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Drilling riser joints with buoyancy modules. A drilling riser is a conduit that provides a temporary extension of a subsea oil well to a surface drilling facility. Drilling risers are categorised into two types: marine drilling risers used with subsea blowout preventer (BOP) and generally used by floating drilling vessels; and tie-back drilling risers used with a surface BOP and generally ...
NOV Inc., formerly National Oilwell Varco, is an American multinational corporation based in Houston, Texas.It is a worldwide provider of equipment and components used in oil and gas drilling and production operations, oilfield services, and supply chain integration services to the upstream oil and gas industry.
The manufacturing operations of the company at 2nd and Girard Streets in Houston, Texas, where it was located in the 1910s. Today, the site of the building is on the campus of University of Houston–Downtown. A February 1914 advertisement for the Sharp-Hughes Tool Company in Fuel Oil Journal.
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Grant Prideco, Inc. is a supplier of drill pipe and drill stem accessories headquartered in Houston, Texas.Since 2008, it has been a subsidiary of energy services company NOV Inc. Grant Prideco was included on the Fortune magazine top 1000 largest corporations for several years in the mid-2000s [1] [2] and through the 1990s and early 2000s was the world's largest oilfield drill pipe supplier.
Nabors Industries Limited is an American global oil and gas drilling contractor that has operated since 1972. Based in Houston, Texas, Nabors operates the world’s largest land drilling rig fleet, with around 500 rigs operating in over 25 countries – in almost every significant O&G basin on the planet. It also has the largest number of high ...
The marine riser is connected to the wellhead on the sea bed and therefore the tensioner must manage the differential movements between the riser and the rig. If there were no tensioner and the rig moves downward, the riser would buckle; if the rig rises then high forces would be transmitted to the riser and it would stretch and be damaged.
Dresser Industries was a multinational corporation headquartered in Dallas, Texas, United States, which provided a wide range of technology, products, and services used for developing energy and natural resources.