Shigemi NAGANAWA

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Fracturing method and depressurizing device used for same
- Patent number 11,326,433
- Issue date May 10, 2022
- National Institute of Advanced Industrial Science and Technology
- Hiroshi Asanuma
- E21 - EARTH DRILLING MINING
Information Patent Grant
Well drilling bit and well drilling method using the same
- Patent number 11,230,890
- Issue date Jan 25, 2022
- The University of Tokyo
- Shigemi Naganawa
- E21 - EARTH DRILLING MINING
Information Patent Grant
Packer
- Patent number 10,801,299
- Issue date Oct 13, 2020
- TEISEKI DRILLING CO., LTD.
- Kuniaki Shimada
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
FRACTURING METHOD AND DEPRESSURIZING DEVICE USED FOR SAME
- Publication number 20210040831
- Publication date Feb 11, 2021
- National Institute of Advanced Industrial Science and Technology
- Hiroshi ASANUMA
- E21 - EARTH DRILLING MINING
Information Patent Application
WELL DRILLING BIT AND WELL DRILLING METHOD USING THE SAME
- Publication number 20190383102
- Publication date Dec 19, 2019
- The University of Tokyo
- Shigemi NAGANAWA
- E21 - EARTH DRILLING MINING
Information Patent Application
PACKER
- Publication number 20180371866
- Publication date Dec 27, 2018
- TEISEKI DRILLING CO., LTD.
- Kuniaki SHIMADA
- E21 - EARTH DRILLING MINING