Fluid dispersion for drilling, and mining method for underground resources using same

摘要

A fluid dispersion for drilling, according to the present invention, is characterised in that a hydrolyzable resin material comprising a difficult-to hydrolyze hydrolyzable resin and a hydrolyzable resin having de-esterification properties is dispersed in an aqueous medium. This fluid dispersion for drilling is highly hydrolyzable, uses a low-cost hydrolyzable resin, and is suitable for use as a fluid dispersion for drilling that is used when gathering by means of boring drilling methods such as riserless drilling, rotary drilling and hydraulic fracturing.