3807512 is referenced by 56 patents and cites 5 patents.

A percussion-rotary drilling mechanism comprising a rotary drill bit and a percussion drill bit is disclosed with a mud driven turbine wheel for actuating the latter drill bit. Likewise, two reciprocators for receiving rotary motion from the turbine wheel and for generating reciprocal movement in the percussion drill bit portion of the percussion-rotary drilling mechanism comprise an arcuate cam and cam follower drive mechanism and a rotatable eccentrically weighted wheel drive mechanism.

Title
Percussion-rotary drilling mechanism with mud drive turbine
Application Number
05/319,259
Publication Number
3807512
Application Date
December 29, 1972
Publication Date
April 30, 1974
Inventor
Saadeh Fuad T
Pogonowski Ivo C
Agent
Ries C G
Whaley T H
Assignee
Texaco
IPC
E21b 05/00
E21B 06/00
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