YF

Yongren Feng

CO China National Offshore Oil: 3 patents #1 of 16Top 7%
CL China Oilfield Services Limited: 3 patents #1 of 16Top 7%
Overall (2018): #51,205 of 503,207Top 15%
3
Patents 2018

Issued Patents 2018

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
10018038 Drilling type sidewall coring apparatus Zhibin Tian, Tao-Cheng Lu, Liping Liu, Guiqing Hao, Wenquan Zhang +4 more 2018-07-10
9988899 Rock formation testing method and formation testing instrument Minggao Zhou, Yanmin ZHOU, Tao-Cheng Lu, Qiang Yu 2018-06-05
9982816 Pup joint for releasing sidewall contact of stratigraphic test device and apparatus Xiaofei Qin, Wanguang Song, Xiaodong Chu, Lei Wang 2018-05-29