US 11,655,412 B2
Spherical organic nano boron crosslinker with PAMAM core and preparation method thereof, and gel fracturing fluid
Jincheng Mao, Chengdu (CN); Jinhua Mao, Chengdu (CN); Xiaojiang Yang, Chengdu (CN); Chong Lin, Chengdu (CN); Yang Zhang, Chengdu (CN); An Chen, Chengdu (CN); and Sikai Dai, Chengdu (CN)
Assigned to Southwest Petroleum University, Chengdu (CN); and Sichuan Green & Top Technology Co., Ltd, Chengdu (CN)
Filed by Southwest Petroleum University, Chengdu (CN); and Sichuan Green & Top Technology Co., Ltd, Chengdu (CN)
Filed on May 20, 2022, as Appl. No. 17/749,504.
Claims priority of application No. 202210048107.8 (CN), filed on Jan. 17, 2022.
Prior Publication US 2022/0275269 A1, Sep. 1, 2022
Int. Cl. C09K 8/68 (2006.01); C07F 5/02 (2006.01); C09K 8/70 (2006.01)
CPC C09K 8/685 (2013.01) [C07F 5/022 (2013.01); C09K 8/70 (2013.01)] 10 Claims
 
1. A spherical organic nano boron crosslinker with a polyamidoamine (PAMAM) core, wherein a chemical structure of the spherical organic nano boron crosslinker is shown as follows:

OG Complex Work Unit Chemistry
wherein n=0, 1, 2 or 3; and

OG Complex Work Unit Chemistry