Abstract: A technique facilitates measurement of forces resulting from a variety of loads, stresses, temperatures, or other sources. In an embodiment, the system comprises a load cell constructed with channels extending into a component which may be subjected to forces. Sensors cooperate with the channels to detect changes in volume of the channels as an indicator of the forces acting on the component. In some applications, the channels enclose a liquid, and the sensors comprise pressure sensors which detect changes in pressure within the liquid due to the volumentric changes in the channels. The system also may comprise a compensation system which compensates for external influences, such as temperatures and hydrostatic pressures.

Abstract: In accordance to an aspect a connection to attach a first downhole tool to a second downhole tool includes an externally threaded member positioned about the first downhole tool and an internally threaded member disposed with the second downhole tool to threadedly mate with the externally threaded member, wherein threadedly connecting the externally threaded member with the internally threaded member interconnects the first downhole tool and the second downhole tool with a defined tensile force and a compressive force at an interface between a hard shoulder of the first downhole tool and a hard shoulder of the second downhole tool.

Abstract: Aspects of the disclosure can relate to a system including a rotatable input shaft and an output shaft to be rotationally driven by the input shaft. The system can also include a coupling that couples the input shaft to the output shaft. The coupling can transmit a predefined torque before slipping. The system can further include an electrical generator coupled with the output shaft. The electrical generator can be electrically connected to a primary electrical load and a secondary electrical load, where the secondary electrical load is adjustable to maintain the torque transmitted by the coupling approximately at the predefined torque after the coupling slips.

Abstract: A technique facilitates drilling of deviated boreholes. The technique employs a drilling system which may be disposed along a drill string. The drilling system may be used to drill a straight section of a borehole along a straight borehole axis and to also selectively drill a deviated section of the borehole. The drilling system comprises a housing, a bit shaft rotatably mounted in the housing, and an actuator which may be selectively actuated to shift the bit shaft to another position with respect to the straight borehole axis. The actuator is selectively shiftable between an unbiased mode and a biased mode. In the unbiased mode, the bit shaft axis is in a first position with respect to the straight borehole axis during drilling of the straight section of borehole. The actuator may be selectively shifted to the biased mode in which the bit shaft axis is shifted off axis relative to the straight borehole axis to enable drilling of the desired deviated section of the borehole.

Abstract: Aspects of the disclosure can relate to a system that includes an input shaft to be driven by a variable fluid flow, and an output shaft coupled with the input shaft to drive a generator. The generator can be an alternator, and the input shaft can be coupled with a turbine to be driven by drilling fluid or another fluid. The system also includes a drive mechanism mechanically coupling the input shaft to the output shaft to drive the generator at a predetermined rotational speed. The system further includes a secondary input mechanically coupled with the drive mechanism, where the secondary input is driven at a variable input speed to drive the generator at the predetermined rotational speed. The drive mechanism can be a full freedom epicycloids gear train, and the secondary input can be a speed correction motor, a mechanical actuator driven by variable fluid flow, and so forth.

Abstract: A technique facilitates measurement of forces resulting from a variety of loads, stresses, temperatures, or other sources. In an embodiment, the system comprises a load cell constructed with channels extending into a component which may be subjected to forces. Sensors cooperate with the channels to detect changes in volume of the channels as an indicator of the forces acting on the component. In some applications, the channels enclose a liquid, and the sensors comprise pressure sensors which detect changes in pressure within the liquid due to the volumentric changes in the channels. The system also may comprise a compensation system which compensates for external influences, such as temperatures and hydrostatic pressures.

Abstract: In accordance to an aspect a connection to attach a first downhole tool to a second downhole tool includes an externally threaded member positioned about the first downhole tool and an internally threaded member disposed with the second downhole tool to threadedly mate with the externally threaded member, wherein threadedly connecting the externally threaded member with the internally threaded member interconnects the first downhole tool and the second downhole tool with a defined tensile force and a compressive force at an interface between a hard shoulder of the first downhole tool and a hard shoulder of the second downhole tool.

Abstract: A technique facilitates drilling of deviated boreholes. The technique employs a drilling system which may be disposed along a drill string. The drilling system may be used to drill a straight section of a borehole along a straight borehole axis and to also selectively drill a deviated section of the borehole. The drilling system comprises a housing, a bit shaft rotatably mounted in the housing, and an actuator which may be selectively actuated to shift the bit shaft to another position with respect to the straight borehole axis. The actuator is selectively shiftable between an unbiased mode and a biased mode. In the unbiased mode, the bit shaft axis is in a first position with respect to the straight borehole axis during drilling of the straight section of borehole. The actuator may be selectively shifted to the biased mode in which the bit shaft axis is shifted off axis relative to the straight borehole axis to enable drilling of the desired deviated section of the borehole.

Abstract: Aspects of the disclosure can relate to a system including a rotatable input shaft and an output shaft to be rotationally driven by the input shaft. The system can also include a coupling that couples the input shaft to the output shaft. The coupling can transmit a predefined torque before slipping. The system can further include an electrical generator coupled with the output shaft. The electrical generator can be electrically connected to a primary electrical load and a secondary electrical load, where the secondary electrical load is adjustable to maintain the torque transmitted by the coupling approximately at the predefined torque after the coupling slips.

Abstract: Aspects of the disclosure can relate to a system that includes an input shaft to be driven by a variable fluid flow, and an output shaft coupled with the input shaft to drive a generator. The generator can be an alternator, and the input shaft can be coupled with a turbine to be driven by drilling fluid or another fluid. The system also includes a drive mechanism mechanically coupling the input shaft to the output shaft to drive the generator at a predetermined rotational speed. The system further includes a secondary input mechanically coupled with the drive mechanism, where the secondary input is driven at a variable input speed to drive the generator at the predetermined rotational speed. The drive mechanism can be a full freedom epicycloids gear train, and the secondary input can be a speed correction motor, a mechanical actuator driven by variable fluid flow, and so forth.

Abstract: Aspects of the disclosure can relate to a system that includes an input shaft to be driven at a nominal uncontrolled rotational speed, and an output shaft coupled with the input shaft to drive a rotary mechanism. The prime mover can be a mud turbine or a motor, and the input shaft can be driven by, for example, drilling fluid. The system also includes a drive mechanism mechanically coupling the input shaft to the output shaft to drive the rotary mechanism at a controlled rotational speed. The system further includes a secondary input mechanically coupled with the drive mechanism, where the secondary input is driven as a control input to drive the rotary mechanism at the controlled rotational speed. The drive mechanism can be a continuously variable transmission and/or a constant speed drive, and the secondary input can be a servo motor.