a measure of the acidity or alkalinity of a solution expressed as pH. See pH.

See platform rig.

a well into which gas in injected for the purpose of maintaining or supplementing pressure in an oil reservoir. More commonly called a gas injection well.

a choke, used to regulate flow of fluid from a well. Different sizes of beans are used for different producing rates.

a device placed on a piece of equipment that is lowered into a wellbore so that the equipment may be retrieved by wire line.

abbreviation: Water-Oil-Gas

A facility designed:

1. To achieve the recovery of natural gas liquids from the stream of natural gas which may or may not have been processed through lease separators and field facilities, and

2. To control the quality of the natural gas to be marketed.

see direct-indicating viscometer, vibrating screen; see shale shaker.