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:
Jun. 29, 2010
Filed:
Jan. 15, 2009
Andrew J. Bradbury, Banchory, GB;
Christopher A. Sawdon, Par, GB;
Sonny Clary, Independence, LA (US);
William M. Reid, Tomball, TX (US);
Tom Heinz, Katy, TX (US);
Andrew J. Bradbury, Banchory, GB;
Christopher A. Sawdon, Par, GB;
Sonny Clary, Independence, LA (US);
William M. Reid, Tomball, TX (US);
Tom Heinz, Katy, TX (US);
M-I L.L.C., Houston, TX (US);
Abstract
A method of treating a wellbore that includes circulating a wellbore fluid in the wellbore, wherein the wellbore fluid comprises an oleaginous base fluid and a wellbore additive colloidal solid material, and wherein the wellbore additive colloidal solid material is formed by grinding a solid particulate material and a polymeric dispersing agent for a sufficient time so that the polymeric dispersing agent is absorbed to the surface of the resulting colloidal solid particles and less than 10% of the resulting colloidal solid particles have a diameter greater than 10 microns, but not more than five percent of the particles are less than 0.2 micron in diameter, wherein the grinding is carried out in the presence of an oleaginous base fluid and wherein the grinding is carried out so that the wellbore additive colloidal solid material has a weight average particle diameter dless than 2.0 microns.