دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

an artificial lift system, common to low pressure, lower rate oil wells, with a plunger type bottom hole pump operated from the surface by a rod string.

v: to cause the pump on a pumping unit to hit the bottom of the well by having too long a sucker rod string in the unit.

rod string stoke too long and hitting the bottom of the pump.

n: a special wrench designed for use in connecting the cage of a sucker rod pump to the sucker rod string.

a wrench for connecting the cage of a sucker rod pump to the rod string.

the rotating weights on a beam lift pump jack that offset the weight of the rod string.

n: stress that occurs on a pipe. vessel. or machine in cycles. such as the sucker rod string.

n: 1. an instrument or assembly of instruments used to measure torque and other force-related properties of rotating or reciprocating machinery. 2. in sucker rod pumping, a device used to indicate a variation in load on the polished rod as the rod string reciprocates. A continuous record of the result of forces acting along the axis of the polished rod is provided on a dynamometer card, from which an analysis is made of the performance of the well pumping equipment.

a recording of the stresses in a rod string of a beam pumping unit.

n: a sucker rod pump that is run into the well as a complete unit.

a pump run on a sucker rod string and set in a pump barrel, then powered with the sucker rod pump.

a sucker rod string that has broken or come apart in the well.

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.