Abstract: Systems, tools, and methods include using a milling assembly with a mill having multiple, different types of cutting element inserts. A gage region of the mill includes a first type of cutting element insert, and a shoulder region of the mill includes a second type of cutting element insert. One cutting element insert may include chip-breaking features, and the other may be a shear or gouging cutting element.

Abstract: Systems, tools, and methods include using a milling assembly with a mill having multiple, different types of cutting element inserts. A gage region of the mill includes a first type of cutting element insert, and a shoulder region of the mill includes a second type of cutting element insert. One cutting element insert may include chip-breaking features, and the other may be a shear or gouging cutting element.

Abstract: A rotational tool includes a shaft having a central fluid conduit within a housing, and one or more fluid conduits between the shaft and housing. The one or more fluid conduits are radially offset from the central fluid conduit. The shaft includes a plurality of fluid ports that extend radially and provide fluid communication between the one or more fluid conduits and the central fluid conduit. The fluid ports are longitudinally offset along the shaft to distribute any weakening of the shaft by the introduction of the fluid ports.

Abstract: A downhole tool is disclosed for measuring wellbore geometry. The downhole tool may include a body with a bore extending at least partially therethrough. The body may include a radial recess. An arm may be movably coupled to the body at a first end portion of the arm. The arm may be within the radial recess in a retracted position and be pivotable in a radially-outward direction relative to the body to an expanded position. A measurement device coupled to the body may measure the pivoting motion of the arm. A piston coupled to the body may be movably coupled to a second end portion of the arm, and the piston may respond to changes in hydraulic pressure to pivot the arm between the retracted position and the expanded position.

Abstract: A downhole tool may be operated using a locking clutch. The downhole tool may include an upper downhole motor having a rotor. The downhole tool may also include a lower downhole motor having a shaft. Both the rotor and shaft may rotate relative to the housing. The locking clutch may be coupled to the rotor and the shaft, and may transmit a torque from the rotor to the shaft. The locking clutch may include at least one locking pawl configured to move from an engaged position to a disengaged position when the shaft rotates above a disengagement speed. In the engaged position, the upper downhole motor may provide a torque boost to limit sticking or stall of a drill bit coupled to the downhole tool.

Abstract: Various implementations described herein are directed to a vibration tool, e.g., for use in drilling or other downhole operations. In one implementation, the vibration tool may include a housing having a bore extending therethrough. The vibration tool may also include a piston subassembly positioned inside the bore, where the piston subassembly is configured to oscillate when fluid flow inside the piston subassembly exceeds a predetermined flow rate. The vibration tool may further include a valve mechanism positioned around the piston subassembly, where the valve mechanism is configured to restrict fluid to flow inside the piston subassembly when the valve mechanism is in a closed state and configured to allow the fluid to flow from the piston subassembly to the bore when the valve mechanism is in an open state.

Abstract: Systems, methods and devices for equipping a rotatable drill string with measurement equipment. The system includes a removable carriage unit arranged and designed to be disposed within a bore of a removable section of the rotatable drill string. The removable carriage unit has measurement equipment disposed within a cavity thereof. The method includes disposing measurement equipment in the cavity of the removable carriage unit, coupling the removable carriage unit with a first end portion of the removable section of the rotatable drill string after disposing the measurement equipment in the cavity, and coupling a second end portion of the removable section with a shaft of the rotatable drill string.

Abstract: Structures for radiant dryer units of a printer. A radiant dryer unit includes a reflector element that reflects light waves from a light source back towards a printable medium to dry ink printed on the medium. The reflector element includes a plurality of modular sections. Each modular section includes a base portion having a reflective surface, and includes legs that protrude from an opposing surface of the base portion. The modular sections are affixed to one another so that the reflective surfaces of the modular sections form an aggregate reflective surface that faces toward the light source of the radiant dryer unit.