Learn more

CANGZHOU GREAT DRILL CO LTD

Overview
  • Total Patents
    14
  • GoodIP Patent Rank
    117,779
  • Filing trend
    ⇩ 50.0%
About

CANGZHOU GREAT DRILL CO LTD has a total of 14 patent applications. It decreased the IP activity by 50.0%. Its first patent ever was published in 2014. It filed its patents most often in China. Its main competitors in its focus markets civil engineering and machine tools are SPEX CORPORATE HOLDINGS LTD, SPEX ENGINEERING UK LTD and PACKERS PLUS ENERGY SERV INC.

Patent filings in countries

World map showing CANGZHOU GREAT DRILL CO LTDs patent filings in countries
# Country Total Patents
#1 China 14

Patent filings per year

Chart showing CANGZHOU GREAT DRILL CO LTDs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Zhang Zhankui 14
#2 Yu Zhenzhong 3
#3 Liu Chao 3
#4 Liu Weijing 2
#5 Chu Fanglei 2
#6 Wang Jiantao 1
#7 Wang Wei 1
#8 Wang Xiubin 1
#9 Wang Lei 1
#10 Zhang Guoliang 1

Latest patents

Publication Filing date Title
CN110513047A A kind of self-excitation liquid hammer vibration rock bit
CN109469446A A kind of rock bit with chip removal structure
CN109630024A A kind of Split teeth wheel drill bit
CN109505521A A kind of combined drill of three wings PDC and three cutter teeths
CN109519128A A kind of gear wheel-PDC cutting structure composite drill bit
CN109538128A A kind of shockproof PDC drill bit
CN108625809A A kind of stabilizer for repairing the borehole wall with brill
CN107558929A A kind of special type refuses mud drum PDC drill bit
CN107514235A A kind of PDC drill bit of spiral vibrating nozzles and its composition
CN105756564A Efficient drilling combined coring PDC drill bit
CN105804660A Coring PDC drill bit
CN105756563A Combined PDC (Polycrystalline Diamond Compact) bit
CN104329031A PDC (Polycrystalline Diamond Compact) bit with transverse jet hydraulic structure
CN104174964A Twice hardening method for surface of steel drill bit