Abstract: A system for detecting acoustic or vibration signals transmitted along a tubular string, the system can include a tool assembly with a sensor assembly configured to be removably attached to a sub, the sub being connected to the tubular string such that acoustic/vibration signals travel through the sub and the sensor assembly detects the signals, with the sensor assembly including sensors that are configured to contact the sub and detect the signals traveling through the sub.

Abstract: A method that can include coupling one or more loads of the system to a common direct current (DC) bus, measuring a voltage of the common DC bus, estimating a nominal voltage (Vnom) for the common DC bus, and determining a set point (DCSP) for each inverter based on the Vnom, where the inverters control a flow of DC current through the inverters based on the DCSP. A method that can include coupling one or more loads of the system to a common DC bus, measuring a voltage of the common DC bus, detecting a change in the voltage, managing a DCSP for each of inverters, where the inverters are configured to control the DC current flowing through the one or more inverters based on the DCSP, and managing DC current flowing through the inverters coupled between the ESS and the common DC bus.

Abstract: A system for detecting acoustic or vibration signals transmitted along a tubular string, the system can include a tool assembly with a sensor assembly configured to be removably attached to a sub, the sub being connected to the tubular string such that acoustic/vibration signals travel through the sub and the sensor assembly detects the signals, with the sensor assembly including sensors that are configured to contact the sub and detect the signals traveling through the sub.

Abstract: Multiple methods and corresponding apparatuses for efficient and reliable defect diagnosis in components of mechanical systems, are described. According to one aspect, multi-scale enveloping-order spectrogram is used to diagnose, or detect, defects in a moving component of a mechanical system. According to another aspect, defect identification and diagnosis in a motor is performed based on spectral characteristics of motor current envelope. According to yet another aspect, a logic rule model, employing classification of features associated with single- or multi-sensor data, is employed for diagnosis of defects in components of mechanical systems.

Abstract: A device for a drill rig comprising a ruggedized housing and a sensor contained in the ruggedized housing, the sensor adapted to measure at least one condition of a lubrication oil of an equipment on the drill rig. In an embodiment, the ruggedized housing can have a Class I, Division 1 & 2 standard rating according to UL1203 & FM3600(3615).

Abstract: A system for wellbore operations can be adapted to generate an alarm signal upon ingress of a contaminant into a heavy weight lubrication oil of an equipment prior to operational failure of the equipment. In an embodiment, the system can include a sensor. In an embodiment, the sensor can be adapted to sense a viscosity of the heavy weight lubrication oil, a density of the heavy weight lubrication oil, a dielectric of the heavy weight lubrication oil, a temperature of the heavy weight lubrication oil, or a combination thereof.

Abstract: A device for a drill rig comprising a ruggedized housing and a sensor contained in the ruggedized housing, the sensor adapted to measure at least one condition of a lubrication oil of an equipment on the drill rig. In an embodiment, the ruggedized housing can have a Class I, Division 1 & 2 standard rating according to UL1203 & FM3600(3615).

Abstract: Multiple methods and corresponding apparatuses for efficient and reliable defect diagnosis in components of mechanical systems, are described. According to one aspect, multi-scale enveloping-order spectrogram is used to diagnose, or detect, defects in a moving component of a mechanical system. According to another aspect, defect identification and diagnosis in a motor is performed based on spectral characteristics of motor current envelope. According to yet another aspect, a logic rule model, employing classification of features associated with single- or multi-sensor data, is employed for diagnosis of defects in components of mechanical systems.

Abstract: A method of testing and monitoring operational integrity of a drilling rig is described. The method includes operating the drilling rig in a non-drilling mode at a sequence of different phases including an acceleration phase, a constant speed phase, and a decelerating phase, collecting sensor data associated with one or more components of the drilling rig while the drilling is operated in the non-drilling mode at the sequence of different phases, and analyzing the collected sensor data to determine the operational integrity of the drilling rig. The analyzed data, together with previously stored historical data is used to estimate the life expectancy of the rig and monitor, plan, control, or report maintenance activity for the drilling rig, top drive, or any other system.

Abstract: A shoe assembly with a retractable fin assembly that moves between two extreme positions. One of the positions is the retracted position with the fin assembly housed within a longitudinally and transversely extending cavity along the shoe's sole. The other extreme position for the fin assembly being distended outside the sole for maximum propulsion use in a body of water. Resilient support members are mounted to the lateral sides of connecting flexible web portions. A releasable fastening mechanism with a stopper for the smallest support member causes the web portions to stay taut.