Inventor

SONG WANGUANG

CN2 patents

Patents

2 patents

US10180064B2Jan 15, 2019

System for sampling from formation while drilling

CHINA NAT OFFSHORE OIL CORP2 citations64

US9982816B2May 29, 2018

Pup joint for releasing sidewall contact of stratigraphic test device and apparatus

CHINA NAT OFFSHORE OIL CORP0 citations48