Abbreviation: parts per million

Nipple; a device through which fluid is circulated.

A hydraulically powered device used in lieu of a rotary to turn the drill pipe, tubing, or casing in a well.

A mechanical fluid-measuring device that measures by filling and emptying chambers of a specific volume.

The displacement of a fixed volume of fluid may be accomplished by the action of reciprocating or oscillating pistons, rotating vanes or buckets, rotating disks, or tanks or other vessels that automatically fill and empty.

Also called a volume meter or volumeter.

The maximum volume of oil or gas that a well is capable of producing, calculated from well test data.

A test of the maximum rate at which a well can produce oil.

One of the alkali metal elements with a valence of 1 and an atomic weight of about 39.

Potassium compounds, most commonly potassium hydroxide (koh), are sometimes added to drilling fluids to impart special properties, usually inhibition.

A substance, usually a solid, that separates from a fluid because of a chemical or physical change in the fluid.

V: to separate in this manner

Rating given by a manufacturer of an engine operating at most efficient output.

The pressure in a vessel or container as registered on a gauge attached to the container.

This reading does not include the pressure of the atmosphere outside the container.

The cement most widely used in oilwells.

It is made from raw materials such as limestone, clay or shale, and iron ore.

A choke in which the orifice size must be changed to change the rate of flow through the choke.

Of a sand or sandstone; having pores, or tiny openings, as in rock

Abbreviation: the phenolphthalein alkalinity of the mud reported as the number of milliliters of 0.02 normal (n/50) add required per milliliter of mud

A method for indicating hook load or force, read off rig’s indicator; 1 point = 1,000 pounds