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. 22, 2013
Filed:
Dec. 04, 2008
Applicants:
Yannick Peysson, Rueil Malmaison, FR;
David Pasquier, Suresnes, FR;
Inventors:
Yannick Peysson, Rueil Malmaison, FR;
David Pasquier, Suresnes, FR;
Assignees:
IFP, Rueil-Malmaison, FR;
Total S.A., Courbevoie, FR;
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/03 (2006.01);
U.S. Cl.
CPC ...
Abstract
A high-temperature drilling fluid is disclosed based on brine and on a mixture of solids of controlled grain size, with water, dissolved salts and insoluble mineral solids comprising at least in part a weighting material of a grain size such that its D50 ranges between 1 and 25 μm and in part colloids of a grain size such that its D50 ranges between 0.2 and 2 μm. The total volume fraction of the solids ranges between 30 and 50% in relation to the total volume, and the total volume comprises at least 10% by volume of the colloids.