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:
Oct. 29, 2013
Filed:
Jan. 15, 2013
Jeffrey James Miller, Houston, TX (US);
Nicholas Braley, Houston, TX (US);
Donald R. Siems, Houston, TX (US);
Dale E. Jamison, Houston, TX (US);
Patrick Baker, Houston, TX (US);
Jeffrey James Miller, Houston, TX (US);
Nicholas Braley, Houston, TX (US);
Donald R. Siems, Houston, TX (US);
Dale E. Jamison, Houston, TX (US);
Patrick Baker, Houston, TX (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
Invert emulsion drilling fluids that have extended emulsion stability and reduced sag potential can be realized through incorporation of colloidal particles therein. The invert emulsion drilling fluids can be free of organophilic clays. The organophilic clay-free drilling fluids can comprise: an oleaginous fluid continuous phase; an aqueous fluid internal phase; a surfactant; a weighting agent; and a plurality of colloidal particles, the colloidal particles comprising fibrous colloidal particles and at least one other type of colloidal particle; wherein at least a portion of the plurality of colloidal particles interact with the surfactant to form an associative supporting structure that inhibits sag of the weighting agent.