Inventor
LEFEBVRE HERVE M
FR3 patents
Patents
3 patentsUS4518036AMay 21, 1985
Device for controlling a safety valve disposed below an activation pump in a hydrocarbon production well
PETROLES CIE FRANCAISE13 citations69
US4474234AOct 2, 1984
Safety valve installed below an activation pump in a hydrocarbon production well
PETROLES CIE FRANCAISE16 citations69
US4444251AApr 24, 1984
Combined installation comprising an activation pump and a safety valve disposed below this pump, in a hydrocarbon production well
PETROLES CIE FRANCAISE9 citations69