Drilling Systems and Fixed Cutter Bits with Adjustable Depth-of-Cut to Control Torque-on-Bit

A method for managing torque-on-bit while drilling a borehole in an earthen formation, the method comprising:

• (a) engaging the formation with a fixed cutter bit;
• (b) applying weight-on-bit;
• (c) applying a first torque-on-bit to rotate the fixed cutter bit about a central axis;
• (d) increasing the torque-on-bit from the first torque-on-bit to a second torque-on-bit that is greater than the first torque-on-bit;
• and
• (e) extending a depth-of-cut control structure axially from the bit face in response to the increase in the torque-on-bit.

A drill bit for drilling a borehole in an earthen formation, the bit having a central axis and a cutting direction of rotation, the bit comprising:

• a connection member having a first end and a second end opposite the first end, wherein the first end comprises a pin end and the second end comprises a rolling cone bit;
• a fixed cutter bit coupled to the connection member and configured to rotate relative to the connection member about the axis and move axially relative to the connection member, wherein the fixed cutter bit has a bit face;
• and
• a biasing member axially disposed between the fixed cutter bit and the pin end, wherein the biasing member is configured to resist the rotation of the fixed cutter bit relative to the connection member.