Drilling rig classification-By power used

Drilling rig classification-By power used

• Mechanical — the rig uses torque converters, clutches, and transmissions powered by its own engines, often diesel
• Electric — the major items of machinery are driven by electric motors, usually with power generated on-site using internal combustion engines
• Hydraulic — the rig primarily uses hydraulic power
• Pneumatic — the rig is primarily powered by pressurized air
• Steam — the rig uses steam-powered engines and pumps (obsolete after middle of 20th Century)