公开(公告)号：US20210222057A1

公开(公告)日：2021-07-22

申请号：US17139022

申请日：2020-12-31

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Xiaojiang YANG ,  Difei HAN ,  Jincheng MAO ,  Heng ZHANG ,  Chong LIN ,  Jinhua MAO ,  Jinzhou ZHAO

IPC: C09K8/74 ,  C09K8/60 ,  C09K8/54

Abstract: An emulsifier with high temperature resistance, low viscosity and low corrosiveness, and an emulsified acid system comprising the same. The emulsifier includes a viscoelastic surfactant, which is prepared by a quaterization of fatty acid acyl propyl dimethylamine and a halogenated compound; by a quaterization of a long-chain halogenated hydrocarbon and a tertiary amine compound; or by a reaction of the fatty acid acyl propyl dimethylamine with a linking group synthesized by epichlorohydrin and an alkylamine compound.

公开(公告)号：US20220275269A1

公开(公告)日：2022-09-01

申请号：US17749504

申请日：2022-05-20

Applicant: Southwest Petroleum University ,  Sichuan Green & Top Technology Co., Ltd

Inventor： Jincheng MAO ,  Jinhua MAO ,  Xiaojiang YANG ,  Chong LIN ,  Yang ZHANG ,  An CHEN ,  Sikai DAI

IPC: C09K8/68 ,  C09K8/70 ,  C07F5/02

Abstract: A spherical organic nano boron crosslinker with a PAMAM core and a preparation method thereof, and a gel fracturing fluid. A chemical structure of the spherical organic nano boron crosslinker is shown as follows: In the formula, n=0, 1, 2 or 3; and

公开(公告)号：US20200283676A1

公开(公告)日：2020-09-10

申请号：US16068134

申请日：2018-01-29

Applicant: Southwest Petroleum University

Inventor： Jincheng MAO ,  Jinming FAN ,  Jinzhou ZHAO ,  Xiaojiang YANG

IPC: C09K8/68 ,  C07C233/36 ,  C07C231/12 ,  C07C233/38 ,  C07C235/74

Abstract: The present invention discloses a tri-cationic viscoelastic surfactant, a preparation method and an application thereof, and clean fracturing fluid. According to the present invention, N,N′-dimethyl-1,3-propanediamine and epichlorohydrin are used to prepare an intermediate A, and then the intermediate A and a fatty acid amidopropyl dimethylamine is used to prepare the tri-cationic viscoelastic surfactant. The preparation process is simple. And the clean fracturing fluid including the surfactant have excellent temperature and shear resistance, good suspended sand performance, simple on-site preparation, automatic gel breaking, low damage to formation, low cost and simple preparation process. The clean fracturing fluid including the surfactant also has strong temperature resistance, and the viscosity of the product can be maintained at 42 mPa·s after 80 minutes at 180° C. and 170 s−1, which is higher than the viscosity requirement (>25 mPa·s) of the clean fracturing fluid in on-site construction.

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.