Offshore drilling method and apparatus
United States Patent 3196958

Inventors:
Travers, William J.
Leake, William D.
Publication Date:
07/27/1965
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Assignee:
RICHFIELD OIL CORP
Primary Class:
175/7
Other Classes:
166/350, 166/355
International Classes:
E21B7/128; E21B7/12
US Patent References:
2606003Off-shore drilling
2684575Submergible type offshore drilling structure
2777669Marine well drilling apparatus
2788073Well head apparatus
2906500Completion of wells under water
2923531Drilling
3015360Method and apparatus for underwater drilling
3017934Casing support