A device fitted with shaped charges or bullets that is lowered to the desired depth in a well and fired to create penetrating holes in casing, […]

1) a measure of the ease with which a fluid flows through the connecting pore spaces of rock or cement. The unit of measurement is the […]

Oil or gas obtained from the rocks of the earth. See hydrocarbons.

The male section of a tool joint. See tool joint.

See horizontal tubular.

An arm-based machine that usually transitions drill pipe from the horizontal to the vertical position in a single motion. It is usually rotated around a fixed […]

A sealing component for a blowout preventer that closes the annular space between the pipe and the blowout preventer or wellhead. See annular space and blowout […]

See Driller’s Chair

An immobile, offshore structure constructed on pilings from which wells are drilled, produced, or both.

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 […]

1) the condition of being porous (such as a rock formation). 2) the ratio of the volume of empty space to the volume of solid rock […]

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