Abstract: A rotary steerable system on a bottom-hole assembly, that includes a first actuator row, that includes a first steering actuator, a second steering actuator, and a third steering actuator, and a second actuator row, disposed at a radial offset from the first actuator row, that includes a fourth steering actuator.

Abstract: The present disclosure provides a method and apparatus for whole-process placement and routing incremental optimization, and a computer device.

Abstract: A rotary steerable system on a bottom-hole assembly, that includes a first actuator row, that includes a first steering actuator, a second steering actuator, and a third steering actuator, and a second actuator row, disposed at a radial offset from the first actuator row, that includes a fourth steering actuator.

Abstract: A rotary steerable system (RSS), the RSS including steering collar pockets, actuation cylinders positioned in the steering collar pockets, barrel-shaped pistons positioned in the actuation cylinders and pad actuators attached to the pistons. Each barrel-shaped piston includes a piston hanger; each pad actuator includes a pad housing mounted on the steering collar and a steering pad. Each steering pad is pivotably coupled to one of the pad housings via a first hinge pin and is directly connected via a second hinge pin to the piston hanger of at least one of the pistons. Each barrel-shaped piston is movable within its respective actuation cylinder such that, when extended out of the actuation cylinder, its respective steering pad pivots laterally from the steering collar on the first hinge pin to contact a side of a wellbore, urging the steering collar in a direction opposite the lateral direction.

Abstract: A rotary steerable system (RSS), the RSS including steering collar pockets, actuation cylinders positioned in the steering collar pockets, barrel-shaped pistons positioned in the actuation cylinders and pad actuators attached to the pistons. Each barrel-shaped piston includes a piston hanger; each pad actuator includes a pad housing mounted on the steering collar and a steering pad. Each steering pad is pivotably coupled to one of the pad housings via a first hinge pin and is directly connected via a second hinge pin to the piston hanger of at least one of the pistons. Each barrel-shaped piston is movable within its respective actuation cylinder such that, when extended out of the actuation cylinder, its respective steering pad pivots laterally from the steering collar on the first hinge pin to contact a side of a wellbore, urging the steering collar in a direction opposite the lateral direction.

Abstract: A body of a shear pin can be positioned in a pad stopper of a steering pad of a rotary steerable system. The rotary steerable system can be used to steer a drill in a wellbore. The steering pad can be positioned on the rotary steerable system such that a head of the shear pin is coupled with a lateral pad of the rotary steerable system. The head of the shear pin can deactivate the steering pad by preventing the steering pad from actuating. A fluid pulse can be output in the wellbore to break the shear pin for enabling the steering pad to actuate to cause the rotary steerable system to steer the drill in the wellbore.

Abstract: A rotary steerable drilling system can be positioned in a subterranean formation to steer a drill to form a wellbore in the subterranean formation. An orientation of a steering valve, which is positioned in the rotary steerable drilling system, can be adjusted to cover each channel of one or more channels of a valve seat adjacent the steering valve to deactivate each steering pad of one or more steering pads of the rotary steerable drilling system. The orientation of the steering valve can be adjusted to activate at least one steering pad of the one or more steering pads of the rotary steerable drilling system.

Abstract: A rotary steerable drilling system can be positioned in a subterranean formation to steer a drill to form a wellbore in the subterranean formation. An orientation of a steering valve, which is positioned in the rotary steerable drilling system, can be adjusted to cover each channel of one or more channels of a valve seat adjacent the steering valve to deactivate each steering pad of one or more steering pads of the rotary steerable drilling system. The orientation of the steering valve can be adjusted to activate at least one steering pad of the one or more steering pads of the rotary steerable drilling system.

Abstract: A centralizer for a downhole probe disposed within a pipe, the centralizer having an elongated, primary tubular member with two or more elongated centralizer strip assemblies extending along the primary tubular member. Each strip assembly has inner and outer hollow portions on the wall of the primary tubular member and spaced apart from one another about the circumference of the wall. The outer portion of each strip assembly comprises a flexible outer spring, and the inner portion of the strip assembly comprises a flexible inner spring. The inner portions of the strip assemblies engage the outer diameter of a probe and the outer portions of the strip assemblies engage the inner diameter of a pipe.

Abstract: A timing optimization method and apparatus based on output transition constraints, and a computer device. The method includes upon acquisition of all candidate target cells, performing timing optimization on each candidate target cell. The timing optimization includes: updating the candidate target cell to increase an area of the candidate target cell; performing timing analysis on a path where the updated candidate target cell is located, and acquiring updated timing parameters; determining whether output slew of the updated candidate target cell is less than a preset output slew threshold; if the output slew is less than the preset output slew threshold, ending optimization of the current candidate target cell, otherwise, determining whether a delay boost ratio of the updated candidate target cell is less than a delay boost ratio threshold.

