Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Tester valve

Tester valve

US Patent 5228516 · Granted Jul 20, 1993

Estimated economic value: $11,366,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Tester valve1994
Drill stem testing with tubing conveyed perforation1994
Compressible liquid mechanism for downhole tool1993
Electrically insulative gap sub assembly for tubular goods1992
Hydraulic shock absorber with nitrogen stabilizer1992
Hydraulic shock absorber1992
Plug release indicator1990
High-pressure fluid flow connector1989
Well bore measurement tool1987
Lock for downhole apparatus1987
Hydraulically set and released bridge plug1987
Well tool with improved valve support structure1986