Title:
Whipstock
United States Patent 2227347
Inventors:
Jack, Johnson
Publication Date:
12/31/1940
Export Citation:
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Assignee:
John, Heaston W.
Primary Class:
166/55.3
Other Classes:
29/254, 30/106, 30/DIG.4, 166/117.6, 166/214
International Classes:
E21B7/06; E21B7/08; E21B23/01; E21B23/04; E21B29/00; E21B7/04; E21B23/00; E21B29/00
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