Inventor
SIMONS STEPHEN P
US8 patents
Patents
8 patentsUS5851013ADec 22, 1998
Blowout preventer packing element with metallic inserts
HYDRIL CO24 citations91
US5713581AFeb 3, 1998
Fibrous seal for blowout preventer
HYDRIL CO44 citations91
US5542454AAug 6, 1996
Free flow low energy pipe protector
HYDRIL CO29 citations91
US5465759ANov 14, 1995
Variable diameter pipe protector
HYDRIL CO38 citations91
US5906375AMay 25, 1999
Rubber riveting of molded parts
HYDRIL CO10 citations72
US5405467AApr 11, 1995
Rubber riveting of molded parts
HYDRIL CO13 citations72
US5364064ANov 15, 1994
Safety sub with asymmetrical wall elastomeric closure for retaining drilling fluids
HYDRIL CO7 citations72
US5180137AJan 19, 1993
Ram type blowout preventer having improved ram front packings
HYDRIL CO11 citations72