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DRK OIL TOOLS CO LTD

Overview
  • Total Patents
    11
  • GoodIP Patent Rank
    161,964
About

DRK OIL TOOLS CO LTD has a total of 11 patent applications. Its first patent ever was published in 2015. It filed its patents most often in China. Its main competitors in its focus markets civil engineering and machine tools are LYNDE GERALD D, DEELY CARROLL L and GEJMASH GENNADIJ IOSIFOVICH.

Patent filings in countries

World map showing DRK OIL TOOLS CO LTDs patent filings in countries
# Country Total Patents
#1 China 11

Patent filings per year

Chart showing DRK OIL TOOLS CO LTDs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

# Technology
#1 Earth drilling
#2 Turning

Top inventors

# Name Total Patents
#1 Li Xuesong 11
#2 Li Shaobu 11
#3 Guo Jianlong 10
#4 Yang Jiujian 9
#5 Wu Xiuming 2

Latest patents

Publication Filing date Title
CN112211591A Pressure-testing delay toe end valve and method for establishing passage with stratum
CN106223870A A kind of from dynamic(al) correction centralizer
CN106223869A A kind of centralizer being suitable for multiple sleeve pipe
CN105239961A Switch slide sleeve
CN104806198A Shut-off plug of stage collar for well cementation
CN104806196A Casing floating system for horizontal well
CN104777031A Tensile test tool
CN104763373A Ball throwing type float collar
CN104772475A Machine tool chuck tip
CN104818959A Adjustable classification hoop for well cementation casing running
CN104818958A Automatic grouting type float collar