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:
Sep. 18, 2007
Filed:
Sep. 05, 2003
William S. Halliday, Cypress, TX (US);
David Schwertner, The Woodlands, TX (US);
Tao Xiang, Houston, TX (US);
Dennis K. Clapper, Houston, TX (US);
William S. Halliday, Cypress, TX (US);
David Schwertner, The Woodlands, TX (US);
Tao Xiang, Houston, TX (US);
Dennis K. Clapper, Houston, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
An oil-based drilling fluid having a polymer latex capable of providing a deformable latex film on at least a portion of a subterranean sand formation has been discovered to inhibit or control fluid loss and act as a sealing agent when used to drill in sand formations for hydrocarbon recovery operations. Typically, the polymer latex is an aqueous suspension of particles formed by emulsion polymerization that is in turn emulsified into a hydrocarbon base fluid. The polymer particles of suitable size precipitate onto the pores of a subterranean sand formation to at least partial seal the formation with a deformable polymer film.