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:
Sep. 02, 2014
Filed:
Jun. 11, 2010
Jianhui Luo, Beijing, CN;
Huaijiang Zhu, Beijing, CN;
Fengluan Bai, Beijing, CN;
Pingmei Wang, Beijing, CN;
Bin Ding, Beijing, CN;
Jingbo Yang, Beijing, CN;
Qiang Liu, Beijing, CN;
Yuzhang Liu, Beijing, CN;
Jianhui Luo, Beijing, CN;
Huaijiang Zhu, Beijing, CN;
Fengluan Bai, Beijing, CN;
Pingmei Wang, Beijing, CN;
Bin Ding, Beijing, CN;
Jingbo Yang, Beijing, CN;
Qiang Liu, Beijing, CN;
Yuzhang Liu, Beijing, CN;
Petrochina Company Limited, , CN;
Abstract
The present invention relates to a dendritic comb-shaped polymer thickening agent and preparation and application thereof; it is a copolymer obtained by copolymerization of monomer (A) and monomer (B). Monomer (A) is one or more water-soluble unsaturated monomers with olefin chain, and monomer (B) is at least one monomer with the following general structure: wherein R, Ris selected from H or C˜Calkyl group, respectively; R, R, Ris selected from H or C˜Calkyl group, C˜Calkylaryl group, C˜Calkyl ether or C˜Calkyl ester group, respectively; A' is selected from COOor OH. The content of the monomer (A) is 70˜99.99% of the total mass of the monomer (A) and the monomer (B), and the content of monomer (B) is 0.01˜30% of the total mass of the monomer (A) and the monomer (B). The viscosity of the polymer solution with the present polymer is 30% higher than that with common polyacrylamide and it is used in polymer flooding for oil reservoir with permeability lower than 400 mD in oilfields.