Abstract: An earth boring tool includes a tool body and a cutting element secured to the tool body. The tool body has at least one surface defining a cutting element recess where the cutting element is secured within the cutting element recess by a braze material. The cutting element includes a generally cylindrical substrate having at least one outer surface defining a braze recess. The braze material is disposed at an interface between the cutting element and the cutting element recess, including within the braze recess of the generally cylindrical substrate. The tool body does not include a surface defining a feature on the tool body complementary to the braze recess in the generally cylindrical substrate.

Abstract: A sub having an anti-rotation feature for a resource exploration and recovery system includes a tubular having an outer surface and an inner surface defining a flow bore. A sleeve is slideably disposed in the flow bore between a first position and a second position. The sleeve includes an inner surface portion having a taper. A dart including an end portion is disposed in the sleeve. The dart is configured to shift the sleeve between the first position and the second position when exposed to a selected pressure in the flowbore. The end portion includes a tapered section. The tapered section mating with the taper formed in the inner surface to rotatably lock the plug to the inner surface of the sleeve.

Abstract: An earth-boring tool includes a nozzle port extending from an external surface to an internal fluid plenum of a tool body. A fluid inlet sleeve is disposed within the nozzle port of the tool body. The fluid inlet sleeve includes a hollow cylinder having a longitudinal end oriented within the internal fluid plenum. The longitudinal end of the fluid inlet sleeve includes one surface oriented at an angle within a range from greater than 0 degrees to about 90 degrees relative to a plane to which a longitudinal axis of the fluid inlet sleeve is normal.

Abstract: A sub having an anti-rotation feature for a resource exploration and recovery system includes a tubular having an outer surface and an inner surface defining a flow bore. A sleeve is slideably disposed in the flow bore between a first position and a second position. The sleeve includes an inner surface portion having a taper. A dart including an end portion is disposed in the sleeve. The dart is configured to shift the sleeve between the first position and the second position when exposed to a selected pressure in the flowbore. The end portion includes a tapered section. The tapered section mating with the taper formed in the inner surface to rotatably lock the plug to the inner surface of the sleeve.

Abstract: An earth-boring tool may include a tool body and a coupling region configured to couple the earth-boring tool to an adjacent portion of a drill string. The earth-boring tool may also include one or more sensors disposed on the tool body. The earth-boring tool may further include a connector disposed in the coupling region electrically connected to the one or more sensors. The connector may be configured to enable a removable connection from an external device to the one or more sensors.

Abstract: A downhole sensor apparatus may include a structure securing a circuit board. The structure may be configured to be inserted into a recess in a tool on a drill string. The downhole sensor apparatus may include one or more sensors coupled to the circuit board and a cap over the structure. The downhole sensor apparatus may further include a data port electrically coupled to the circuit board and configured to transmit data from the sensors to an external device. The downhole sensor apparatus may include a threaded element configured to thread into complementary threads in the recess in the tool. The downhole sensor apparatus may be configured to operate in an idle condition. The downhole sensor apparatus may compare readings from at least two sensors to threshold downhole conditions and begin normal operation when the readings from the at least two sensors meet or exceed the threshold downhole conditions.

Abstract: An earth-boring tool having at least one cutting element with a multi-friction cutting face provides for the steering of formation cuttings as the cuttings slide across the cutting face. The multi-friction cutting element includes a diamond table bonded to a substrate of superabrasive material. The diamond table has a cutting face formed thereon with a cutting edge extending along a periphery of the cutting face. The cutting face has a first area having an average surface finish roughness less than an average surface finish roughness of a second area of the cutting face, the two areas separated by a boundary having a proximal end proximate a tool crown and a distal end remote from the tool crown.

Abstract: An instrumented cutting element, an earth-boring drilling tool, and related methods are disclosed. The instrumented cutting element may include a substrate base, a diamond table disposed on the substrate base, a sensor disposed within the diamond table, a lead wire coupled to the sensor and disposed within a side trench formed within the substrate base, and a filler material disposed within the side trench. The earth-boring drilling tool may include securing the instrumented cutting element to a blade of a bit body. A related method may include forming the instrumented cutting element and earth-boring drilling tool.

Abstract: A method of manufacturing an earth boring tool body including the following steps: providing a mold, the mold comprising a mold cavity defining an interior surface corresponding to an exterior shape of a tool body and a plurality of blades. Forming at least one barrier sleeve insert and disposing it adjacent the interior surface defining the mold cavity; disposing a first powder in the gap between the insert and the interior surface, disposing a second powder in the mold cavity; disposing an infiltrant material adjacent the powders; and heating the mold, thereby infiltrating the infiltrant material into the powders to form the tool body. The disclosure also includes a mold for manufacturing an earth boring tool, the mold comprising a mold cavity defining interior surfaces corresponding to an exterior shape of the tool body and the plurality of blades. Barrier sleeve inserts and/or containment sleeve inserts may be disposed adjacent interior surfaces the mold cavity.

Abstract: Methods of forming earth-boring tools including one or more instrumented cutting elements may involve placing a cutting element partially within a pocket extending into a body of an earth-boring tool. The cutting element may include a first hole extending partially through a cutting element from a back side of the cutting element toward a cutting face and a second, shorter, wider hole extending partially through the cutting element from the back side toward the cutting face. The second hole may be in fluid communication with the first hole. An extension including a passageway extending through the extension may be located at least partially within the second hole, such that the passageway may be in fluid communication with the first hole. A thermocouple may be inserted through the passageway and into the first hole after affixing the cutting element in the pocket.

