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:
Nov. 11, 2014
Filed:
Jun. 17, 2005
Applicants:
Hans Kristian Kotlar, Stavanger, NO;
Ping Chen, Aberdeen, GB;
Inventors:
Hans Kristian Kotlar, Stavanger, NO;
Ping Chen, Aberdeen, GB;
Assignee:
Statoil Petroleum AS, Stavanger, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/13 (2006.01); C09K 8/508 (2006.01); C09K 8/575 (2006.01);
U.S. Cl.
CPC ...
C09K 8/5083 (2013.01); C09K 8/5753 (2013.01);
Abstract
A method for the treatment of a subterranean formation which contains sand particles, said method comprising contacting said formation with a positively charged polymer capable of increasing the residual matrix strength of said sand particles whereby to reduce or prevent their migration while minimizing any decrease in the permeability of said formation. Polymer materials suitable for use in the method of the invention include polyaminoacids, poly (diallyl ammonium salts) and mixtures thereof.