Abstract
ABSTRACT Theoretically, it is possible to effect a significant reduction in peak (in-balance) torque, with resulting cost savings, in a beam and sucker rod pumping system by two different methods. The first is the optimum selection of unit geometry; while the second employs a special, low inertia (or high slip) prime mover, permitting the unit's speed variation to more closely respond to the torsional load demand. Following is a discussion of a comparative study using the most advanced predictive technique, covering two field applications, which illuminates the relative effectiveness and economy of both methods on the torsional loading of beam pumping units, as well as the effect on other selected parameters.
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