Water-based nano drilling fluid and preparation method thereof

Abstract

The invention discloses a water-based nano drilling fluid, which comprises the following components dispersed in water: basic mud, a polyamine inhibitor accounting for 0.5%-3% of the volume of the drilling fluid, a plugging agent accounting for 0.5%-2% of the mass of the drilling fluid, a deformable blocking polymer accounting for 0.5%-3% of the mass of the drilling fluid, and a lubricant accounting for 0.5%-2% of the volume of the drilling fluid, wherein the basic mud comprises the following components: bentonite accounting for 1.5-4% of the mass of the drilling fluid, sodium carbonate accounting for 0.1-0.3% of the mass of the drilling fluid, sodium hydroxide accounting for 0.1-0.3% of the mass of the drilling fluid, low-viscosity polyanionic cellulose accounting for 0.8-2% of the mass of the drilling fluid, biopolymer xanthan gum accounting for 0.1-0.3% of the mass of the drilling fluid, partially hydrolyzed polyacrylamide accounting for 0.1-0.3% of the mass of the drilling fluid, and barite used for adjusting the specific gravity of the drilling fluid.

Description

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AI Technical Summary

Benefits of technology

This patented technology improves upon existing methods used on conventional drill bits that use oily liquids like diesel or petrol fuel. These new techniques have improved performance over older types but they still pose challenges such as reducing friction when pumping through thick layers of clay without causing issues associated with these materials' ability to absorb liquid from surrounding rocks. Additionally, this innovative solution offers an alternative method for safely drilling underground boreholes while minimizing risks related to accidental explosions at surface locations where there are high levels of moisture. Overall, this technical effect will make better ways to manage and recover hydrocarbon resources more efficiently than current options.

Problems solved by technology

The technical problem addressed in this patents relates to improving the efficiency and effectiveness of conventional oil drills for developing new areas that require deeper boreholes due to increased complexity associated with drilling underground environments like those involving rocks containing hydrogen sulphide (H 2S). Current methods involve adding expensive chemical agents into the drilled hole to improve their properties before drilling can be done again without causing harmful effects on surrounding structures.

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