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:
Feb. 14, 2006
Filed:
Dec. 30, 2000
Fersheed K. Mody, Houston, TX (US);
Kenneth W. Pober, Houston, TX (US);
Chee P. Tan, City Beach, AU;
Calum J. Drummond, Ivanhoe, AU;
George Georgaklis, Waverley, AU;
Darrell Wells, Rowville, AU;
Fersheed K. Mody, Houston, TX (US);
Kenneth W. Pober, Houston, TX (US);
Chee P. Tan, City Beach, AU;
Calum J. Drummond, Ivanhoe, AU;
George Georgaklis, Waverley, AU;
Darrell Wells, Rowville, AU;
Abstract
A method is disclosed that affords improved stability to wellbores during drilling in argillaceous formations with water-based drilling fluids. The method comprises adding to the drilling fluid a compound of the invention having the capacity in water to generate a highly efficient membrane on argillaceous materials. The compound is soluble in the drilling fluid at least at the pH at which the compound is added to the drilling fluid or exists in the drilling fluid, but is insoluble in the water in the pores of the argillaceous formations, or at least at the pH of the water in such pores.