Process for producing a rotary drilling bit

Process for the fabrication of a multi-blade tool

Process for the manufacture of a drill head provided with hard,

Process of drill bit manufacture

Removable drill bit nozzle

Rock bit and method of manufacture

Rock bit assembly method

Rock bit manufacturing method

Rock bit manufacturing method

Rock bit with welded bearing pins

Rock drill bit and method of making same

Rock drilling bit and a method of producing the same

Rolling cone bit with improved wear resistant inserts

Rolling cutter drill bit

Rolling cutters for drill bits, and processes to produce same

Rotary cone drill bit with machined cutting structure and...

Rotary drill bit and method for making same

Rotary drill bit design method

Rotary drill bit for use in drilling holes in subsurface earth f

Rotary drill bit with abrasion and erosion resistant facing