Assignee
CHINA NAT OFFSHORE OIL CORP
CN·17 granted patents·11 citations·filing 2013–2023
Top patents by PatentIndex Score
17 records- 0179US10381899B2Sidewall coring structure directly driven by an electric motorCHINA NAT OFFSHORE OIL CORP·Filed 2016·Granted Aug 13, 2019·2 cites·15 claims
- 0269US9404189B2High temperature carbon dioxide corrosion inhibitorCHINA NAT OFFSHORE OIL CORP·Filed 2013·Granted Aug 2, 2016·2 cites·9 claims
- 0367US10295083B2Real-time analysis system for operation of working ship based on ship attitude measurementCHINA NAT OFFSHORE OIL CORP·Filed 2017·Granted May 21, 2019·2 cites·10 claims
- 0466US12012816B2Core detection device of coring instrument and spacer insertion deviceCHINA NAT OFFSHORE OIL CORP·Filed 2023·Granted Jun 18, 2024·0 cites·10 claims
- 0561US9988899B2Rock formation testing method and formation testing instrumentCHINA NAT OFFSHORE OIL CORP·Filed 2013·Granted Jun 5, 2018·2 cites·5 claims
- 0658US11739603B2Core detection device of coring instrumentCHINA NAT OFFSHORE OIL CORP·Filed 2021·Granted Aug 29, 2023·0 cites·16 claims
- 0755US10180064B2System for sampling from formation while drillingCHINA NAT OFFSHORE OIL CORP·Filed 2014·Granted Jan 15, 2019·2 cites·12 claims
- 0854US10018038B2Drilling type sidewall coring apparatusCHINA NAT OFFSHORE OIL CORP·Filed 2014·Granted Jul 10, 2018·1 cites·18 claims
- 0951US10941333B2Heavy oil activator and preparation method and use thereofCHINA NAT OFFSHORE OIL CORP·Filed 2020·Granted Mar 9, 2021·0 cites·13 claims
- 1049US10208736B2High-pressure fluid mixing pump control system and fluid suction control methodCHINA NAT OFFSHORE OIL CORP·Filed 2013·Granted Feb 19, 2019·0 cites·6 claims
- 1148US9982816B2Pup joint for releasing sidewall contact of stratigraphic test device and apparatusCHINA NAT OFFSHORE OIL CORP·Filed 2013·Granted May 29, 2018·0 cites·8 claims
- 1247US9469957B2Pneumatic load-transfer system and method for mating an integrated deck with a pre-installed platform substructureCHINA NAT OFFSHORE OIL CORP·Filed 2014·Granted Oct 18, 2016·0 cites·37 claims
- 1346US9032896B2Grouting and welding combined connection joint applied to a deepwater floating type platform and an offshore installation method thereofCHINA NAT OFFSHORE OIL CORP·Filed 2014·Granted May 19, 2015·0 cites·2 claims
- 1441US12320942B2Sensor module, sensor assembly and acoustic logging toolCHINA NAT OFFSHORE OIL CORP·Filed 2021·Granted Jun 3, 2025·0 cites·18 claims
- 1539US11118733B2Three-dimensional layoutlayout method for splicing vault plates of large LNG storage tankCHINA NAT OFFSHORE OIL CORP·Filed 2017·Granted Sep 14, 2021·0 cites·5 claims
- 1639US11028658B2Horizontal-to-vertical drilling module for deep wellCHINA NAT OFFSHORE OIL CORP·Filed 2019·Granted Jun 8, 2021·0 cites·11 claims
- 1735US10236667B2Wire follow-up protection structure of electric reducerCHINA NAT OFFSHORE OIL CORP·Filed 2017·Granted Mar 19, 2019·0 cites·5 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →