Drilling 4217129

== [http://pressdoc.com/p/000uqq drilling rigs] ==

[http://pressdoc.com/p/000uqq drilling rigs] is a machine which creates holes in the ground. 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. [Citation needed] They 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 public services, 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 are not drilling rig). The term "rig" therefore generally refers to a complex device that is used to penetrate the surface of the crust.

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Small and portable, such as those used in mineral exploration drilling, water wells and environmental investigations.
Huge, capable of drilling over a thousand meters crust. Large "mud pumps" circulate drilling mud (slurry) through the drill bit and to cover annulus, for cooling and removing "cuttings" while a well is drilled. Jacks on the stand can lift hundreds of tons of pipe. [http://pressdoc.com/p/000uqq shale wells] Other equipment can force acid or sand into reservoirs to facilitate extraction of oil or natural gas, and in remote locations can be permanent living accommodation and catering for crews (which may be more than a hundred). Marine kits may operate many hundreds of miles or kilometers distant from the supply base with infrequent crew rotation or cycle.

Oil and [http://pressdoc.com/p/000uqq natural gas drilling] kits can be used not only to identify geologic reservoirs but also to create holes that allow the extraction of oil or natural gas from these reservoirs. Especially in the offshore oil and natural gas, once well was drilled, drilling rig will be moved off and well service rig (a smaller rig) that is purpose-built for the completed well will be moved to get well on the line. [1] This frees up the drilling rig to drill another hole and streamlines the operation as well as allows for specialization of certain services, ie completed vs. drilling.

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