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PetroChina has obtained drilling fluid patent, which can resist high temperature above 200 ℃.

Published time： 2023/11/28

According to the announcement of the State Intellectual Property Office, PetroChina (601857) Natural Gas Co., Ltd. has obtained a project called "Preparation Method and Filtration Loss Agent for Drilling Fluid", authorized announcement number CN114591464B, and the application date is December 2020.

The patent abstract shows that the present invention discloses a preparation method for a fluid loss agent for drilling fluid and a fluid loss agent, which belongs to the field of petrochemical industry. The method includes providing preparation raw materials: 60-100 parts of distilled water; 20-40 parts of 2-acrylamido-2-methylpropanesulfonic acid; 20-40 parts of sodium styrene sulfonate; 20-40 parts of liquid paraffin; 2-10 parts of dispersant; 2-10 parts of initiator; 10-20 parts of hydroxyethyl methacrylate; and polymerizing the preparation raw materials to obtain the fluid loss reducer for drilling fluid. The fluid loss agent prepared by the preparation method has good fluid loss performance, dispersion and temperature resistance, can resist high temperatures above 200°C, has good compatibility with drilling fluid, and can effectively improve the safety and drilling speed of drilling, And, non-toxic, harmless, easy to degrade.

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