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DONGYING WEIMA PETROLEUM DRILLING TOOLS CO LTD

Overview
  • Total Patents
    19
  • GoodIP Patent Rank
    87,307
  • Filing trend
    ⇩ 100.0%
About

DONGYING WEIMA PETROLEUM DRILLING TOOLS CO LTD has a total of 19 patent applications. It decreased the IP activity by 100.0%. Its first patent ever was published in 2015. It filed its patents most often in China and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets civil engineering, machines and electrical machinery and energy are SPEX CORPORATE HOLDINGS LTD, CANGZHOU GREAT DRILL CO LTD and BBL DOWNHOLE TOOLS LTD.

Patent filings in countries

World map showing DONGYING WEIMA PETROLEUM DRILLING TOOLS CO LTDs patent filings in countries

Patent filings per year

Chart showing DONGYING WEIMA PETROLEUM DRILLING TOOLS CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Liu Yonggang 13
#2 Zhao Xiangkun 13
#3 Zhang Chuanfang 10
#4 Zhang Xiancai 8
#5 Zhang Zhuanfang 2
#6 Yang Yingying 2
#7 Zhao Xiao 1
#8 Hu Jisheng 1
#9 Cheng Chao 1

Latest patents

Publication Filing date Title
CN111441729A Detachable high-sealing double-wall drill rod
CN110385547A A kind of thin diameter oil drilling tools abrasion-proof overlaying welding flux-cored wire
CN107676047A A kind of well shaping feature type drilling rod
CN107740680A A kind of well cleaning function type drilling rod
CN106437551A High-torsion-resistance drill pipe connector with good sealing
CN106437550A Taper thread
CN106382099A Threaded connection structure of air sealing oil casing
CN106437552A High-sealing drill pipe joint
CN105921329A Drill rod anticorrosive coating real-time temperature-control spraying system based on local induction heating
CN105888570A Washout preventing tool connector
CN105888571A Composite-material double-shoulder thread joint
CN105888572A Double-shoulder drilling tool screwed joint
CN105909184A Anti-galling drilling-tool thread joint
CN105909183A Screwed joint of high-torsion-resistance drilling tool
CN106060989A Induction heating power supply method
CN106040554A Coating induction heating method
CN104841580A Finishing coat sprayer
CN104895504A Steel connector and aluminum alloy pipe body threaded connection type light drill rod