Casing is the structural retainer for the walls of oil and gas wells. The process is used to prevent contamination of both the surrounding water table and the well itself. Casing lasts the life of a well and is not usually removed when a well is closed.

Casing is the term given to pipe that is cemented into the well to seal off formation fluids or to keep the hole from caving in. Casing pipe is usually manufactured from plain carbon steel that is heat-treated to varying strengths, but may be specially fabricated of stainless steel, aluminum, titanium, fiberglass and other materials.

An assembled length of steel pipe configured to suit a specific wellbore. The sections of pipe are connected and lowered into a wellbore, then cemented in place.

The installation of permanent wellhead equipment for the production of oil and gas.

An engine used to increase the pressure of natural gas so that it will flow more easily through a pipeline. A compressor normally uses positive displacement to compress the gas to higher pressures so that the gas can flow into pipelines and other facilities.

Hydrocarbons which are in the gaseous state under reservoir conditions and which become liquid when temperature or pressure is reduced.Its presence as a liquid phase depends on temperature and pressure conditions in the reservoir allowing condensation of liquid from vapour. Gas produced in association with condensate is called wet gas.

Coring describes the process of taking rock samples from a well by means of a special tool called a core barrel. The core barrel itself may be thought of as a special storage chamber for holding the rock core. The core catcher serves to grip the bottom of the core and, as tension is applied to the drillstring, the rock under the core breaks away from the undrilled formation below it.

This is a general term for unrefined petroleum or liquid petroleum

A standard unit used to measure the quantity of gas (at atmospheric pressure); 1 cubic foot = 0.0283 cubic meters.

Rock chips cut from the formation by the drill bit, and brought to the surface with the mud. Used by geologists to obtain formation data.