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:
Jan. 11, 2011
Filed:
Dec. 12, 2007
Pingmei Wang, Beijing, CN;
Jianhui Luo, Beijing, CN;
Yuzhang Liu, Beijing, CN;
Huaijiang Zhu, Beijing, CN;
Chunming Xiong, Beijing, CN;
Qiang Liu, Beijing, CN;
Ruyi Jiang, Beijing, CN;
Yikun LI, Beijing, CN;
Ying Zhang, Beijing, CN;
Pingmei Wang, Beijing, CN;
Jianhui Luo, Beijing, CN;
Yuzhang Liu, Beijing, CN;
Huaijiang Zhu, Beijing, CN;
Chunming Xiong, Beijing, CN;
Qiang Liu, Beijing, CN;
Ruyi Jiang, Beijing, CN;
Yikun Li, Beijing, CN;
Ying Zhang, Beijing, CN;
Petrochina Company Limited, Beijing, CN;
Abstract
Disclosed are a flexible polymer, particles made from same, and a process for preparing the particles. This flexible polymer is obtained from copolymerizing monomer (A) and monomer (B), wherein monomer (A) is one or more water-insoluble unsaturated diene monomers; monomer (B) is at least one compound with the general formula of wherein R is C-Calkyl, C-Calkyl aryl, C-Calkyl ether or C-Calkyl ester. Monomer (A) is in an amount of 60-90% by weight of the total combined weight of monomer (A) and monomer (B). Monomer (B) is in an amount of 10-40% by weight of the total combined weight of monomer (A) and monomer (B). The flexible polymer particles show excellent flexibility, deformability, elasticity as well as stability. They can be used in oilfields in nearby wellbore profile control and in-depth profile control or as in-depth flooding fluid diverting agents. They can also be applied in water shutoff in high temperature and high salinity production wells; preventing chemical channeling in polymer and ASP (alkali-surfactant-polymer) flooding; temporarily plugging in acidization; huff and puff; and preventing in-depth channeling in steam flooding, loss of circulation control and filtration control, and the like.