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This Dictionary of Oil Sector related terms is sponsored by: 
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Showing definitions 21 to 30 of 85 for the letter 'a'
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- Agitators
- Mixing devices used to bring about intimate contact between liquids or solutions of dissolved solids, or to keep solids suspended in liquids.
- Air
- The gaseous environment surrounding the Earth. The approximate composition of dry air by volume at sea level is nitrogen, 78 per cent; oxygen, 21 per cent; argon, .9 per cent; carbon dioxide, .03 per cent; and other rare gases, .0024 per cent.
- Air actuated
- Powered by compressed air, as in the clutch and brake system in drilling equipment.
- Air chamber
- A small tank or "bottle" connected to a reciprocating pump's discharge chamber or line to absorb and dampen the surges in pressure from the rhythmic pumping action. Air chambers are charged with sufficient air pressure to provide an air-cushion that minimises the pounding and vi- bration associated with the pumping of fluids with plunger pumps
- Air cutting
- The inadvertent mechanical incorporation and dispersion of air into a fluid system. Compare aeration.
- Air drilling
- A method of rotary drilling that uses compressed air as the circulation medium. The conventional method of removing cuttings from the well bore is to use a flow of water or drilling mud. Compressed air removes the cuttings with equal or greater efficiency. The rate of penetration is usually increased considerably when air drilling is used. However, a principal problem in air drilling is the penetration of formations containing water, since the entry of water into the system reduces the ability of the air to remove the cuttings.
- Aliphatic
- The term used to describe open-chain organic compounds and those cyclic compounds (such as cyclohexane) which have similar chemical properties to open-chain compounds.
- Aliphatic solvent
- An organic solvent based on aliphatic as opposed to aromatic compounds.
- Alkali
- A chemical compound capable of neutralising an acid, e.g., caustic soda.
- Alkanes
- The simplest homologous series of saturated aliphatic hydrocarbons, consisting of methane (CH4), ethane (C2H6), propane (C3H8) etc.; also known as the paraffins.
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