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YANCHANG OIL FIELD CO LTD

Overview
  • Total Patents
    29
  • GoodIP Patent Rank
    61,424
  • Filing trend
    ⇩ 50.0%
About

YANCHANG OIL FIELD CO LTD has a total of 29 patent applications. It decreased the IP activity by 50.0%. Its first patent ever was published in 2013. It filed its patents most often in China. Its main competitors in its focus markets environmental technology, civil engineering and basic materials chemistry are HYDRAFACT LTD, OASEN N V and AQUATECH INT CORP.

Patent filings in countries

World map showing YANCHANG OIL FIELD CO LTDs patent filings in countries
# Country Total Patents
#1 China 29

Patent filings per year

Chart showing YANCHANG OIL FIELD CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Dong Tao 8
#2 Zhao Yajie 8
#3 Zhang Yongfei 6
#4 Wang Yaxiong 6
#5 Gao Jiaxi 6
#6 Tao Hongsheng 6
#7 Gao Wenling 6
#8 Qiao Hongjun 5
#9 Chen Penggang 4
#10 Li Jie 4

Latest patents

Publication Filing date Title
CN112270080A Method for determining reasonable injection-production ratio of ultra-low permeability reservoir
CN112125420A A novel oil-water separator for oil field water treatment
CN111943407A Device and method for treating oil field waste liquid
CN110907313A Full-automatic intelligent hydrodynamic viscosity measuring device and method
CN109915057A A kind of new oil formula polish rod lubricating device
CN110009735A A kind of three-dimensional Trajectory of Horizontal Well design method based on space circular arc curve
CN108645740A The measurement method and device that the row of returning leads after a kind of rock core self-priming fracturing fluid
CN108640334A Three sections of high efficiency composition processing systems of oily wastewater and treatment process
CN108690598A A kind of shale gas water blanket base fracturing fluid and preparation method thereof
CN108392854A A kind of filter with multi-layer filter material
CN107987816A A kind of layer dredge method and selective acidizing additive
CN107576588A A kind of method that water content in crude oil is measured using hydrometer method
CN107663451A A kind of composite multi-functional clean fracturing fluid and preparation method thereof
CN107524430A Casting and dragging free, which is surveyed, adjusts seating nipple
CN107448181A Casting and dragging free tests measurement and adjustment instrument
CN106925002A A kind of sludge drainage system with silt aggregation capability
CN106939783A A kind of clear water flood pattern
CN107083950A Calibration system and its scaling method based on Weighing type single well metering device
CN105936552A Solid corrosion and scale inhibitor for oil field and preparation method thereof
CN106219797A A kind of micro-filtration membrane oilfield sewage treatment device and processing method