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DAQING OILFIELD CO LTD

Overview
  • Total Patents
    372
  • GoodIP Patent Rank
    11,446
  • Filing trend
    ⇧ 200.0%
About

DAQING OILFIELD CO LTD has a total of 372 patent applications. It increased the IP activity by 200.0%. Its first patent ever was published in 2001. It filed its patents most often in China and Canada. Its main competitors in its focus markets civil engineering, measurement and basic materials chemistry are CNPC CHUANQING DRILLING ENG CO, CHINA UNITED COALBED METHANE CO LTD and XINJIANG TIANSHAN URANIUM IND CO LTD CNNC.

Patent filings in countries

World map showing DAQING OILFIELD CO LTDs patent filings in countries
# Country Total Patents
#1 China 371
#2 Canada 1

Patent filings per year

Chart showing DAQING OILFIELD CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 He Liu 23
#2 Chuanxu Zhang 14
#3 Li Jun 11
#4 Xingbin Liu 11
#5 Hong Duan 10
#6 Fumin Liang 10
#7 Haicheng Li 10
#8 Xu Dekui 9
#9 Tang Pengfei 9
#10 Wang Fengshan 9

Latest patents

Publication Filing date Title
CN112255027A Tank bottom sediment sampling device
CN112223199A Universal disassembling tool for crank pin of oil pumping unit
CN112269012A Core displacement experiment method for heterogeneous reservoir in different displacement modes
CN112255689A Method for analyzing fidelity velocity of seismic data in multiple wave development area
CN112260139A Tool for disassembling wire connector of spanning rod
CN112270051A Method for optimizing rod column of carbon fiber sucker rod and diagnosing working condition
CN112282682A Underground electronic liquid inlet device for oil-gas well
CN112228015A Intelligent and safe perforator for cleaning pore
CN112274988A Centrifugal pump filter belt cleaning device
CN112279486A Container non-stop desilting and sludge reduction treatment device
CN111677480A Double-acting control valve for casing patching
CN111680457A Numerical simulation method for evaluating plugging effect of plugging agent in fracturing process
CN111577165A Well logging sky pulley linkage
CN111577597A Screw pump direct-drive device
CN111413737A Method for explaining seismic horizon to deposition unit in close well pattern area
CN111558517A Polymerization proppant automatic lifting dry-wet screening device and method
CN111577208A Horizontal gas well is with flexible rotatory plunger drainage instrument
CN111577207A Horizontal gas well is with interior spiral drainage instrument of oil pipe
CN111398258A Quantitative test method and device for polymer in polymer flooding reservoir rock
CN111500082A Synthetic sealing filler special for water injection well test blowout prevention pipe and preparation method thereof