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Engineering Practice with Oilfield and Drilling Applications
Donald W. Dareing
Donald W. Dareing
University of Tennessee
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In 1951 Vogelpohl [1] estimated that about ⅓ to ½ of energy produced is consumed by friction. Considering all automobiles, trucks, and other modes of transportation plus machinery used in manufacturing, it is not surprising the level of energy lost to friction is large. Also, equipment wears out because of friction and must be replaced; another economic loss. Because of this, mechanical friction and wear became a focus of research during the early 1960s. A study conducted (1966) in Great Britain by Jost [2] concluded that by following good design and lubrication procedures, about 500-million-pound sterling could be saved per year. Studies in Europe and America have reached similar conclusions. The general area of friction and wear became known the science of tribology, a Greek word meaning a study of friction, lubrication, and wear between moving surfaces.

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