Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Earth drilling lubricated hydraulic shock absorber and method

Earth drilling lubricated hydraulic shock absorber and method

US Patent 4303138 · Granted Dec 1, 1981

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Downhole tool retainer and guide ring2017
Downhole tool retainer and guide ring and methods of fabricating the same2016
Downhole percussion tool2008
Adjustable stuffing boxes for pump rods2001
Self aligning stuffing box and guide bushing assembly1999
Rotary stuffing box and seal assembly1998
Self aligning stuffing box for pumpjack units1997
Self aligning stuffing box for pumpjack units1996
Self aligning stuffing box for pumpjack units1994
Floating sub1989
Roller reamer apparatus1983
Roller reamer apparatus1980