Variable cutting element exposure in a cutting tool

A drill bit comprising:

• a bit body having a bit axis about which the bit body is configured to rotate in a rotational direction;
• a roller cone connected to the bit body and having a cone axis around which the roller cone is configured to rotate, the roller cone having a plurality of cutting inserts positioned in a surface of the roller cone, wherein the plurality of cutting inserts form a rolling cutting profile when rotated around the cone axis;
• and
• a blade having a plurality of fixed cutting elements coupled thereto, wherein the plurality of fixed cutting elements define a fixed cutting profile,
• wherein the rolling cutting profile superimposes on the fixed cutting profile in the rotational direction of the bit body and the rolling cutting profile has an exposure with respect to the fixed cutting profile in a nose region and a shoulder region of the fixed cutting profile such that the plurality of cutting inserts extend past the plurality of fixed cutting elements, wherein the exposure of the rolling cutting profile extends from the nose region of the fixed cutting profile and through the shoulder region of the fixed cutting profile and the exposure is at least partially based on an angular distance between a rotationally aligned pair of a cutting insert of the rolling cutting profile and a fixed cutting element of the fixed cutting profile.

A drill bit comprising:

• a bit body having a bit axis about which the bit body is configured to rotate in a rotational direction;
• a roller cone connected to the bit body and having a cone axis around which the roller cone is configured to rotate, the roller cone having a plurality of cutting inserts positioned in a surface of the roller cone, wherein the plurality of cutting inserts form a rolling cutting profile when rotated around the cone axis;
• a primary blade having a plurality of primary fixed cutting elements coupled thereto, wherein the plurality of primary fixed cutting elements define a primary fixed cutting profile;
• and
• a secondary blade having a plurality of secondary fixed cutting elements coupled thereto, wherein the plurality of secondary fixed cutting elements define a secondary fixed cutting profile,
• wherein the rolling cutting profile superimposes on the primary fixed cutting profile and the secondary fixed cutting profile in the rotational direction of the bit body and the rolling cutting profile has a primary exposure with respect to the primary fixed cutting profile and a secondary exposure with respect to the secondary fixed cutting profile from a nose region and through a shoulder region, and
• wherein the primary exposure is based at least partially on:
• a primary radial distance between a rotationally aligned primary pair of a cutting insert of the rolling cutting profile and a fixed cutting element of the primary fixed cutting profile, and
• a primary angular distance between the rotationally aligned primary pair, and wherein the secondary exposure is based at least partially on:
• a secondary radial distance between a rotationally aligned secondary pair of a cutting insert of the rolling cutting profile and a fixed cutting element of the secondary fixed cutting profile, and
• a secondary angular distance between the rotationally aligned secondary pair.