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公开(公告)号：US12043742B2
公开(公告)日：2024-07-23
申请号：US17822764
申请日：2022-08-26
发明人： Yingrui Bai , Jinsheng Sun , Kaihe Lv , Guancheng Jiang , Rongchao Cheng , Weian Huang , Jintang Wang , Jingping Liu , Xianbin Huang , Jiafeng Jin , Jian Li , Shenglong Shi
IPC分类号： C08L93/04
CPC分类号： C08L93/04 , C08L2205/03
摘要： An oil-soluble thermosensitive resin lost circulation material for protecting a reservoir includes the following raw materials in parts by weight: 40-60 parts of resin matrix, 15-40 parts of modified asphalt, 5-12 parts of viscosity modifier, 2-5 parts of cross-linking agent, 6-15 parts of softening point modifier, and 1-3 parts of dispersant; it further provides a method for preparing the resin lost circulation material; the resin lost circulation material can melt and adhere in different temperature ranges, rapid plugging is realized, and the plugging time is long; the oil-soluble thermosensitive resin lost circulation material can be dissolved by oil flow during oil well production, so that the reservoir permeability is recovered, so as to achieve the purpose of protecting the hydrocarbon reservoir.
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公开(公告)号：US10647902B1
公开(公告)日：2020-05-12
申请号：US16394753
申请日：2019-04-25
发明人： Weian Huang , Jingwen Wang , Ming Lei , Jiaqi Zhang , Gongrang Li , Kaihe Lv , Xiongjun Wu , Zhengsong Qiu
摘要： The present invention discloses temporary plugging agent for drilling fluid and preparation method thereof, and water-based drilling fluid and use thereof. The temporary plugging agent for drilling fluid is obtained by controlling gelatinized starch and a vinyl grafted monomer to have a polymerization reaction in an activator solution in the presence of a cross-linking agent and an initiator; the vinyl grafted monomer comprises acrylic acid, acrylamide, and 2-acrylamide-2-methyl propanesulfonic acid; the gelatinized starch is obtained by adding starch into deionized water to have a gelatinization reaction.
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