A drill bit having a rotatable ball bit includes a first bit head and a second bit head, a first set of cutters on the first bit head, and a second set of cutters on the second bit head. The rotatable ball bit is configured to rotate between a first position and a second position, wherein the first bit head is distal to the second bit head in the first position, and wherein the second bit head is distal to the first bit head in the second position. A method of operating a rotatable ball bit includes orienting the rotatable ball bit in a first position, wherein a first bit head is oriented distally, rotating the rotatable ball bit about a longitudinal axis, orienting the rotatable ball bit in a second position, wherein a second bit head is oriented distally, and rotating the rotatable ball bit about the longitudinal axis.

A drill bit is disclosed. The drill bit includes a bit body and a plurality of blades on the bit body. A cutting element is located on one of the plurality of blades and is communicatively coupled to a depth of cut controller (DOCC) located on the one of the plurality of blades. The DOCC is coupled to the cutting element such that the DOCC moves in response to an external force on the cutting element.

A drill bit is disclosed. The drill bit includes a bit body and a plurality of blades on the bit body. A cutting element is located on one of the plurality of blades and is communicatively coupled to a depth of cut controller (DOCC) located on the one of the plurality of blades. The DOCC is coupled to the cutting element such that the DOCC moves in response to an external force on the cutting element.

A horizontal directional drilling sonde housing has a cavity for receiving a sonde. Signal channels extend from the cavity to an exterior of the housing. A polymer lines at least part of the cavity and fills the signal channels. The drilling tool has a bit body and a drilling body. The two bodies have respective lateral surfaces which engage each other to prevent the transverse movement of the drilling body relative to the bit body during operations. The drill bit has a forward extending drill tooth, which drill tooth is removable from a bore. A spacer is located in the bore between the bottom end of the bore and the tooth. The drilling bit has buttons located on the side in a spiral configuration about a longitudinal axis of the bit.

A horizontal directional drilling sonde housing has a cavity for receiving a sonde. Signal channels extend from the cavity to an exterior of the housing. A polymer lines at least part of the cavity and fills the signal channels. The drilling tool has a bit body and a drilling body. The two bodies have respective lateral surfaces which engage each other to prevent the transverse movement of the drilling body relative to the bit body during operations. The drill bit has a forward extending drill tooth, which drill tooth is removable from a bore. A spacer is located in the bore between the bottom end of the bore and the tooth. The drilling bit has buttons located on the side in a spiral configuration about a longitudinal axis of the bit.

A cutting element for an earth-boring tool includes a body having a longitudinal axis, a generally planar volume of hard material carried by the body, and a sensor affixed to the body. The sensor may be configured to sense at least one of stress and strain. An earth-boring tool includes a cutting element disposed at least partially within a pocket of a body. Methods of forming cutting elements comprise securing a generally planar volume of hard material to a body, attaching a sensor to the body, and configuring the sensor. Methods of forming earth-boring tools comprise forming a cutting element and securing the cutting element within a recess in a body of the earth-boring tool. Methods of forming wellbores comprise rotating an earth-boring tool comprising a cutting element and measuring at least one of stress and strain.

A cutting element for an earth-boring tool includes a body having a longitudinal axis, a generally planar volume of hard material carried by the body, and a sensor affixed to the body. The sensor may be configured to sense at least one of stress and strain. An earth-boring tool includes a cutting element disposed at least partially within a pocket of a body. Methods of forming cutting elements comprise securing a generally planar volume of hard material to a body, attaching a sensor to the body, and configuring the sensor. Methods of forming earth-boring tools comprise forming a cutting element and securing the cutting element within a recess in a body of the earth-boring tool. Methods of forming wellbores comprise rotating an earth-boring tool comprising a cutting element and measuring at least one of stress and strain.

A cutting element for an earth-boring tool includes a substrate and volume of superabrasive material positioned on the substrate. The volume of superabrasive material includes a cutting face having at least one recess extending into the volume of superabrasive material and/or at least one protrusion extending outward from the volume of superabrasive material. The volume of superabrasive material includes a first chamfer surface having a peripheral edge and a radially innermost edge. The peripheral edge of the first chamfer surface is located proximate a cutting edge of the volume of superabrasive material. A radial width of the first chamfer surface is between about 0.002 inch and about 0.045 inch. The volume of superabrasive material also includes a second chamfer surface having a peripheral edge and a radially innermost edge. The peripheral edge of the second chamfer surface is located adjacent the radially innermost edge of the first chamfer surface.

A cutter profile for a fixed cutter drill bit having a drill bit axis. The cutter profile includes a nose portion radially offset from the drill bit axis and surrounding the drill bit axis, a first cone-shaped depression centered on the drill bit axis and extending radially to the nose portion, and a second cone-shaped depression centered on the drill bit axis and extending radially toward the nose portion. A second depression diameter is smaller than a first depression diameter. A second depression maximum depth is greater than a first depression maximum depth. A second depression included angle is smaller than a first depression included angle.

A cutter profile for a fixed cutter drill bit having a drill bit axis. The cutter profile includes a nose portion radially offset from the drill bit axis and surrounding the drill bit axis, a first cone-shaped depression centered on the drill bit axis and extending radially to the nose portion, and a second cone-shaped depression centered on the drill bit axis and extending radially toward the nose portion. A second depression diameter is smaller than a first depression diameter. A second depression maximum depth is greater than a first depression maximum depth. A second depression included angle is smaller than a first depression included angle.