Inventor
ZHANG YONGQING
CN7 patents
⚠️ This page may combine multiple inventors who share the name “ZHANG YONGQING”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNIV CHINA PETROLEUM BEIJING
4 patentsUS9890318B1Feb 13, 2018
Drilling fluid additive composition and water-based drilling fluid suitable for high-pressure plugging
UNIV CHINA PETROLEUM BEIJING15 citations82
US10266744B2Apr 23, 2019
Accelerator used for drilling fluids, water-based drilling fluid and usage thereof
UNIV CHINA PETROLEUM BEIJING0 citations50
US9902890B1Feb 27, 2018
Drilling fluid additive composition suitable for coal-bed gas wells, and water-based drilling fluid and use thereof
UNIV CHINA PETROLEUM BEIJING1 citations50
US10253237B1Apr 9, 2019
Film former used for coal-bed gas well drilling and preparation method thereof, drilling fluid and usage thereof
UNIV CHINA PETROLEUM BEIJING0 citations39