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:
May. 16, 1989
Filed:
Jan. 04, 1988
Randy D Hazlett, Dallas, TX (US);
Paul Shu, Princeton Junction, NJ (US);
Mobil Oil Corp., New York, NY (US);
Abstract
A method for reducing the permeability in a desired area of a formation wherein a foamed gel is formed in-situ by injecting a solution into said formation. Said solution comprises a gellable composition including water; a cross linkable polysaccharide biopolymer; an aminoplast resin which reinforces said biopolymer; and sufficient transitional metal ions to form a gel of the desired size and strength. The gelled solution is foamed by including therein a chemical surfactant, and a chemical blowing agent. Once in the formation to the desired depth, the chemical blowing agent decomposes and generates a gas sufficient to foam the gelled solution. The gelled foam stiffens and reduces the permeability in a desired area.