Roller cutter drill bit having a pressure balanced seal assembly
A Standard patent application filed on 13 December 1993 credited to Dolezal, George E
;
Boylan, Turlach P
;
Zahradnik, Anton F
;
Clinkscales, Douglas J
Details
Application number :
57496
Application type :
Standard
Application status :
WITHDRAWN
Under opposition :
No
Proceeding type :
Invention title :
Roller cutter drill bit having a pressure balanced seal assembly
Inventor :
Dolezal, George E
;
Boylan, Turlach P
;
Zahradnik, Anton F
;
Clinkscales, Douglas J