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Drilling rigs can sample sub-surface mineral deposits, test rock, soil and groundwater physical properties, and also can be used to install sub-surface fabrications, such as underground utilities, instrumentation, tunnels or wells.
Drilling rigs can be mobile equipment mounted on trucks, tracks or trailers, or more permanent land or marine-based structures (such as oil platforms, commonly called 'offshore oil rigs' even if they don't contain a drilling rig).
There are many types and designs of drilling rigs, with many drilling rigs capable of switching or combining different drilling technologies as needed.
Drilling rigs can be described using any of the following attributes: (Rigs are differentiated by height based on how many connected pipe they are able to "stand" in the derrick when needing to temporarily remove the drill pipe from the hole.
Marine rigs may operate thousands of miles distant from the supply base with infrequent crew rotation or cycle.
Until internal combustion engines were developed in the late 19th century, the main method for drilling rock was muscle power of man or animal.
The technique of oil drilling through percussion or rotary drilling has its origins dating back to the ancient Chinese Han Dynasty in 500 BC, where percussion drilling was used to extract natural gas in the Sichuan province.
The skills involved the availability of heavy iron bits and long bamboo poles, the manufacturing of long and sturdy cables woven from bamboo fiber, and levers.
Oil and natural gas drilling rigs are used not only to identify geologic reservoirs but also to create holes that allow the extraction of oil or natural gas from those reservoirs.Typically this is done when changing a drill bit or when "logging" the well.) There are a variety of drill mechanisms which can be used to sink a borehole into the ground.Each has its advantages and disadvantages, in terms of the depth to which it can drill, the type of sample returned, the costs involved and penetration rates achieved.A drilling rig is a machine that creates holes in the earth sub-surface.Drilling rigs can be massive structures housing equipment used to drill water wells, oil wells, or natural gas extraction wells, or they can be small enough to be moved manually by one person and such are called augers.