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. 29, 2014
Filed:
Apr. 02, 2008
Applicants:
Lucilla Del Gaudio, San Donato Milanese, IT;
Thomas Paul Lockhart, Lodi, IT;
Emanuele Vignati, Canegrate, IT;
Inventors:
Lucilla Del Gaudio, San Donato Milanese, IT;
Thomas Paul Lockhart, Lodi, IT;
Emanuele Vignati, Canegrate, IT;
Assignee:
ENI S.p.A., Rome, IT;
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/60 (2006.01); C23F 11/14 (2006.01); E21B 43/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to the use of quaternary polyamines having formula (I) for the recovery of oil from reservoirs formula (I), wherein n>=1 Rrepresents H, CH, CHCH, CHRrepresents HCHOHCH, CH, CHCH═CHRrepresents CH, CHCH, CHRrepresents CH, CHCH═CHwhen Rand Rare allyl group, they can jointly form aliphatic cyclic structures, the ratio between the carbon atoms and nitrogen atoms (C/N) ranges from 2 to 30.