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:
Dec. 04, 2007
Filed:
Jun. 06, 2006
Shiyi Yuan, Beijing, CN;
Jianhui Luo, Beijing, CN;
Ruoying Pu, Beijing, CN;
Yuzhang Liu, Beijing, CN;
Huaijiang Zhu, Beijing, CN;
Pingmei Wang, Beijing, CN;
Chunming Xiong, Beijing, CN;
Ying Zhang, Beijing, CN;
Fengluan Bai, Beijing, CN;
Jingbo Yang, Beijing, CN;
Shiyi Yuan, Beijing, CN;
Jianhui Luo, Beijing, CN;
Ruoying Pu, Beijing, CN;
Yuzhang Liu, Beijing, CN;
Huaijiang Zhu, Beijing, CN;
Pingmei Wang, Beijing, CN;
Chunming Xiong, Beijing, CN;
Ying Zhang, Beijing, CN;
Fengluan Bai, Beijing, CN;
Jingbo Yang, Beijing, CN;
Petrochina Company Limited, Beijing, CN;
Abstract
A braided comb-shaped salt-resistant thickening agent for tertiary oil extraction from class I oil reservoir is disclosed. The agent is polymerized with monomer (A) and monomer (B), and monomer (A) is one or multiple water soluble non-saturated compound(s) with alkenyl chain, while monomer (B) is at least one compound with the following formula: Monomer (A) is preferably acrylamide, ethenyl pyrrolidone, 2-acrylamide-2 methylpropane sulfonic acid, and acrylic acid or the mixture of the above said compounds, and in the formula of monomer (B), A is COOH, OH, SOH, Rand Rare H or C-Calkyl, Rand Rrepresent C-Calkyl, C-Calkylaryl, C-Calkyl ether or C-Calkyl ester group. This thickening agent has fine water solubility and good property to thicken water medium. The polymer's molecules present a braided comb-shaped structure in water solution with fine salt-resistant performances. The agent can be used together with the water extracted from oil mines to compound the polymer for tertiary oil extraction, and the polymer solution's viscosity can reach the level of the comb-shaped salt-resistant polymer solution applied in class I oil reservoir, so it can promote the economic benefits of tertiary oil extraction from class II oil reservoir and expand the application scope.