Proceedings Volume Cover
PREFRINT--SUBJECT TO CORRECTION  
Paper No. 875-l6-K  
For release: Afternoon papers, April 13, 1962  
Morning papers, April 14, 1962  
NOTICE TO EDITORS: Permission is hereby granted to reprint this paper on or  
after April 13, 1962, providing that the auspices under which it was presented  
be conspicuously acknowledged, the author's name and affiliation be stated,  
and that the original title, if not used, be stated in the acknowledgment. If  
reprinted in installments, the foregoing conditions apply to each installment.  
by  
w. A. Roberts  
Phillips Petroleum Company  
Bartlesville, Oklahoma  
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For presentation at the  
Spring Meeting of the Rocky Mountain District  
Division of Production  
Denver Hilton Hotel, Denver, Colorado  
April 11-13, 1962  
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(The statements and oplnlons expressed herein are  
those of the author and should not be construed  
as an official action or opinion of the Institute.)  
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Division of Production  
American Petroleum Institute  
Dallas, Texas