Search International and National Patent Collections

1. (WO2017022680) CAPSULE AND VISCOSITY-VARIABLE FLUID

Pub. No.:    WO/2017/022680    International Application No.:    PCT/JP2016/072381
Publication Date: Fri Feb 10 00:59:59 CET 2017 International Filing Date: Sat Jul 30 01:59:59 CEST 2016
IPC: E21B 43/26
Applicants: ADEKA CORPORATION
株式会社ADEKA
Inventors: HOMMA, Masatoshi
本間 正敏
NODA, Kazuyuki
野田 和幸
SHINANO, Hirokatsu
科野 裕克
ISHIKAWA, Yoshihiro
石川 佳寛
SAWAMOTO, Daisuke
沢本 大介
AKIMOTO, Kensaku
秋本 賢作
Title: CAPSULE AND VISCOSITY-VARIABLE FLUID
Abstract:
A capsule comprising a center section 1 and an outer shell section 2 covering the surface of this center section 1. The center section 1 includes a viscosity-reducing material that reduces the viscosity of a fluid used for hydraulic fracturing. The outer shell section 2 includes a styrene-butadiene copolymer that is capable of controlled release of the center section in the fluid and has a glass transition temperature of -20-80°C.