Underwater well drilling method and apparatus
United States Patent 3163238

Inventors:
Malott, Raymond A.
Publication Date:
12/29/1964
View Patent Images:
Download PDF 3163238 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
SHELL OIL CO
Primary Class:
175/5
Other Classes:
175/7, 175/257
International Classes:
E21B7/12
Foreign References:
GB847769A
GB874178A