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:
Feb. 26, 2019
Filed:
Feb. 24, 2016
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Peter Leidinger, Kleinniedesheim, DE;
Radoslaw Kierat, Ludwigshafen, DE;
Bernhard Feichtenschlager, Traunstein, DE;
Kristina Brandt, Trostberg, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/13 (2006.01); C09K 8/467 (2006.01); C04B 28/02 (2006.01); C04B 20/10 (2006.01); C09K 8/03 (2006.01); C04B 16/06 (2006.01); C04B 22/00 (2006.01); C04B 28/04 (2006.01); E21B 33/14 (2006.01);
U.S. Cl.
CPC ...
C09K 8/467 (2013.01); C04B 16/0641 (2013.01); C04B 20/1077 (2013.01); C04B 22/0086 (2013.01); C04B 28/02 (2013.01); C04B 28/04 (2013.01); C09K 8/03 (2013.01); E21B 33/14 (2013.01); C09K 2208/08 (2013.01); Y02W 30/97 (2015.05);
Abstract
The present invention relates to the use of modified fibers in oilfield applications, particularly in borehole cementing. Said fibers have crystallization seeds attached to their surfaces thereby improving the mechanical strength and ductility of borehole cements.