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:
Mar. 29, 1977
Filed:
Oct. 28, 1975
Thomas C Mondshine, Houston, TX (US);
N L Industries, Inc., New York, NY (US);
Abstract
An improved method of consolidating the surface of a borehole in an incompetent formation and simultaneously strengthening the bond between the surface of the borehole and cement placed in the borehole is achieved by forcing an aqueous solution of a multivalent cation salt into the formation, thereafter forcing an alkali metal silicate solution which has a pH less than 12.0 containing at least 12% by weight silica into the formation, and thereafter forcing an aqueous cement slurry containing at least 2% by weight of a water soluble multivalent cation salt to contact the surface of the borehole. A cementitious piling intimately bonded to the formation is prepared by filing the stabilized borehole with an aqueous cement slurry and allowing the cement to harden.