High-temperature resistant, high-strength, and thixotropic gel plugging agent and its preparation method and application

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United States of America Patent

PATENT NO 11421140
APP PUB NO 20210087453A1
SERIAL NO

17111291

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Abstract

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A high-temperature resistant, high-strength, and thixotropic gel plugging agent is composed of 8-20% of acrylamide monomer, 0.05-0.5% of reactive polymer, 0.1-1.0% of organic polymer cross-linker, 3.0-8.0% of resin toughening agent, 1.0-5.0% of flow pattern regulator, 0.01-0.5% of cross-linking regulator by the weight in the water. The gel solution shows a low apparent viscosity during the shear flow and is easy to be pumped into the wellbore and then into the formation leakage layer; after the pumping stops, the gel solution shows rapidly increased viscosity and strong adhesive force, and form a high-strength barrier between the wellbore and the formation, preventing the drilling fluid from further leaking.

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Patent Owner(s)

Patent OwnerAddress
CHINA UNIVERSITY OF PETROLEUMNO 271 NORTH SECOND ROAD DONGYING SHANDONG 257000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bai, Yingrui Qingdao, CN 13 1
Huang, Xianbin Qingdao, CN 17 21
Jin, Jiafeng Qingdao, CN 11 1
Liu, Jingping Qingdao, CN 49 111
Lv, Kaihe Qingdao, CN 21 5
Sun, Jinsheng Qingdao, CN 35 21
Wang, Jintang Qingdao, CN 16 5
Wang, Ren Qingdao, CN 210 2412

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