Through years of unremitting efforts, Rich FRP business division mainly for oil well logging instruments finally overcome th technical difficulties in manufacturing field of oil well logging instruments, which has broken the situation that Chinese petroleum logging manufacturers’ long term dependence on import high temperature FRP insulators. Today, our Richfrp high temperature high pressure composit insulators have been used in various manufacturers of oil well logging instruments in China. Patent number ZL200710018681.4 and ZL200710018680.X (attached patent certificates).
