Translations:Dictionary:Drill rig/2/en

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FIG. D-28. Drill rig. A drilling rig includes component systems for hoisting the drill pipe and other equipment, a system for delivering energy to (and rotating) the drill bit, and a circulation system for removing rock fragments, plastering the drill hole, controlling formation pressure, cooling the bit, etc.[1]
  1. Gerding, Mildred (1986). Fundamentals of petroleum. Petroleum Extension Service, Univ of Texas at Austin. p. 112. ISBN 0886981220.