Offshore oil well installation
United States Patent 2854215
US Patent References:
/0272722.html
- - 0272722

/1262075.html
- - 1262075

Underwater drilling
- - 2171672

Marine oil drilling machine
- - 2534480

Apparatus for underwater oil well drilling
- - 2783970


Inventors:
Cox Jr., William R.
Howe, Richard J.
Publication Date:
09/30/1958
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Assignee:
Shell, Dev
Primary Class:
166/356
Other Classes:
405/194, 137/236.100, 166/358
International Classes:
E21B33/037; E21B41/06; E21B33/03; E21B41/00