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DD – directional driller or directional drilling; DDC – daily drilling cost; DDC – de-watering and drying contract; DDBHC – DDBHC waveform log [clarification needed] DDET – depth determination log; DDM – derrick drilling machine (a.k.a. top drive) DDNL – dual det. neutron life log; DDPT – drill data plot log; DDPU – double ...
Valaris Limited (previously ENSCO-Rowan plc) is an offshore drilling contractor headquartered in Houston, Texas, and incorporated in Bermuda. It is the largest offshore drilling and well drilling company in the world, and owns 52 rigs, including 36 offshore jackup rigs, 11 drillships, and 5 semi-submersible platform drilling rigs. [1]
Drill cuttings can be separated from liquid drilling fluid by shale shakers, by centrifuges, or by cyclone separators, the latter also being effective for air drilling. In cable-tool drilling, the drill cuttings are periodically bailed out of the bottom of the hole. In auger drilling, cuttings are carried to the surface on the auger flights.
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.
Offshore drilling began in California in 1896, when operators in the Summerland Oil Field in Santa Barbara County followed the field into the ocean by drilling from piers built out over the ocean. Leasing California state seabed is controlled by the State Lands Commission, which halted further leasing of state offshore tracts after the Santa ...
Heavy-weight drill string part due to stress cracking. Tripping pipe (or "Making a round trip" or simply "Making a trip") is the physical act of pulling the drill string out of the wellbore and then running it back in.
Seadrill is an offshore drilling contractor providing worldwide offshore drilling services to the oil and gas industry. Its primary business is the ownership and operation of drillships, semi-submersible rigs, and jack-up rigs for operations in shallow to ultra-deep water in both benign and harsh environments. It provides a contract-based ...
Dolphin Drilling Holdings Limited is an offshore drilling rig company headquartered in Aberdeen, Scotland, United Kingdom with its main subsidiary Dolphin Drilling AS located in Sandnes, Norway. Until 2019, Dolphin Drilling had its headquarters in Oslo, Norway. The company offers services for the offshore industry within offshore drilling.