Inventor
GUAN ZHICHUAN
CN8 patents
⚠️ This page may combine multiple inventors who share the name “GUAN ZHICHUAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNIV CHINA PETROLEUM EAST CHINA
7 patentsUS10233695B2Mar 19, 2019
Weight-on-bit self-adjusting drill bit
UNIV CHINA PETROLEUM EAST CHINA4 citations65
US10718176B2Jul 21, 2020
Drilling speed improvement device capable of producing both hydraulic pulse and impact vibration
UNIV CHINA PETROLEUM EAST CHINA1 citations56
US11255127B2Feb 22, 2022
Drill bit with joint function of induced unloading and abrasive jet and drilling method thereof
UNIV CHINA PETROLEUM EAST CHINA0 citations48
US11976554B2May 7, 2024
Bottom-hole impact-rotation stepping combined unloading rock-breaking efficient drilling system and method thereof
UNIV CHINA PETROLEUM EAST CHINA0 citations43
US10927607B2Feb 23, 2021
Drilling speed increasing device driven by downhole motor for generating shock vibration
UNIV CHINA PETROLEUM EAST CHINA0 citations42
US10815743B2Oct 27, 2020
Depressuriz od for downhole annulus drilling fluid
UNIV CHINA PETROLEUM EAST CHINA0 citations36
US10801282B2Oct 13, 2020
Screw drill bypass valve with large displacement diversion function
UNIV CHINA PETROLEUM EAST CHINA0 citations30