In early oil exploration, drilling rigs were semi-permanent in nature and the derricks were often built on-site and left in place after the completion of the well. If the derrick design does not allow it to be moved easily in one-piece, special workers must assemble them piece by piece, and in some cases disassemble them if they are to be moved. Types: Single — Can hold only single drill pipes. The presence or absence of vertical pipe racking "fingers" varies from rig to rig.
Double — The derrick can hold two connected drill pipes, called a "double stand" or simply a "double". Triple — The derrick can hold three connected drill pipes: a "triple stand" or "thribble". Quadri — The derrick can hold four connected drill pipes, called a "quadri stand" or "fourble".
Derricks of this size are uncommon. Conventional — The derrick is vertical Slant — The derrick is slanted at a degree angle to facilitate horizontal drilling. Contact us today! Learn about the benefits of working with an officially certified API inspector when it comes to maintaining your equipment and protecting your workers.
What is Industrial Rig Welding? You may be wondering what an industrial rig welder does. Once the equipment is at the site, the crew sets the rig up. Here are the major systems of a land oil rig:. Casing - large-diameter concrete pipe that lines the drill hole, prevents the hole from collapsing, and allows drilling mud to circulate.
Circulation system - pumps drilling mud mixture of water , clay, weighting material and chemicals, used to lift rock cuttings from the drill bit to the surface under pressure through the kelly, rotary table, drill pipes and drill collars. Derrick - support structure that holds the drilling apparatus; tall enough to allow new sections of drill pipe to be added to the drilling apparatus as drilling progresses. Blowout preventer - high-pressure valves located under the land rig or on the sea floor that seal the high-pressure drill lines and relieve pressure when necessary to prevent a blowout uncontrolled gush of gas or oil to the surface, often associated with fire.
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