Oil & Gas Glossary 1.0

(obsolete) natural gasoline.

The liquid hydrocarbons recovered from wet natural gas, i.e., casinghead gasoline.

The gasoline extracted from natural gas by putting the gas into contact with oil in a vessel and subsequently distilling the gasoline from the heavier oil.

A fluid of vapor composed of hydrocarbons; dry gas is nearly free of oil and gasoline vapor.

An obsolete term for a casinghead.

(oil well gas) is associated and dissolved gas produced along with crude oil from oil completions.

A process used to repair a hole in the casing by pumping cement down tubing or drill pipe. First, the casinghead, or bradenhead, is closed to prevent fluids from moving up the casing. Then the rig's pumps are started. Pump pressure moves the cement out of the tubing or pipe and, since the top of the casing is closed, the cement goes into the hole in the casing. The tubing or pipe is pulled from the well and the cement allowed to harden. The hardened cement seals the hole in the casing. Although the term "bradenhead squeezing" is still used, the term "bradenhead" is obsolete. See annular space, casinghead, squeeze.

A hole dug, usually before drilling of a well, to allow working space for the casinghead equipment.

Commonly called casinghead gas; gas that is produced with oil or from the casing head of an oil well.

(1) separating casinghead gas from produced crude oil and water at the temperature and pressure conditions of the separator; and

A circular device with a frictional gripping arrangement of slips and packing rings used to suspend casing from a casinghead in a well

A heavy, flanged steel fitting connected to the first string of casing. It provides a housing for slips and packing assemblies, allows suspension of intermediate and production strings of casing, and supplies the means for the annulus to be sealed off. Also called a spool.

The drawworks drum. Also a casinghead or drilling spool.; to wind around a drum

The equipment installed at the surface of the wellbore. A wellhead includes such equipment as the casinghead and tubing head. adj: pertaining to the wellhead (e.g., wellhead pressure).

A substance that consists of large molecules formed from smaller molecules in repeating structural units (monomers). In oilfield operations, various types of polymers are used to thicken drilling mud, fracturing fluid, acid, water, and other liquids. See micellar-polymer flooding, polymer mud. In petroleum refining, heat and pressure are used to polymerize light hydrocarbons into larger molecules, such as those that make up high-octane gasoline. In petrochemical production, polymer hydrocarbons are used as a feedstock for plastics.