Abstract: A centralizer for a downhole probe disposed within an eccentric pipe, the centralizer having an elongated, primary tubular member with three or more elongated centralizer strip assemblies extending along the primary tubular member. Each strip assembly has inner and outer portions opposing one another on the wall of the primary tubular member and spaced apart from one another about the circumference of the wall. The inner portions of the strip assemblies engage the outer diameter of a probe and are all sized and shaped to have the same inner radial length. The outer portions of the strip assemblies have at least two different outer radial lengths, where one of the outer portions has an outer radial length longer than any other outer radial portions. The outer radial lengths are selected so that the sonde can be coaxially positioned within the eccentric pipe relative to the outer diameter of eccentric pipe.

Abstract: A centralizer for a downhole probe disposed within a pipe, the centralizer having an elongated, primary tubular member with two or more elongated centralizer strip assemblies extending along the primary tubular member. Each strip assembly has inner and outer portions opposing one another on the wall of the primary tubular member and spaced apart from one another about the circumference of the wall. Each inner portion has an inner radial length that is the same for each strip assembly, and each outer portion has an outer radial length that is the same for each strip assembly. The inner portions of the strip assemblies engage the outer diameter of a probe and the outer portions of the strip assemblies engage the inner diameter of a pipe.

Abstract: A body of a shear pin can be positioned in a pad stopper of a steering pad of a rotary steerable system. The rotary steerable system can be used to steer a drill in a wellbore. The steering pad can be positioned on the rotary steerable system such that a head of the shear pin is coupled with a lateral pad of the rotary steerable system. The head of the shear pin can deactivate the steering pad by preventing the steering pad from actuating. A fluid pulse can be output in the wellbore to break the shear pin for enabling the steering pad to actuate to cause the rotary steerable system to steer the drill in the wellbore.

Abstract: A rotary steerable drilling system can be positioned in a subterranean formation to steer a drill to form a wellbore in the subterranean formation. An orientation of a steering valve, which is positioned in the rotary steerable drilling system, can be adjusted to cover each channel of one or more channels of a valve seat adjacent the steering valve to deactivate each steering pad of one or more steering pads of the rotary steerable drilling system. The orientation of the steering valve can be adjusted to activate at least one steering pad of the one or more steering pads of the rotary steerable drilling system.

Abstract: A centralizer for a downhole probe disposed within an eccentric pipe, the centralizer having an elongated, primary tubular member with three or more elongated centralizer strip assemblies extending along the primary tubular member. Each strip assembly has inner and outer portions opposing one another on the wall of the primary tubular member and spaced apart from one another about the circumference of the wall. The inner portions of the strip assemblies engage the outer diameter of a probe and are all sized and shaped to have the same inner radial length. The outer portions of the strip assemblies have at least two different outer radial lengths, where one of the outer portions has an outer radial length longer than any other outer radial portions. The outer radial lengths are selected so that the sonde can be coaxially positioned within the eccentric pipe relative to the outer diameter of eccentric pipe.

Abstract: A centralizer for a downhole probe disposed within a pipe, the centralizer having an elongated, primary tubular member that is polygonal in cross-section such that the wall of the tubular primary tubular member is formed with at least three sides. Each side has two adjacent inwardly extending ridges positioned between two outwardly extending ridges. The inwardly extending ridges each extend inward to an inner diameter to engage the outer diameter of a sonde and the outwardly extending ridges each extend outward to an outer diameter to engage the inner diameter of a pipe.

Abstract: A centralizer for a downhole probe disposed within a pipe, the centralizer having a two spaced apart primary tubular members, each with three or more centralizer strip assemblies spaced circumferentially about the wall of the primary tubular member to form seats at each end of each strip assembly. Each seat is disposed to engage a connecting rod assembly extending between the two spaced apart primary members. Each connecting rod assembly has an inner portion and an outer portion, wherein the inner portions of the connecting rod assemblies engage the outer diameter of a probe and the outer portions of the connecting rod assemblies engage the inner diameter of a pipe.

Abstract: A simultaneous placement and routing based method and apparatus for incremental design optimization, and a computer device.

Abstract: A centralizer for a downhole probe disposed within a pipe, the centralizer having an elongated, primary tubular member with two or more elongated centralizer strip assemblies extending along the primary tubular member. Each strip assembly has inner and outer hollow portions on the wall of the primary tubular member and spaced apart from one another about the circumference of the wall. The outer portion of each strip assembly comprises a flexible outer spring, and the inner portion of the strip assembly comprises a flexible inner spring. The inner portions of the strip assemblies engage the outer diameter of a probe and the outer portions of the strip assemblies engage the inner diameter of a pipe.

Abstract: A centralizer for a downhole probe disposed within a pipe, the centralizer having an elongated, primary tubular member with two or more elongated centralizer strip assemblies extending along the primary tubular member. Each strip assembly has inner and outer portions opposing one another on the wall of the primary tubular member and spaced apart from one another about the circumference of the wall. Each inner portion has an inner radial length that is the same for each strip assembly, and each outer portion has an outer radial length that is the same for each strip assembly. The inner portions of the strip assemblies engage the outer diameter of a probe and the outer portions of the strip assemblies engage the inner diameter of a pipe.