دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a sucker rod pumping unit. not commonly used. that employs cable wound around a spool. one end going into the hole. the other with a suspended counterweight. This type of unit can achieve 40- to SO-foot ( 12- to 24- metre) stroke lengths. reducing dynamic loads, rod reversals. gas locking. and power usage and can be applied to deep pump applications

n: the vertical loading caused by the speed changement of thd drilling pipe during tripping

n: exerting force with continuous movement. i.e.. cyclic stressing.

n: an increase in the effective stroke length of the plunger of a sucker rod pump caused by the elongation of the rod string due to the dynamic loads imposed by the pumping cycle.

n: an arbitrarily defined measure of resistance of a material to indentation under static or dynamic load.

a form of hydrodynamic loading of deep water structures that may lock into a structure’s natural vibration frequency. May include loop currents.