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:
Dec. 29, 2009
Filed:
Dec. 29, 2000
Heinz Mueller, Monheim, DE;
Jeff Kirsner, Humble, TX (US);
Kimberly Burrows, Kingwood, TX (US);
Halliburton Energy Services, Inc., Duncan, OK (US);
Abstract
A method of reducing the viscosity of invert emulsions and oil-based drilling fluids and well service fluids comprising such emulsions over a broad temperature range is disclosed. The method comprises adding to said invert emulsions of the invention a non-ionic surfactant alone or in combination with a co-thinner having the formula: R″″—(CHO)(CHO)(CHO)—H where R″″ is a saturated or unsaturated, linear or branched, alkyl radical having about 8 to about 24 carbon atoms, n is a number ranging from about 1 to about 10, m is a number ranging from about 0 to about 10, and k is a number ranging from about 0 to about 10. The non-ionic surfactant is a reaction product of ethylene oxide, propylene oxide and/or butylene oxide with Ccarboxylic acids or Ccarboxylic acid derivatives containing at least in position 9/10 and/or 13/14 structural units of general formula (I) where Ris a hydrogen atom or an OH group or a group OR. Ris an alkyl group of about 1 to about 18 carbon atoms, an alkenyl group of about 2 to about 18 carbons atoms, or a group of the formula (II): Ris a hydrogen atom, an alkyl group of about 1 to about 21 carbon atoms or an alkylene group or 2 to 21 carbon atoms.