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:
Apr. 20, 1993
Filed:
Mar. 11, 1992
Applicant:
Inventors:
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166274 ; 166268 ; 166275 ; 166309 ; 252-8554 ;
Abstract
The recovery of hydrocarbons from subterranean formations is improved by the use of a mobility control fluid comprising a mixture of at least one alkylated diphenyl oxide and at least one amphoteric surfactant. A preferred mobility control fluid comprises the disodium salt of hexyldiphenyloxide disulfonate and cocamido-2-hydroxypropyl sultaine.