Patent ID: 7673707
Filing Date: 2010-03-09
Classification: E21B

Abstract:
1. An apparatus for drilling a well bore with a down hole motor, with the down hole motor having a power shaft for imparting rotational movement in response to a fluid flow, the apparatus comprising: a driver operatively connected to the power shaft, said driver having a tubular body, and wherein an outer portion of said tubular body contains a plurality of cogs and an internal bore for the fluid flow; a first bit having a first end, and wherein said first end is connected to said driver so that rotational movement of said driver is imparted to the first bit; a sleeve disposed about a portion of said power shaft, said sleeve having a plurality of openings therein for placement of a plurality of pinions, said pinions having a pin disposed there through, and wherein said sleeve has a radial shoulder for attaching said plurality of pins; a housing having a first end, and wherein said first end has a second bit formed thereon, and wherein said housing has an internal portion that contains internal cogs, and wherein said internal cogs engage said pinions so that as said driver rotates in a first direction, rotation is imparted to said pinions which in turn imparts a counter rotation to said second bit; a nozzle disposed within said tubular body and communicating said internal bore of said tubular body to the outer portion of said tubular body, and wherein said nozzle is oriented to deliver the fluid flow to said second bit.