Title:
Core sampling arrangement for operation inside geological layers
United States Patent 3016959
Inventors:
Pierre, Berthelin Bruno
Application Number:
US73662858A
Publication Date:
01/16/1962
Filing Date:
05/20/1958
Assignee:
Schlumberger, Prospection
Primary Class:
Other Classes:
175/58
International Classes:
E21B49/04
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US Patent References:
0064045N/A1867-04-23