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Definition - What does Drilling Rig mean? A Drilling Rig is a piece of equipment that is used to create holes or wellbores in the earth's surface. Rigs are massive structures that house all the drilling equipment on board. Some of the major components of a drilling rig are: Mud tanks Mud pumps Mast / Derrick Top drive also known as rotary table Drill string Draw works Primary power generation equipment & auxiliary power generation equipment. Petropedia explains Drilling Rig Drilling rigs are one of the most important machines in the E&P activities of the Oil and Gas Industry. They can be massive or small to medium sized structures. The small to medium sized rigs are also called mobile rigs as they are mounted on trucks or trailers and can be easily transferred from one location to another location on wheels. The massive structure rigs can be either onshore rigs or offshore rigs. Onshore rigs are rigs that perform drilling activities on land, whereas offshore rigs are rigs that perform drilling activities in sea or ocean. Some of the types of drilling rigs used are as follows: Land Rigs (onshore rigs) Barge Rigs (operates in shallow water) Jack up Rigs (operates in water at a depth of 500 ft) Semi-Submersible Anchored / Moored Rigs (operates in water up to depths of 10,000 ft) Dynamically positioned vessel for Deep or Ultra Deep Water drilling (up to 12,000 ft).
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