▎ 摘　　要

NOVELTY - Temperature-responsive cementing slurry comprises 63-67 wt.% oil well cement, 3.3-9.4 wt.% bidirectional intelligent temperature control material, 27.3-29.4 wt.% mixing water, 0.1 wt.% dispersant, and 0.2 wt.% fluid loss agent. USE - Used as temperature-responsive cementing slurry. ADVANTAGE - The two-way intelligent temperature control material has two-way and intelligent temperature control, which realizes the reversible, timely and efficient control of the hydration temperature rise of cement slurry in deep water natural gas hydrate layers. During the acceleration period of cement hydration, the phase change heat absorption of the core material of the two-way intelligent temperature control material reduces the hydration temperature rise of the cement slurry to avoid thermal decomposition of metastable hydrates. During the deceleration period, the temperature of the cement slurry is reduced through the phase change exotherm decreases rate, and promotes the development of low-temperature mechanical properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing temperature-responsive cementing slurry, comprising (i) preparing a two-way intelligent temperature control material: preparing an organic resin prepolymer, which is a prepolymerized product of urea, melamine and formaldehyde; taking 10-15 wt.% organic resin prepolymer, 0.1-0.5 wt.% mechanical enhancer, 25-30 wt.% phase change energy storage material, 0.05-0.1 wt.% thermal conductivity enhancer, 45-55 wt.% deionized water, 3-4.5 wt.% dispersant, 1.5-3 wt.% emulsifier, 0.5-1 wt.% acid-base regulator and 1-3 wt.% curing agent; ultrasonically dispersing the mechanical enhancer in the organic resin prepolymer; adding thermal conductivity enhancer into deionized water, stirring and ultrasonically dispersing, then adding dispersant and emulsifier, stirring evenly, adding phase change energy storage material, emulsifying with emulsifier to obtain thermal conductivity enhanced type phase change energy storage core material emulsion; placing the thermally enhanced phase change energy storage core material emulsion in a four-necked reaction flask for a constant temperature water bath reaction at 40-60 degrees C, dropwise adding mechanically enhanced organic resin prepolymer To the thermally enhanced phase change energy storage core material emulsion, within 40-60 minutes; adding the acid-base regulator to adjust the pH of the reaction system to 4, and the dripping time is 20-40 minutes; reacting for 60 minutes, increasing the temperature of the water bath to 60-80 degrees C, adding the curing agent dropwise for 4-6 minutes, suction filtering, washing and drying to obtain two-way intelligent temperature control material; and (ii) preparing temperature-responsive cement slurry: taking 63-67% oil well cement, 3.3-9.4% two-way intelligent temperature control materials, 27.3-29.4% mixing water, 0.1% dispersant and 0.2% filtrate reducer; mixing the oil well cement, dispersant and fluid loss reducer, adding the mixing water into the mixing cup and placing it on the base of the mixing container; starting the motor and insulating at 4000 revolutions per minute plus minus 200 revolutions per minute within 15 seconds, evenly adding the oil well cement, dispersant and fluid loss additive mixed materials into the mixing cup, and continuing to stir at 12000 revolutions per minute plus minus 200 revolutions per minute for 35 plus minus 1 seconds; adjusting the motor and insulating at 4000 revolutions per minute at a speed of plus minus 200 revolutions per minute, evenly adding the two-way intelligent temperature control material into the mixing cup within 15 seconds, and continuing to stir for 35 plus minus 1 seconds at this speed.