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Form utility involves changing raw materials or putting parts together to make them more useful.

Oil Rig Systems - Oil rig systems include the power, mechanical and circulation systems. Learn about the various oil rig systems and find out what the oil derrick does.

Mud circulation in the hole! HowStuffWorks "Oil Rig Systems" www.thedrillingpeople.com

Oil Rig Systems - Oil rig systems include the power, mechanical and circulation systems. Learn about the various oil rig systems and find out what the oil derrick does.