دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see phenolphthalein filtrate alkalinity.

n: 1. generic term for any compound that contains phosphorous and oxygen in the form of a phosphate, which is chemically abbreviated as PO4. 2. a salt or ester of phosphoric acid.

n: amylum derivant that made from amylum and phosphoric acid, it uses as filtrate reducer or stabilizer.

n: the absorption of gamma rays that results in ejection of electrons from an atom. Photoelectric effect occurs when light of sufficient energy falls on an atom and causes it to lose electrons. The energy of the light actually tears electrons away from the atoms of a substance.

n: a device used to determine the angle and direction by which a wellbore deviates from the vertical. After the instrument is run into the hole, it takes a photograph that is then brought to the surface, developed, and analysed. Photographic survey instruments can be single-shot or multishot and magnetic or gyroscopic.

n: see diapir. piezoelectric crystal n: a crystal that generates electrical current as a result of the application of mechanical stress.

n: a method of predicting behavior of mud system by mixing small quantities of mud and mud additives, then testing the result.

n: a method of predicting behaviour of mud or cement systems by mixing small quantities of mud and mud additives or cement and cement additives and then testing the results.

n: tar asphalt paint , it prvents from corruption.


a lubricant, anti-gall and sealer applied to the pin threads when making a connection in the pipe.