Finely divided particles of ultramicroscopic size swimming in a liquid.

A method for killing well pressure in which circulation is commenced immediately and mud weight is brought up in steps, or increments, usually a point at a time.

Also called circulate-and-weight method.

The joining of two length of pipe.

The ratio of the actual volume of gas at a given temperature and pressure to the volume of gas when calculated by the ideal gas law.

Low-solids fluid or drilling mud used when a well is being completed.

It is selected not only for its ability to control formation pressure, but also for the properties that minimize formation damage.

A long, continuous length of pipe wound on a spool.

The pipe is straightened prior to pushing into a wellbore and recoiled to spool the pipe back onto the transport and storage spool.

Depending on the pipe diameter (1 in.

To 4 1/2 in.) and the spool size, coiled tubing can range from 2000 ft to 15,000 ft [610 to 4570 m] or greater length.

May be used for drilling; i.e.

Coiled tubing drilling.

see also reeled tubing.

abbr.

Ct

Tubing pressure acting on the net piston area and causing a force to be exerted on a mandrel.

A colloidal suspension containing one or more colloidal constituents

A liquefied hydrocarbon consisting chiefly of butane to butylenes and conforming to the gpa specification for commercial butane defined in gpa publication 2140.

1.

Refers to the installation of permanent equipment for the production of oil or gas.

2.

The hardware used to optimize the production of hydrocarbons from the well.

This may range from nothing but a packer on tubing above an openhole completion (“barefoot” completion), to a system of mechanical filtering elements outside of perforated pipe, to a fully automated measurement and control system that optimizes reservoir economics without human intervention (an “intelligent” completion).

Hydrocarbons which are in the gaseous state under reservoir conditions but which become liquid either in passage up the hole or at the surface.

Pertaining to a colloid, i.e., involving particles so minute (less than 2 microns) that they are not visible through optical microscopes.

Bentonite is an example of a colloidal day.

The change in volume per unit of volume of a liquid caused by a unit change in pressure at constant temperature

A pipe coupling threaded on the inside.

A short string of large-diameter casing used to keep the wellbore open and to provide a means of conveying the upflowing drilling fluid from the wellbore to the mud pit.