国家/地区 韩国（3） 中国（2）
IPC部 C（5）
IPC大类 C08（5） C04（2） E01（2）
E04（2）
IPC小类 C08G（5）
IPC C08G018/76（3） C04B014/02（2） C04B020/00（2）
C04B026/16（2） C04B038/00（2） C04B111/00（2）
C04B111/10（2） C08L075/04（2） E01C011/22（2）
发明人 HO M J（2） LIU J（2） SEUNGGYEONG Y（2）
公开年 2022（4）
申请年 2021（5）
专利权人 SBB CO LTD（2）

Pod-type degradable temporary plugging ball useful in temporary plugging treatment of oil and gas wells in fracturing system, comprises degradable outer shell (comprising e.g. polymerized product of glycolide, lactide, polybutylene succinate prepolymer) and inner core.

LI H, ZHANG Y, SHANG L, HUANG B, LIU J, WANG Y, YANG X, JIANG Q

Waterproofing structure useful for repairing cracks of rooftop, underground parking lot, toilet, brick-masonry wall, and floor, comprises e.g. identifying cracks in structure, and perforating injection holes in identified crack site.

KWON S

Water-permeable block comprises e.g. porous structure having honeycomb structure and filler to be filled in empty space of porous structure, includes gravel and bio-urethane-based adhesive containing polymeric methylenediphenyl diisocyanate.

HO M J, SEUNGGYEONG Y

Water-permeable block comprises e.g. gravel and bio-urethane-based adhesive containing first agent comprising polymeric methylenediphenyl diisocyanate and isocyanate monomer and second agent comprising petroleum polyether polyol.

HO M J, SEUNGGYEONG Y

Heat preservation heating rock plate comprises base material rock plate, electrode, heating layer and insulating layer, base material rock plate the heating layer and the insulating layer are connected in turn, and the base rock plate.

LIU J, FAN X, LIU Y