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:
Aug. 11, 2009
Filed:
Sep. 05, 2003
Applicants:
Jeff Miller, Tomball, TX (US);
Jeff Kirsner, Humble, TX (US);
Inventors:
Jeff Miller, Tomball, TX (US);
Jeff Kirsner, Humble, TX (US);
Assignee:
Halliburton Energy Services, Inc., Ducan, OK (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/12 (2006.01); E21B 21/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
An efficient oil based drilling fluid is provided that includes a polymer additive effective at imparting suspension characteristics without the presence of organophilic clays, while also providing filtration control. The fluid is shear thinning and has good fluid rheology over a broad temperature range. A preferred polymer for the additive is substantially linear and comprises mostly hydrophobic monomers and some hydrophilic monomers such as, for example, an emulsion copolymer of 2-ethylhexyl acrylate and acrylic acid.