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:
Apr. 23, 2013
Filed:
Jul. 12, 2011
Cecile Mazard, Massy, FR;
Bertrand Guichard, Villecresnes, FR;
Andrea Valenti, Milan, IT;
Eliokem S.A.S., Villejust, FR;
Abstract
This invention is based upon the finding that certain chlorosulfonated α-olefin copolymers can be beneficially utilized in drilling fluids that are utilized in drilling subterreanean wells. For instance, it has been unexpectedly found that certain chlorosulfonated α-olefin copolymers can be beneficially used as total or partial replacements for organoclays in oil based drilling fluids. The subject invention more specifically reveals a process for drilling a well into a subterranean formation which comprises boring a hole into the earth by rotary drilling, wherein a drilling fluid is circulated down a drilling pipe and returned to the surface of the earth through a pipe hole annulus, wherein the oil-based drilling fluid is comprised of (a) an organic liquid; (b) water; (c) an emulsifier; (d) a weighing material; (e) a fluid loss reducing agent; and (f) a chlorosulfonated α-olefin copolymer which is comprised of repeat units that are derived from ethylene and an α-olefin that contains from 4 to about 20 carbon atoms.