Any of a number of liquid and gaseous fluids and mixtures of fluids and solids (as solid suspensions, mixtures and emulsions of liquids, gases and solids) used in operations to drill boreholes into th [..]

The term "mud" is usually synonymous with drilling fluid. Drilling mud (or mud) is composed of water-based, oil-based, and synthetic-based fluids used in drilling operations, [..]

is fluid used to aid the drilling of bores into the earth. It may include water, clay, hydrocarbons or other chemicals.

The circulating fluid used to bring cuttings out of the well bore, to cool the drill bit, and to provide hole stability and pressure control. Drilling mud includes a number of additives to maintain the mud at desired viscosities and weights. Some additives that may be used are caustic, toxic, or acidic.

Drilling mud is the liquid that circulates from top to bottom inside drill pipes and back from bottom to top in the space between the wellbore and the drill string (known as the annulus) when oil well [..]

Specialized fluid made up of a mixture of clays, water (sometimes oil) and chemicals, which is pumped down a well during drilling operations to lubricate the system, remove cuttings and control pressu [..]

A mixture of clays, water, and chemicals used in drilling operations to lubricate and cool the drill bit, carry drilling wastes to the surface, prevent the walls of the well from collapsing, and to ke [..]

dril-ling mud Mixture of base substance and additives used to lubricate drill bit and to counter act natural pressure in formation. Drilling mud provides circulation, flushing rock cuttings from bottom of well bore to surface.

a mixture of clays, water and chemicals pumped down the drill string and up the annulus during drilling in order to lubricate the system, carry away rock cuttings, maintain the required pressure at th [..]

A common term for drilling fluids.

Drilling fluid used to clean and lubricate the drilling process, recover samples of the sub-surface formations to surface and to counteract the natural pressure of the formation. Drilling rig

A mixture of clays, water, and chemicals used in drilling operations to lubricate and cool the drill bit, carry drilling wastes to the surface, prevent the walls of the well from collapsing, and to ke [..]

A fluid used to aid the drilling of boreholes.

A mixture of clay, water, chemical additives, and weighting materials that flushes rock cuttings from a well, lubricates and cools the drill bit, maintains the required pressure at the bottom of the well, prevents the wall of the borehole from crumbing or collapsing, and prevents other fluids from entering the well bore.

A specially compounded liquid circulated through the wellbore during rotary drilling operations.

Mixture of water and special additives circulating within the well for the purpose of cooling the drill-bit; removing rock cuttings and transporting them back up to the surface. Also prevents the well wall from caving in and maintains sufficient pressure at the well bottom to avoid hydrocarbon blowout. Further Reading