China University of Petroleum

Ziyan Li

Jinsheng Sun

Jingping Liu

Kaihe Lv

Xianbin Huang

Jintang Wang

Yingrui Bai

Jiafeng Jin

Jian Li

Mei-Chun Li

A phase change microcapsule for drilling fluid cooling and its preparation method and application, belonging to the field of oilfield chemistry technology; the preparation method of the phase change microcapsule of the invention includes the steps as follows: the core materials of NaNOand KNOare dried, heated, melted, cooled and ground to obtain a phase change material mixture; added emulsifier into the linseed oil, then heated and stirred to obtain the oil phase; the phase change material mixture were added into the suspension of cellulose nanofibers (CNFs), then stirred followed by adding ammonium hydroxide to obtain the water phase; mixed the water phase with the oil phase, heated and stirred to form water-in-oil (W/O) emulsion; then added shell prepolymer material (tetraethyl silicate) into the emulsion, after centrifugation, washing and drying, the phase change microcapsule for cooling drilling fluid was obtained.

Phase change microcapsule for drilling fluid cooling and its preparation method and application

Growing community of inventors

Qingdao, China

Ziyan Li