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. 09, 1991
Filed:
Jan. 02, 1990
Robert H Friedman, Houston, TX (US);
Billy W Surles, Houston, TX (US);
Texaco Inc., White Plains, NY (US);
Abstract
Wells penetrating oil-producing and water-producing intervals may be treated in order to reduce the flow rate of water into the well by isolating the water-producing interval and introducing into it a volume of treating fluids sufficient to invade at least six inches into the water-producing interval. Cased wells may be treated to plug holes in the casing caused by corrosion or casing breaks by introducing a treating fluid into the formation adjacent to the break. The treating fluid comprises a material which can be acid catalyzed in a period of from 1 to 16 hours at formation conditions, preferably a monomer or oligomer of furfuryl alcohol. The treating fluid contains from 40 to 60 percent furfuryl alcohol and from 40 to 60 percent of an ester, preferably ethyl acetate or butyl acetate. The catalyst is preferably orthonitrobenzoic acid or toluene sulfonic acid in a concentration of from 1 to 4 percent by weight, selected to produce a set time at the formation temperature in the range of from 1 to 16 hours. The treating fluid also contains an effective amount in the range of 0.5 to 1.5 percent of a water swelling polymer, preferably a copolymer of starch and synthetic polymer (acrylates or acrylamides) to prevent shrinkage of the furfuryl alcohol on polymerization.