Provided is a mill bit and well system. The mill bit, in one aspect, includes a tubular having an uphole end and a downhole end. The mill bit, in accordance with this aspect, further includes a first cutting section having one or more first cutting surfaces disposed about the tubular, the first cutting section having a first material removal rate and configured to engage with wellbore casing disposed within a wellbore. The mill bit, in accordance with this disclosure, further includes a second cutting section having one or more second cutting surfaces disposed about the tubular, the second cutting section having a second material removal rate less than the first material removal rate and configured to engage with a whipstock disposed within the wellbore.

Systems and methods presented herein provide for cutting in a borehole or casing. A cutting device can include a first arm having a cutting blade, wherein the cutting blade has side cutting teeth and an axis of rotation that is substantially at a right angle with respect to an axis of the tool body. The cutting device can also include a second arm with a bumper. The first and second arms articulate away from the elongate body in different directions to reduce vibrations while cutting. A control device can automate the cut based on hydraulic pressure measurements. Additionally, the cutting device can also be extended or rotated on a rotary index. The cutting device can rotate around a J slot, in an example.

A mechanical service tool that may include one or more anchors, a cutter, a communication and control system, and one or more sensors, as well as methods for operating the mechanical service tool, are provided. The one or more anchors may extend radially from the mechanical service tool and the cutter may move relative to the mechanical service tool. The cutter may include a drilling bit. The communication and control system may obtain remote commands that control the cutter, the one or more anchors, or both. The one or more sensors may detect operational conditions of the mechanical service tool and may be operatively coupled to the communication and control system.

A mechanical service tool that may include one or more anchors, a cutter, a communication and control system, and one or more sensors, as well as methods for operating the mechanical service tool, are provided. The one or more anchors may extend radially from the mechanical service tool and the cutter may move relative to the mechanical service tool. The cutter may include a drilling bit. The communication and control system may obtain remote commands that control the cutter, the one or more anchors, or both. The one or more sensors may detect operational conditions of the mechanical service tool and may be operatively coupled to the communication and control system.

A mill including a housing having a fluid bypass pathway, a milling feature at a longitudinal end of the housing, a chamber defined by the housing, and a piston disposed in communication with the chamber, the piston defining a fluid passageway initially aligned with the fluid bypass pathway, the piston responsive to pump pressure to move toward the milling feature, the movement misaligning the fluid passageway with the fluid bypass pathway.

The present disclosure relates to the technical field of multilateral well drilling, and proposes an integrated whipstock. The integrated whipstock includes a setting body; a whipstock body, provided on the setting body and having a whipstock face; a window mill, located at one side of the whipstock face; and screws, connecting the whipstock body to the window mill, where the whipstock face is provided with slots, and the window mill is provided with protrusions, and the protrusions are configured to be snapped into the slots. With the above technical solution, the present disclosure solves the technical problems in the related art that the integrated whipstock cannot go downhole smoothly and the screws are not easy to be sheared during the setting process.

The present disclosure relates to the technical field of multilateral well drilling, and proposes an integrated whipstock. The integrated whipstock includes a setting body; a whipstock body, provided on the setting body and having a whipstock face; a window mill, located at one side of the whipstock face; and screws, connecting the whipstock body to the window mill, where the whipstock face is provided with slots, and the window mill is provided with protrusions, and the protrusions are configured to be snapped into the slots. With the above technical solution, the present disclosure solves the technical problems in the related art that the integrated whipstock cannot go downhole smoothly and the screws are not easy to be sheared during the setting process.

A drilling wedge that has, in addition to a normal connector rod, two wings that extend from the sides of the wedge. These wings are angular members that fill much of the space in the larger casing around the wedge. These wings prevent a milling assembly from sliding past the wedge or from moving off to the side, where an exit through the pipe or casing in the wrong place can occur. Instead, the wings help to keep the milling assembly in the proper position on the tray of the wedge to ensure that the milling assembly reaches the proper exit point in the casing. The wings are retracted when the HEW is deployed through the narrower pipe. Once the HEW is properly positioned, the guide cone is extended and the wings are deployed.

A drilling wedge that has, in addition to a normal connector rod, two wings that extend from the sides of the wedge. These wings are angular members that fill much of the space in the larger casing around the wedge. These wings prevent a milling assembly from sliding past the wedge or from moving off to the side, where an exit through the pipe or casing in the wrong place can occur. Instead, the wings help to keep the milling assembly in the proper position on the tray of the wedge to ensure that the milling assembly reaches the proper exit point in the casing. The wings are retracted when the HEW is deployed through the narrower pipe. Once the HEW is properly positioned, the guide cone is extended and the wings are deployed.

A mill including a housing having a fluid bypass pathway, a milling feature at a longitudinal end of the housing, a chamber defined by the housing, and a piston disposed in communication with the chamber, the piston defining a fluid passageway initially aligned with the fluid bypass pathway, the piston responsive to pump pressure to move toward the milling feature, the movement misaligning the fluid passageway with the fluid bypass pathway.