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CHINA COAL SPECIAL DRILLING CO LTD

Overview
  • Total Patents
    16
  • GoodIP Patent Rank
    106,659
About

CHINA COAL SPECIAL DRILLING CO LTD has a total of 16 patent applications. It filed its patents most often in China. Its main competitors in its focus markets civil engineering, thermal processes and transport are MASTER DRILLING SOUTH AFRICA PTY LTD, MASTER SINKERS PTY LTD and ATLAS COPCO ROBBINS INC.

Patent filings in countries

World map showing CHINA COAL SPECIAL DRILLING CO LTDs patent filings in countries
# Country Total Patents
#1 China 16

Focus industries

Top inventors

# Name Total Patents
#1 Wang Zongjin 11
#2 Qi Yanqiu 11
#3 Liu Weijun 11
#4 Yang Guang 11
#5 Feng Jinliang 9
#6 Fu Xinpeng 9
#7 Li Xinli 7
#8 Zhao Weifeng 6
#9 Cao Huachun 6
#10 Yan Zhongjun 6

Latest patents

Publication Filing date Title
CN112196475A Threaded drill rod with air distribution pipe
CN112081593A Construction method for deep water-rich rock shaft by common freezing method
CN112031664A Combined hob and drill bit capable of annularly breaking rock
CN111980711A Novel structure shaft drilling machine
CN111733850A Method for eliminating scratches of liquid supply pipe in lowering and recovering process in freezer
CN111827329A Method for treating calcium chloride crystals in freezer
CN111734322A Large-diameter flange connection drill collar
CN111894472A Novel clay cutter for drilling machine
CN111877993A Novel hook type drag bit
CN111764828A High-efficient hard rock drill bit
CN111894487A Walking type multipurpose large-scale shaft derrick
CN111764856A Jaw type fisher
CN111703450A Rail mounted concrete transport vechicle
CN111691819A Percussion drill suitable for rotary drilling machine
CN111734416A Construction method for deep water-rich rock shaft by common freezing method
CN111663910A Drilling machine drill rod elevator with self-locking function