Chevron is about to put the first deepwater drillship designed with the capacity to perform ‘dual gradient drilling’ to work. The ship is a Samsung 12000 design capable of operating in 12,000 ft ...
Dilution-based dual-gradient drilling (DGD) reduces casing strings and drilling costs while increasing hole size at total depth by injecting mud down an artificially-created annulus with a different ...
HOUSTON, May 4-- As others prepare to field test subsea pumps for dual gradient drilling in ultradeep water, Stewart & Stevenson Service Inc.'s Petroleum Equipment Division in Houston has introduced ...
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