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Oil & gas
Terms concerning oil and gas as a fossil fuel and natural resource.
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Oil & gas > Drilling 
metamorphic
Oil & gas; Drilling
One of three main classes of rock (igneous, metamorphic and sedimentary). Metamorphic rocks form from the alteration of preexisting rocks by changes in ambient temperature, ...
hardness ion
Oil & gas; Drilling
One of three divalent cations that can be present in water, including calcium (Ca +2 ), magnesium (Mg +2 ) and ferrous (Fe +2 , a form of iron). Hardness ions develop from ...
sedimentary
Oil & gas; Drilling
One of the three main classes of rock (igneous, metamorphic and sedimentary). Sedimentary rocks are formed at the Earth's surface through deposition of sediments derived from ...
polyalphaolefin
Oil & gas; Drilling
One of the synthetic hydrocarbon liquids manufactured from the monomer ethylene, H 2 C=CH 2 . Polyalphaolefins have a complex branched structure with an olefin bond in the ...
derrickman
Oil & gas; Drilling
One of the rig crew members who gets his name from the fact that he works on a platform attached to the derrick or mast, typically 85 ft (26 m) above the rig floor, during trips. ...
weight indicator
Oil & gas; Drilling
One of the instruments that the driller uses to monitor and improve the operating efficiencies of the drilling operation. The actual measurement of weight is made with a hydraulic ...
rheological property
Oil & gas; Drilling
One of several flow characteristics of a material, such as a drilling fluid, completion fluid, workover fluid or cement. Shear-stress measurements made at a minimum of two shear ...
Sub-categories
- corrosion inhibition (0)
- Downhole (49)
- Drilling (9514)
- Environmental management (93)
- Fuel handling (16)
- Horizontal directional drilling (7)
- Offshore oil exploration (2047)
- Oil (4406)
- Oil & gas instrumentation (856)
- Oilfield (22159)
- Pipeline related (90)