Drilling

Drilling

Of or relating to the penetration of the Earth's surface in order to extract petroleum oil.

Industry: Oil & gas

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Drilling

Natural gas

Oil & gas; Drilling

A highly compressible, highly expansible mixture of hydrocarbons with a low specific gravity and occurring naturally in a gaseous form.

A special mud tank that holds mud that is not being actively circulated. A reserve tank usually contains a different type of mud from that which the pump is currently circulating. For example, it may ...

Tubing head

Oil & gas; Drilling

A flanged fitting that supports the tubing string, seals off pressure between the casing and the outside of the tubing, and provides a connexion that supports the Christmas tree.

Gas-lift mandrel

Oil & gas; Drilling

A device installed in the tubing string of a gas-lift well onto which or into which a gas-lift valve is fitted. There are two common types of mandrel. In the conventional gas-lift mandrel, the ...

Multiple completion

Oil & gas; Drilling

An arrangement for producing a well in which one wellbore penetrates two or more petroleum-bearing formations. In one type, multiple tubing strings are suspended side by side in the production casing ...