دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the output of a transducer with zero measurand applied.

n: on an orifice chart, the point at which no differential pressure is exerted on the differential pen.

n: a condition wherein the drilling fluid fails to form measurable gels during a quiescent interval (usually 10 minutes).

a brand name of a tool used to deliver rapid impact stokes to a small BHA downhole. Operated by fluid flow. Usually run on CT.

n: electrokinetic potential of a particle as determined by its electrophoretic mobility. This electric potential causes colloidal particles to repel each other and stay in suspension.

It is a important index mark of measuring the stability of drilling fluid.

a brine made of salts of zinc, usually very dense.

A acidic salt, ZnBr2, which is used to prepare dense, clear (solids-free) brine for well completion and workover operations. The density of saturated zinc bromide is approximately 20 lbm/gal, but its pH is low and can cause acidic corrosion and handling p

A neutral zinc salt, ZnCO3, which can be used as a sulfide scavenger in water-base muds. Zinc carbonate is less soluble than zinc basic carbonate and perhaps slower to react with sulfide ions. Treatment level is about 0.1 lbm/bbl per 50 mg/L sulfide ion (

n: (ZnCI2) a very soluble salt used to increase the density of water to points more than double that of plain water. Normally added to a system first saturated with calcium chloride.

ZnCrO4,yellow powder,poisonous and can cause cancer,which is mainly as a depressor of corruption.