Submerged elevated well head structure
United States Patent 3004612
US Patent References:
/0962019.html
- - 0962019
Marine foundation and method of construction
- - 2236682
Marine drilling
- - 2512783
Submersible deepwater drilling apparatus
- - 2589146
Marine drilling
- - 2637978
/0962019.html
- - 0962019
Marine foundation and method of construction
- - 2236682
Marine drilling
- - 2512783
Submersible deepwater drilling apparatus
- - 2589146
Marine drilling
- - 2637978
Inventors:
Kofahl, David C.
Publication Date:
10/17/1961
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Export Citation:
Assignee:
RICHFIELD OIL CORP
Primary Class:
Other Classes:
175/9, 175/10, 166/368
International Classes:
E21B7/04; E21B7/12; E21B7/128; E21B33/037; E21B33/03