Title:
Method of and apparatus for opening oil-and gas-bearing strata
United States Patent 2819673


Inventors:
Cecil, Clyde J.
Courter, Leo A.
Olson, Clarence R.
Application Number:
US32930453A
Publication Date:
01/14/1958
Filing Date:
01/02/1953
Assignee:
DOW CHEMICAL CO
Primary Class:
Other Classes:
89/1.15, 102/310
International Classes:
E21B43/117
View Patent Images: