Inventor
ERNST HUGO A
AR5 patents
Patents
5 patentsUS6764108B2Jul 20, 2004
Assembly of hollow torque transmitting sucker rods
SIDERCA SA IND & COM71 citations95
US6991267B2Jan 31, 2006
Assembly of hollow torque transmitting sucker rods and sealing nipple with improved seal and fluid flow
SIDERCA SA IND & COM37 citations89
US6957933B2Oct 25, 2005
Threading insert with cooling channels
SIDERCA SA IND & COM61 citations89
US6997330B2Feb 14, 2006
Apparatus and method for storing or shipping elongated members
SIDERCA SA IND & COM30 citations86
US7431347B2Oct 7, 2008
Hollow sucker rod connection with second torque shoulder
SIDERCA SA IND & COM33 citations85