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:
Nov. 23, 1976
Filed:
Apr. 18, 1975
Richard L Clampitt, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
An improved process for decreasing the permeability of a subterranean oil-bearing formation which comprises injecting an aqueous surfactant solution containing a chemically crosslinkable, water-dispersible polymer which prevents the surfactant from foaming until it is in the formation and after the polymer breaks down due to heat in the formation caused by steam which is used to carry the aqueous solution into the formation. In accordance with one embodiment, gelled or ungelled cellulose ether polymers in an aqueous surfactant solution are injected with steam into the more permeable or more depleted portions of a subterranean oil-bearing formation to produce a selective blocking due to the formation of foam in the more permeable sections of the formation which forces the remaining injection steam to produce oil from less depleted portions of the formation.