Oil & gas

Oil & gas

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

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Oil & gas > Drilling

critical rate

Oil & gas; Drilling

The minimum rate required to achieve turbulent flow.

lignite

Oil & gas; Drilling

The mineral leonardite, similar to brown coal. Lignite is found in surface deposits worldwide. Lignite is mined and put into piles where it can oxidize in the air before it is ...

galena

Oil & gas; Drilling

The mineral form of lead sulfide, PbS, and the most common ore for lead smelting. In drilling muds, powdered galena has been used, although rarely, to construct extremely high ...

hematite

Oil & gas; Drilling

The mineral form of ferric oxide (Fe 2 O 3 ). The hematite ore used as a weighting material in drilling muds has a mica-like crystal structure that grinds to particle size ...

motorman

Oil & gas; Drilling

The member of the rig crew responsible for maintenance of the engines. While all members of the rig crew help with major repairs, the motorman does routine preventive maintenance ...

brake

Oil & gas; Drilling

The mechanism on the drawworks that permits the driller to control the speed and motion of the drilling line and the drillstring, or the brake handle that the driller operates to ...