| 摘要 |
The purpose of the present invention is to provide a drilling slurry additive for use in drilling for petroleum or natural gas or in engineering projects or mining, having high heat resistance and mechanical shear resistance such that viscosity is undegraded under conditions of high temperature and high shear; moreover having high pseudoplastic flow properties, thereby affording high fluidity when discharged; and, being naturally derived, also being highly biodegradable, and having low environmental impact. This drilling slurry additive contains cellulose fibers having a number-average fiber diameter of 2-500 nm, a fiber aspect ratio of 50 or above, and a cellulose type I crystal structure. |
