دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: I. a reduction in the amount of force a fluid exerts against a surface, such as the walls of a pipe. It usually occurs be- cause the fluid is moving against the sur- face and is caused by the friction between the fluid and the surface. 2. the amount of pressure indicated by a drill pipe pressure gauge when drilling fluid is being circulated by the mud pump. Pressure losses occur as the fluid is circulated.