公开(公告)号：US10023782B2

公开(公告)日：2018-07-17

申请号：US15478124

申请日：2017-04-03

Applicant: ISP INVESTMENTS LLC

Inventor： Janice Jianzhao Wang ,  Jun Zheng ,  David Farrar ,  Osama M. Musa

IPC: C09K8/12 ,  C09K8/24 ,  C09K8/88 ,  C09K8/588 ,  C09K8/68 ,  E21B33/13 ,  C09K8/487 ,  E21B7/00 ,  E21B43/16 ,  E21B43/26 ,  C04B24/16 ,  C04B24/26 ,  C08F220/18 ,  C08F220/56 ,  C08F220/58 ,  C04B103/00

Abstract: A salt-tolerant, thermally-stable rheology modifier and, in particular, a rheology modifier for applications in oilfield well-bore fluids. In accordance with one aspect, the rheology modifier comprises a terpolymer of acrylamide, 2-acrylamido-2-methyl-propanesulfonic acid (AMPS) and a long-chain alkyl acrylate wherein the terpolymer is prepared by dispersion polymerization.