The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2025
Filed:
Jun. 25, 2024
China University of Petroleum (East China), Qingdao, CN;
Mei-Chun Li, Qingdao, CN;
Ziyan Li, Qingdao, CN;
Jinsheng Sun, Qingdao, CN;
Kaihe Lv, Qingdao, CN;
Jingping Liu, Qingdao, CN;
Yingrui Bai, Qingdao, CN;
Xianbin Huang, Qingdao, CN;
Jintang Wang, Qingdao, CN;
Jiafeng Jin, Qingdao, CN;
Jian Li, Qingdao, CN;
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Qingdao, CN;
Abstract
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.