Rotary drill bit and method for designing a rotary drill bit for directional and horizontal drilling

A method of designing a multi-profile layer drill bit to provide directional and horizontal drilling, the method comprising:

• placing a plurality of first-layer cutting elements on a plurality of primary blades disposed on exterior portions of a bit body;
• defining a cutting element configuration selected from the group consisting of a front track set configuration and an opposite track set configuration;
• estimating a first weight on bit where the first-layer cutting elements begin to engage a formation during drilling;
• estimating a second weight on bit where a plurality of second-layer cutting elements begin to engage a formation during drilling based on a formation characteristic of a wellbore and a rotation speed of a motor associated with the drill bit, the second weight on bit being greater than the first weight on bit;
• determining an amount of under-exposure of the second-layer cutting elements with respect to the first-layer cutting elements;
• and
• placing the second-layer cutting elements on a plurality of secondary blades according to the defined cutting element configuration and the determined under-exposure in order to prevent the motor from stalling during sliding mode drilling.