lithology, fluid content, angle of dip, geological age, and probable productivity of the formation.