Abstract: An earth-boring tool may include a tool body and a coupling region configured to couple the earth-boring tool to an adjacent portion of a drill string. The earth-boring tool may also include one or more sensors disposed on the tool body. The earth-boring tool may further include a connector disposed in the coupling region electrically connected to the one or more sensors. The connector may be configured to enable a removable connection from an external device to the one or more sensors.

Abstract: Methods of forming earth-boring tools including one or more instrumented cutting elements may involve placing a cutting element partially within a pocket extending into a body of an earth-boring tool. The cutting element may include a first hole extending partially through a cutting element from a back side of the cutting element toward a cutting face and a second, shorter, wider hole extending partially through the cutting element from the back side toward the cutting face. The second hole may be in fluid communication with the first hole. An extension including a passageway extending through the extension may be located at least partially within the second hole, such that the passageway may be in fluid communication with the first hole. A thermocouple may be inserted through the passageway and into the first hole after affixing the cutting element in the pocket.

Abstract: Earth-boring tools may have a body, a cutting element attached to the body at a first location, and a formation-engaging structure attached to the body at a second location. The formation-engaging structure may be movable during a drilling operation between a first position and a second position. In the first position, the formation-engaging structure may be located rotationally behind the cutting element at a first radial distance from a longitudinal axis of the body at which the cutting element will at least initially shield the formation-engaging structure from engaging a formation. In the second position, the formation-engaging structure may be located at a different second radial distance from the longitudinal axis of the body at which the formation-engaging structure will engage a formation.

Abstract: Earth-boring tools may have a body, a cutting element attached to the body at a first location, and a formation-engaging structure attached to the body at a second location. The formation-engaging structure may be movable during a drilling operation between a first position and a second position. In the first position, the formation-engaging structure may be located rotationally behind the cutting element at a first radial distance from a longitudinal axis of the body at which the cutting element will at least initially shield the formation-engaging structure from engaging a formation. In the second position, the formation-engaging structure may be located at a different second radial distance from the longitudinal axis of the body at which the formation-engaging structure will engage a formation.

Abstract: An earth-boring tool includes a blade located on a body of the earth-boring tool with a pocket formed in an exposed outer surface of the blade. A formation-engaging structure is affixed within the pocket. The formation-engaging structure includes a distal end, a proximal end and a tapered sidewall therebetween. The distal end of the formation-engaging structure includes a formation-engaging surface. The tapered sidewall engages a tapered inner surface of the pocket. The tapered sidewall of the formation-engaging structure and the tapered inner surface of the pocket are each sized and configured to provide an interference fit between the formation-engaging structure and the pocket of the blade. In additional embodiments, instead of retention by interference fit, the formation-engaging structure is retained to the blade by a threaded fastener threaded within a tapped bore extending through the blade. The threaded fastener is received within a receiving formation of the formation-engaging structure.

Abstract: A cutting element comprises a supporting substrate, and a cutting table attached to the supporting substrate and comprising a substantially planar apex, opposing flat surfaces extending upwardly and inwardly toward the substantially planar apex from locations proximate an interface between the cutting table and the supporting substrate, primary edge surfaces between the substantially planar apex and the opposing flat surfaces and exhibiting one or more of a radiused geometry and a chamfered geometry, opposing semi-conical surfaces intervening between the opposing flat surfaces and extending upwardly and inwardly toward the substantially planar apex from other locations proximate the interface between the cutting table and the supporting substrate, and secondary edge surfaces between the substantially planar apex and the opposing semi-conical surfaces and exhibiting one or more of another radiused geometry and another chamfered geometry.

Abstract: An instrumented cutting element, an earth-boring drilling tool, and related methods are disclosed. The instrumented cutting element may include a substrate base, a diamond table disposed on the substrate base, a sensor disposed within the diamond table, a lead wire coupled to the sensor and disposed within a side trench formed within the substrate base, and a filler material disposed within the side trench. The earth-boring drilling tool may include securing the instrumented cutting element to a blade of a bit body. A related method may include forming the instrumented cutting element and earth-boring drilling tool.

Abstract: A fastening apparatus includes a retaining member comprising a shape memory material configured to transform, responsive to application of a stimulus, from a first solid phase to a second solid phase. The retaining member is disposed within a hole in a body and secured within the hole by phase change which creates an interference fit to secure the retaining member against rotational and axial movement. The hole has a second axial cross-sectional shape. The retaining member has a first axial cross-sectional shape that is preferably either circular or rectangular.

Abstract: Earth-boring tools may have a body, a cutting element attached to the body at a first location, and a formation-engaging structure attached to the body at a second location. The formation-engaging structure may be movable during a drilling operation between a first position and a second position. In the first position, the formation-engaging structure may be located rotationally behind the cutting element at a first radial distance from a longitudinal axis of the body at which the cutting element will at least initially shield the formation-engaging structure from engaging a formation. In the second position, the formation-engaging structure may be located at a different second radial distance from the longitudinal axis of the body at which the formation-engaging structure will engage a formation.

Abstract: Passively adjustable elements for earth-boring tools may include a housing and an element located at least partially within the housing. A piston may be secured to the element, the piston configured to drive extension and retraction of the element relative to the housing. A first flow path may extend through the piston, through a first flow controller supported by the piston to permit fluid to flow at a first rate during retraction of the element. A second flow path may extend at least partially through the piston, through a second flow controller supported by the piston, to permit fluid to flow at a second, faster rate during extension of the element. A biasing element may bias the piston toward an extended position. An outer diameter of the piston may be less than or at least substantially equal to an outer diameter of the element.