Drilling

Drilling

Of or relating to the penetration of the Earth's surface in order to extract petroleum oil.

Contributors in Drilling

Drilling

A drilling technique whereby gases (typically compressed air or nitrogen) are used to cool the drill bit and lift cuttings out of the wellbore, instead of the more conventional use of liquids. The ...

settling pit

Oil & gas; Drilling

A drilling mud filled open steel or earthen berm tank that is not stirred or circulated. By having mud slowly pass through such a container, most large drilling solids sink to the bottom, cleaning ...

water-base drilling fluid

Oil & gas; Drilling

A drilling fluid (mud) in which water or saltwater is the major liquid phase as well as the wetting (external) phase. General categories of water-base muds are fresh water, seawater, salt water, ...

antiwhirl bit

Oil & gas; Drilling

A drill bit, usually polycrystalline diamond compact bit (PDC) type, designed such that the individual cutting elements on the bit create a net imbalance force. This imbalance force pushes the bit ...

emulsion

Oil & gas; Drilling

A dispersion of one immiscible liquid into another through the use of a chemical that reduces the interfacial tension between the two liquids to achieve stability. Two emulsion types are used as ...

oil-in-water emulsion

Oil & gas; Drilling

A dispersion of oil droplets into an aqueous medium. This describes an emulsion mud, as contrasted with an invert-emulsion mud. The term should not be used to refer to synthetic-in-water emulsion ...

whole-mud dilution

Oil & gas; Drilling

A dilution process which involves selective dumping of the active system (such as sand traps and "bottoms up" mud) and replacement of the lost volume with fresh mud. This process has proved ...