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In recent years, a high level of awareness
of environmental issues led to soaring oil prices. These
events evoked the introduction of national, international
regulations and policies of how industries deal with
pollution and energy consumption. In oil drilling practice,
it has been reported that large amounts of the energy
imparted to the drill-string is consumed by friction in the
system. This book makes an attempt, if not to recover, then
at least utilise the energy consumed by friction. The...