An automated system for measuring, sampling, and transferring oil from a lease gathering system into a pipeline. See Lease Automatic Custody Transfer.

The pipe tongs suspended in the derrick or mast and operated by a wireline connected to the breakout cathead. In coming out of the hole, they […]

The leak-off test (LOT) is routinely used to verify that the cement and formation being tested can withstand predicted wellbore pressures and that it’s safe to […]

1) a legal document executed between a landowner, as lessor, and a company or individual, as lessee, that grants the right to exploit the premises for […]

The measurement, sampling, and transfer of oil from the producer’s tanks to the connected pipeline on an automatic basis without a representative of either the producer […]

Any string of casing whose top is situated at any point below the surface.

The place where a well is drilled.

A systematic recording of data, such as a driller’s log, mud log, electrical well log, or radioactivity log. Many different logs are run in wells to […]

API RP-65/2 defines loss of well control (LWC) as “…flow of subterranean formation fluids or well fluids into the environment or into a separate underground formation.” […]

The flex joint, or ball joint, allows the riser, which moves with the floating rig, to be connected to the BOP stack, which is locked to […]