Abstract: A drill string device configured to operate at a down hole location in a well bore toward a location proximate the surface of an earthen formation includes one or more motors and/or a capacitor bank. The drill string device may be in fluidic communication with a drilling fluid. A first motor of the one or more motors may be operated as part of processing the drilling fluid. A first electrical energy may be provided to the first motor at least as the first motor is operating. A signal to stop the first motor may be received and/or the first motor may be stopped. A second electrical energy may be received from the first motor at least as the first motor is stopping. At least some of the second electrical energy may be directed to the capacitor bank.

Abstract: A rotary pulser is described that includes a shroud assembly, a stator supported by the shroud assembly. The stator has an uphole end, a downhole end spaced from the uphole end, and at least one passage that extends from the uphole end to the downhole end. The rotary pulser includes a rotatable element adjacent to the downhole end of the stator and rotatable to selectively obstruct the at least one passage to generate a pressure pulse in the fluid when the fluid passes through the rotary pulser. The rotary pulser also includes one or more bypass elements that are configured to permit fluid to bypass the stator and the rotatable element when a fluid passes through the drill string and the rotary pulser.

Abstract: A drilling system tool including at least one sensor configured to detect movement of one or more components of the drilling system tool. The sensor is configured to operate at high pressures and temperatures typical in the drilling environment downhole. The sensors are suitable for vibration damping tools, rotary steerable motors systems, downhole motors, drill bits, or other similar downhole drilling equipment that includes a movable component.

Abstract: A drilling system tool including at least one sensor configured to detect movement of one or more components of the drilling system tool. The sensor is configured to operate at high pressures and temperatures typical in the drilling environment downhole. The sensors are suitable for vibration damping tools, rotary steerable motors systems, downhole motors, drill bits, or other similar downhole drilling equipment that includes a movable component.

Abstract: A drill string device configured to operate at a down hole location in a well bore toward a location proximate the surface of an earthen formation includes one or more motors and/or a capacitor bank. The drill string device may be in fluidic communication with a drilling fluid. A first motor of the one or more motors may be operated as part of processing the drilling fluid. A first electrical energy may be provided to the first motor at least as the first motor is operating. A signal to stop the first motor may be received and/or the first motor may be stopped. A second electrical energy may be received from the first motor at least as the first motor is stopping. At least some of the second electrical energy may be directed to the capacitor bank.

Abstract: A drilling system tool including at least one sensor configured to detect movement of one or more components of the drilling system tool. The sensor is configured to operate at high pressures and temperatures typical in the drilling environment downhole. The sensors are suitable for vibration damping tools, rotary steerable motors systems, downhole motors, drill bits, or other similar downhole drilling equipment that includes a movable component.

Abstract: An embodiment includes a downhole tool with first and second modular connectors. The connection modules are configured to aid make-up and assembly and improve stability during use.

Abstract: A system for damping vibration in a drill string can include a magnetorheological fluid valve assembly having a supply of a magnetorheological fluid. A remanent magnetic field is induced in the valve during operation that can be used to provide the magnetic field for operating the valve so as to eliminate the need to energize the coils except temporarily when changing the amount of damping required. The current to be supplied to the coil for inducing a desired magnetic field in the valve is determined based on the limiting hysteresis curve of the valve and the history of the magnetization of the value using a binary search methodology. The history of the magnetization of the valve is expressed as a series of sets of current and it resulting magnetization at which the current experienced a reversal compared to prior values of the current.

Abstract: An embodiment includes a downhole tool with first and second modular connectors. The connection modules are configured to aid make-up and assembly and improve stability during use.

Abstract: A rotary pulser for transmitting information to the surface from down hole in a well by generating pressure pulses encoded to contain information. The pulser includes a rotor having blades that are capable of imparting a varying obstruction to the flow of drilling fluid through stator passages, depending on the circumferential orientation of the rotor, so that rotation of the rotor by a motor generates the encoded pressure pulses. A spring biases the rotor toward the stator so as to reduce the axial gap between the rotor and stator. When the pressure drop across the rotor becomes excessive, such as when increasing drilling fluid flow rate or switching from a high data rate to a low data rate transmission mode, the spring bias is overcome so as to increase the axial gap and reduce the pressure drop across the rotor, thereby automatically reducing the thrust load on the bearings.

Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Abstract: A rotary pulser for transmitting information to the surface from down hole in a well by generating pressure pulses encoded to contain information. The pulser includes a rotor having blades that are capable of imparting a varying obstruction to the flow of drilling fluid through stator passages, depending on the circumferential orientation of the rotor, so that rotation of the rotor by a motor generates the encoded pressure pulses. A spring biases the rotor toward the stator so as to reduce the axial gap between the rotor and stator. When the pressure drop across the rotor becomes excessive, such as when increasing drilling fluid flow rate or switching from a high data rate to a low data rate transmission mode, the spring bias is overcome so as to increase the axial gap and reduce the pressure drop across the rotor, thereby automatically reducing the thrust load on the bearings.

Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Abstract: A system for damping vibration in a drill string can include a magnetorheological fluid valve assembly having a supply of a magnetorheological fluid. A remanent magnetic field is induced in the valve during operation that can be used to provide the magnetic field for operating the valve so as to eliminate the need to energize the coils except temporarily when changing the amount of damping required The current to be supplied to the coil for inducing a desired magnetic field in the valve is determined based on the limiting hysteresis curve of the valve and the history of the magnetization of the value using a binary search methodology. The history of the magnetization of the valve is expressed as a series of sets of current and it resulting magnetization at which the current experienced a reversal compared to prior values of the current.

Abstract: A system for damping vibration in a drill string can include a magnetorheological fluid valve assembly having a supply of a magnetorheological fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil for inducing a magnetic field that alters the resistance of the magnetorheological fluid to flow between the first and second chambers, thereby increasing the damping provided by the valve.

Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

Abstract: A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.