Oil & Gas Glossary 1.0

A device installed on a gas lift mandrel, which in turn is put on the tubing string of a gas lift well. Tubing and casing pressures cause the valve to open and close, thus allowing gas to be injected into the fluid in the tubing to cause the fluid to rise to the surface.

The process of raising or lifting fluid from a well by injecting gas down the well through tubing or through the tubing-casing annulus. Injected gas aerates the fluid to make it exert less pressure than the formation does; consequently, the higher formation pressure forces the fluid out of the wellbore. Gas may be injected continuously or intermittently, depending on the producing characteristics of the well and the arrangement of the gas-lift equipment.

2. the drawworks; to raise or lift

2. gas injected in gas lift operations.

Injection of nitrogen for gas lift valving.

A well which produces oil or gas without any means of artificial lift.

A well using a pumping unit and rods to lift fluid.

A diagnostic tool used to ascertain the position of a gas leak in the tubing of a gas-lift well.

A diagnostic tool used to ascertain the position of a gas leak in the tubing of a gas lift well.

An offset heavy-wall sub in the production string for placing gas lift valves, and so on.

A method of lifting oil using a swab or free piston propelled by compressed gas from the lower end of the tubing string to the surface.

A blanking valve placed in a gas lift mandrel to block off annular communication to the tubing.

The maintenance work performed on an oil or gas well to improve or maintain the production from a formation already producing. It usually involves repairs to the pump, rods, gas lift valves, tubing, packers, and so forth

The first stage of oil production in which natural reservoir drives are used to recover oil, although some form of artificial lift may be required to exploit declining reservoir drives.

A special type of elevator designed to accommodate the end of a sucker rod. it allows the derrickman to transfer the rod to the racking platform from the regular elevator being used to lift the rod out of the well.

2. the cylindrical part of a sucker rod pump in which the piston-like plunger moves up and down. Operating as a piston inside a cylinder, the plunger and barrel create pressure energy to lift well fluids to the surface.

Specialized tools used to run equipment in a well, such as a wireline running tool for installing retrievable gas lift valves. Various tubing-type running tools are also used.

A diagnostic tool used to ascertain whether there is a gas leak in the tubing of a gas lift well. If there is a tubing leak, the pressure on the annulus will equal the pressure on the tubing.

The downhole assembly used to lift fluid to the surface by the reciprocating action of the sucker rod string. Basic components are barrel, plunger, valves, and hold-down. Two types of sucker rod pumps are the tubing pump, in which the barrel is attached to the tubing, and the rod, or insert, pump, which is run into the well as a complete unit.