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Oil & gas
Terms concerning oil and gas as a fossil fuel and natural resource.
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Oil & gas > Oilfield 
casing gun
Oil & gas; Oilfield
A perforating gun assembly designed to be used in a wellbore before the production tubulars or completion equipment have been installed, thus allowing access for a larger diameter ...
drop-off gun
Oil & gas; Oilfield
A perforating gun assembly designed to be detached from the tubing or running string after firing. The detached assembly can then drop, or be pushed, to the bottom of the well ...
deep-penetrating charge
Oil & gas; Oilfield
A perforating charge designed to provide a long perforation tunnel, such as may be required to bypass any near-wellbore damage. Specially designed deep-penetrating charges achieve ...
overriding royalty
Oil & gas; Oilfield
A percentage share of production, or the value derived from production, which is free of all costs of drilling and producing, and is created by the lessee or working interest ...
nonparticipating royalty
Oil & gas; Oilfield
A percentage share of production, or the value derived from production, which is free of the costs of drilling and producing, created by the lessor or royalty owner and borne by ...
lessor royalty
Oil & gas; Oilfield
A percentage share of production, or the value derived from production, which is granted to the lessor in the oil and gas lease, and which is free of the costs of drilling and ...
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)