Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Well drilling tool

Well drilling tool

US Patent 4256189 · Granted Mar 17, 1981

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Hermetic electrical connector2008
Hermetic electrical connector2007
Screen and bypass arrangement for LWD tool turbine1997
Detonation system for detonating explosive charges in well1996
Sonde supported operating system for control of formation production fluid flow1994
Wireline supported perforating gun enabling oriented perforations1993
Shock isolation sub for use with downhole explosive actuated tools1993
Connecting apparatus for logging tools including electrical feedthrough and isol1992
Wireline supported perforating gun enabling oriented perforations1991
High temperature and pressure igniter for downhole percussion coring guns1991
Percussion core gun construction and cable arrangement1990
Locking orientation sub and alignment housing for drill pipe conveyed logging sy1989