Tongs that are actuated by air or hydraulic fluid and are used for making up or breaking out sucker rods

Abbreviation: pounds per gallon.

A gelled viscous fluid

A device for maintaining pressure in a line, downstream from the value.

Slang for gas separator.

See poor boy.

Sucker rods that have been broken and separated in a pumping well because of corrosion, improper loading, damaged rods, and so forth.

A special type of nuclear log that measures the depth of each casing collar.

Knowing the depth of the collars makes it easy to determine the exact depth of the formation to be perforated by correlating casing-collar depth with formation depth.

An opening or space within a rock or mass of rocks, usually small and often filled with some fluid (water, oil, gas, or all three).

Compare vug.

1.

A reduction in the amount of force a fluid exerts against a surface, such as the walls of a pipe.

It usually occurs because the fluid is moving against the surface and is caused by the friction between the fluid and the surface.

2.

The amount of pressure indicated by a drill pipe pressure gauge when drilling fluid is being circulated by the mud pump.

Pressure losses occur as the fluid is circulated.

A big tool for a small job, used to overcome some excess friction.

Trade name for a type of pit-level indicator.

See pit-level indicator.

A mast mounted on a truck and capable of being erected as a single unit.

See telescoping derrick.

A laboratory unit used in pilot testing.

One gram or pound equivalent, when added to 350 ml of fluid, is equivalent to 1 lb/bbl.

Ppg; a measure of the density of a fluid (such as a drilling mud).

Perforations in casing for the inflow of hydrocarbons and gas