Assignee
HYDRIL LLC
US9 patents
Top patents by PatentIndex Score
US7478842B2Jan 20, 2009
Coupled connection with an externally supported pin nose seal
HYDRIL LLC36 citations92
US7527304B2May 5, 2009
Floating wedge thread for tubular connection
HYDRIL LLC22 citations91
US7717478B2May 18, 2010
Scalloped wedge threads
HYDRIL LLC15 citations84
US7607333B2Oct 27, 2009
Helical groove for a tubular connection
HYDRIL LLC12 citations84
US7575255B2Aug 18, 2009
Wedge thread with high-angle metal seal
HYDRIL LLC9 citations83
US7686350B2Mar 30, 2010
Mismatched flanks for a wedge thread
HYDRIL LLC7 citations73
US7578039B2Aug 25, 2009
Dope relief method for wedge thread connections
HYDRIL LLC4 citations62
US7500698B2Mar 10, 2009
Pseudo two-step connection
HYDRIL LLC4 citations62
US7497481B2Mar 3, 2009
Treating method and design method for tubular connections
HYDRIL LLC3 citations62