Oil & gas

Oil & gas

Terms concerning oil and gas as a fossil fuel and natural resource.

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Oil & gas > Drilling

sub-sea completion

Oil & gas; Drilling

The process of installing a sub-sea, or ocean floor, wellhead.

step out well

Oil & gas; Drilling

A well drilled beyond the proven limits of a field to investigate a possible extension to that field, sometimes called an outstep well.

back-up

Oil & gas; Drilling

A term used to describe the process whereby one section of drill pipe is held stationary using tongs while another section is screwed out of or into it.

leakage test

Oil & gas; Drilling

The process of applying pressure to the formation below the casing seat to test the quality of cementing and to determine the fracture pressure in the permeable zone immediately ...

drill stem test (OST)

Oil & gas; Drilling

A test whereby the nature and quantity of the formation fluids in a possible oil-or gas-bearing stratum are determined by allowing them to flow to the surface through the drill ...

cavitation

Oil & gas; Drilling

The formation of a space in a flowing liquid by a fixed object in its path or a stationary liquid by a moving object, e g , behind the blades of an agitator, or in a pump which ...