Inventor

FENG YONGREN

CN18 patents

⚠️ This page may combine multiple inventors who share the name “FENG YONGREN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

FENG YONGREN

CHINA NAT OFFSHORE OIL CORP

Sidewall coring structure directly driven by an electric motor

Rock formation testing method and formation testing instrument

System for sampling from formation while drilling

Core detection device of coring instrument and spacer insertion device

Core detection device of coring instrument

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

Drilling type sidewall coring apparatus

Horizontal-to-vertical drilling module for deep well

High-pressure fluid mixing pump control system and fluid suction control method

Wire follow-up protection structure of electric reducer

CHINA OILFIELD SERVICES LTD

Hydraulic power system for downhole device and downhole device

Integrated logging instrument for coring and sampling

Method and system for measuring composition and property of formation fluid

Coring device

Connecting structure for drill collar of logging while drilling instrument and drill collar sub male and female joints

Downhole oil level detection device

Coring and sampling integrated sub and downhole instrument

Sampling-by-pushing system and setting method thereof