Some Observations Of An Important Though Largely Over-Looked Factor In The Understanding And Optimizing Of Certain Beam And Sucker Rod Pumping Applications

In many applications, an important aspect of beam and sucker rod pumping operation and analysis has been generally unrecognized. This paper reviews and emphasizes not only this deficiency, but also the intrinsic value of several classes of dynamometer card shapes and slopes, to certain pumping unit geometries and applications. A basic understanding of the nature, character and shape of the polished rod dynagraph, and its relationship to the particular pumping unit geometry selected - coupled with the modern analytical techniques of S. G. Gibbs and others - should materially assist the designer in determining a more effective beam and rod pumping system.