دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: ZnCO3,which can as the material of zinc-salt and be used to make desulphate
powder.

a job where the well is workover without killing the well. Usually accomplished by multiple barriers that seal on the tubulars.

n: the sodium or potassium salt of a high-molecular-weight fatty acid. Commonly used in drilling fluids to improve lubrication, emulsification, sample size, and defoaming.

n: a cylindrical-shaped filter made of cloth that fits inside a special holder in the line conducting the liquid to be filtered. Often used in glycol dehydration systems to filter glycol.

n: the half-neutralized sodium salt of carbonic acid, NaHCO2, used extensively for treating cement contamination and occasionally other calcium contamination in drilling fluids.

n: A chemical with the formula NaHCO3. It is called bicarb at the drilling rig and is used to treat cement contamination in water mud. When cement hydrates, substantial amounts of lime, Ca(OH)2, are produced. As the cement sets, less free lime is available.

used for treating cement contamination and calcium contamination in muds.

n: Usually as filtrate reducer and viscosifier.

n: common table salt, NaCl. It is sometimes used in cement slurries as an accelerator or a retarder, depending on the concentration.

n: NaCl,one of the main material of saliferous drilling fluid.

n: Na2CrO4. See chromate.

n: A type of salt in which chromium atoms are in the plus-6 valence state, such as potassium chromate, K2CrO4. Chromium compounds of various types have been used in lignite and lignosulfonate and other mud additives to enhance thermal stability. Since the la

n: A type of salt in which chromium atoms are in the plus-7 valence state, such as potassium dichromate, K2Cr2O7.

n: A group of salts formed by neutralization of phosphorous or phosphoric acid with a base, such as NaOH or KOH. Orthophosphates are phosphoric acid (H3PO4) salts, where 1, 2 or 3 of the hydrogen ions are neutralized. Neutralization with NaOH gives three sod