دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

particles propelled at a velocity sufficient to cause cleaning or wearing away of a surface.

a perforating process involving pumping a slurry of liquid and size particles through a nozzle to cut through steel and rock.

n: a roller cone bit that is specially designed for air or gas drilling. It is very similar to a regular bit, but features screens over the bearings to protect them from clogging with cuttings and thicker hardfacing on the shirttail to protect them from abrasive, high-velocity air or gas drilling fluid.

n: A method of ferroalloy hardening. The purpose is hardening its surface to improve abrasiveness.

a shaped bit body with diamonds for abrasive cutting of the formation.

n: the factor responding the relationship beween other factors and drilling rate when the drilling pressure ,rotate speed and the abrasion of the tooth are constant

n: a restriction installed in a line in which fluid is flowing that produces a pressure differential. The volume of fluid can be determined by measurement of the differential. Flow nozzles can handle dirty and abrasive gases better than orifices.