公开(公告)号：US20200063020A1

公开(公告)日：2020-02-27

申请号：US16071081

申请日：2018-02-09

Applicant: Southwest Petroleum University

Inventor： Jincheng MAO ,  Yang ZHANG ,  Jinzhou ZHAO ,  Xiaojiang YANG ,  Heng ZHANG

IPC: C09K8/68 ,  C09K8/88

Abstract: An ultra-high temperature fracturing fluid, including the following components in mass percentages: 0.4 wt %-0.8 wt % of a polymer thickener, 0.015 wt %-0.02 wt % of a non-metallic crosslinking agent, 0.04 wt %-0.06 wt % of a gel breaker and the rest is water. The polymer thickener is obtained by a polymerization of acrylamide, acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, rigid monomer and cationic hydrophobic monomer in a weight ratio of 55-70:15-20:15-20:0.5-3:0.1-1.0, the polymerization temperature is 30-40° C. and the polymerization time is 8-10 hours. The fracturing fluid of the present invention can effectively solve the technical problems that traditional fracturing fluids are easily decomposed at high temperatures and affect performance.

公开(公告)号：US20200062881A1

公开(公告)日：2020-02-27

申请号：US16069167

申请日：2017-05-22

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Yongming LI ,  Qiang REN ,  Jinzhou ZHAO ,  Liehui ZHANG

IPC: C08F283/06 ,  C09K8/584 ,  C09K8/72

Abstract: The present invention provides a surface-active two-tailed hydrophobic associated polymer and a preparation method thereof. The surface-active two-tailed hydrophobic associated polymer is prepared using a micellar free radical copolymerization method including: adding a surfactant sodium lauryl sulfate and a hydrophobic monomer N-phenethyl-N-alkyl (methyl) acrylamide or N-benzyl-N-alkyl (methyl) acrylamide into an aqueous solution containing acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, and surface-active macromonomer polyoxyethylene lauryl ether (methyl) acrylate, wherein the surfactant is used to solubilize the hydrophobic monomer in the formed micelle; adjusting pH to 6-8 with sodium hydroxide, and copolymerizing the hydrophobic monomer and a water-soluble monomer by means of photoinitiation. The properties, such as viscosifying property, temperature resistance, salt resistance and hydrolysis resistance, of the hydrophobic associated polymer can be effectively improved. The preparation method is reliable in principle and simple in operation and has a wide market prospect.