Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Adjustable mandrel hanger system

Adjustable mandrel hanger system

US Patent 5638903 · Granted Jun 17, 1997

Estimated economic value: $644,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Tubing annulus plug valve2008
Ball valve seat and support2003
Shearing gate valve2002
Adjustable mandrel hanger for a jackup drilling rig1997
Dynamic metal-to-metal seal1994
Gate valve1994
Preselected casing tensioning system1994
Positive lockdown for metal seal1994
Emergency casing hanger1990
Piezoelectric transducer and components therefor1988