The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1976
Filed:
Oct. 24, 1975
Applicant:
Inventors:
Paul W Fischer, Whittier, CA (US);
D Stephen Pye, Brea, CA (US);
Assignee:
Union Oil Company of California, Brea, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; E21B / ;
U.S. Cl.
CPC ...
175 69 ; 175 71 ; 166309 ; 252 / ;
Abstract
A method of conducting foam drilling and workover operations in a bore hole penetrating a subterranean formation, particularly a high-temperature formation such as a geothermal formation, employing an aqueous solution of a N-acyl-N-methyltaurate foaming agent having the formula: ##STR1## wherein R is a straight chain alkyl group having from 9 to 15 carbon atoms; and M is an alkali metal or ammonium cation, with sodium being preferred. A particularly preferred foaming agent is sodium N-palmitoyl-N-methyltaurate.