دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: a slurry of portland cement and water and sometimes one or more additives that affect either the density of the mixture or its setting time. The portland cement used may be high early strength, common (standard),or slow setting. Additives include accelerators (such as calcium chloride),retarders (such as gypsum),weighting materials (such as barium sulphate),lightweight additives (such as bentonite),or a variety of lost circulation materials (such as mica flakes).

n: The bonding material for cementing.

n: a special drilling fluid that contains a salt or an ester of formic acid (formate),which is chemically combined with another element such as potassium or cesium. Formate fluids are very stable at high temperatures and can be made very dense (heavy) without adding weighting materials such as barite. Formate fluids are used as completion fluids because they minimise formation damage. See completion fluid, formation damage.

v: to prepare drilling fluids from a mixture of water or other liquids and any one or more of the various dry mud-making materials (such as clay, weighting materials. and chemicals).

n: the process that mixes the water or other fluid with a kind or more kinds of material .

n: a material that has a high specific gravity and is used to increase the density of drilling fluids or cement slurries.

n: A high-specific gravity and finely divided solid material used to increase density of a drilling mud. (Dissolved salts that increase fluid density, such as calcium bromide in brines, are not called weighting materials.) Barite is the most common, with min

solids added to increase density in a fluid.