Abstract: A method for evaluating a downhole working condition of a PDC bit includes: performing an indoor test, including performing a drilling test in different full-sized cores by using the PDC bit with different degrees of abrasion and balling under condition of given WOB and rotational speed, to acquire change characteristics of a WOB, a rotational speed, a torque, a ROP and a bit vibration of the PDC bit in different time domains; improving and perfecting an existing prediction model and evaluation method for the downhole working condition through data obtained by the test to obtain the method; reading parameters of the WOB, the rotational speed, the torque and the ROP in real time during drilling; determining the downhole working condition of the PDC bit by using the method in the improving and perfecting.

Abstract: An abnormality diagnosis device includes: a data acquirer to acquire a current waveform and a driving frequency of an electric motor; a storage which stores a combination of a current value of the current waveform and the driving frequency at an identical time by the data acquirer; a data determiner to determine whether or not a current value of the current waveform and the driving frequency as a diagnosis target at an identical time by the data acquisition match the combination stored in the storage; an analyzer to perform frequency analysis for the current waveform determined to be matched by the data determiner, to extract sideband waves, and calculate a spectrum intensity of the sideband waves; and an abnormality diagnosis processor to make a diagnosis that abnormality has occurred, when the spectrum intensity of the sideband waves is equal to or greater than a threshold.

Abstract: A demarcating system is discussed that includes a control system, a wire loop arrangeable by a user to indicate to an object path as part of a boundary of an area: a signal generator controlled by the control system, wherein voltage signals applied by the signal generator to the loop are controlled by the control system; and current sensing circuitry that senses current signals present within the loop wherein processors of the control system analyse such current signals and—operate in a calibration mode to: cause the signal generator to apply to the loop a series of test voltage waveforms that generate corresponding current waveforms within the loop; and analyse the corresponding current waveforms to determine an operating voltage waveform that, when applied to the loop, generates a corresponding operating current waveform with substantially the same shape as a predetermined current waveform.

Abstract: A tilt detecting unit has a tilt sensor and is rotatably supported by an inner frame through a second shaft orthogonal to a first shaft, a first encoder is provided on the first shaft, a second encoder is provided on the second shaft, motors are provided on the respective shafts, an arithmetic processing module drives the respective motors so that the tilt sensor detects the horizontality based on a signal issued by the tilt sensor, calculates a tilt of the outer frame based on the outputs from the first and second encoders when the tilt sensor detects the horizontality, reverses the tilt detecting unit 180° at least once based on the outputs from the respective encoders in a stationary state of the tilt detecting device, and performs the calibration of the tilt sensor based on the detection signals output from the tilt sensor before and after the reversal.

Abstract: A method for determining a predicted state of health of an electrical energy storage unit in a machine includes providing a data-based or hybrid state of health model, the data-based state of health model is trained, depending on operating variables of the electrical energy storage unit and/or operating features derived from the operating variables, to indicate a state of health and to indicate a model uncertainty of the indicated state of health, ascertaining a state of health characteristic and the associated model uncertainty of the energy storage unit based on the operating variables using the state of health model, and generating at least one random constructed state of health characteristic candidate that corresponds to constructed state of health characteristics within characteristic of confidence intervals, the characteristic of confidence intervals defined by the model uncertainties of the states of health of the ascertained state of health characteristic.

Abstract: Noise in drilling operation measurements can be eliminated or reduced using machine learning. For example, a system described herein can receive one or more measured signals in a logging-while-drilling process for drilling a wellbore. The system can determine a coupling factor for noise in the one or more measured signals. The system can generate a corrected signal by removing the noise multiplied by the coupling factor from the one or more measured signals. The system can output the corrected signal for use in drilling operations in the wellbore.

Abstract: A microelectromechanical gyroscope which comprises one or more Coriolis masses driven by a drive transducer and a force-feedback system. The force-feedback circuit comprises first and second sideband modulators and the self-test circuit comprises first and second sideband demodulators.

Abstract: A battery pack for an information handling system includes a battery cell configured to provide current to the information handling system, and a battery management unit including an output to the information handling system. The output provides a maximum continuous current (MCC) indication and a peak power (PP) indication. The battery management unit determines an amount of current that the battery cell provides to the information handling system and determines an optimum MCC value that the battery cell can provide to the information handling system. The battery management unit further provides a first value on the PP indication, the first value being greater than the optimum MCC value, sums the amount of current provided to the information handling system that is in excess of the optimum MCC value, determines that the sum is greater than a threshold, and provides a second value on the PP indication, the second value being less than the optimum MCC value.

Abstract: Extending the spatial coverage of a reference pressure network. Particular embodiments described herein include machines that initially determine that an estimated position of a mobile device resides outside a coverage area of a network of reference pressure sensors. Reference-level pressures corresponding to reference pressure sensors of the network are determined using measurements of pressure from the network of reference pressure sensors. A pressure pattern for a region that includes the estimated position and an area not included in the coverage area of the network is determined using reference-level pressures that were not determined using measurements of pressure from the network of reference pressure sensors. The reference-level pressures corresponding to reference pressure sensors of the network and the pressure pattern are used to determine a reference-level pressure value for use in calibrating a pressure sensor of the mobile device or for use in estimating an altitude of the mobile device.

Abstract: Systems and methods for determining leaks in a water distribution system using water devices within buildings. Pressure readings over time from two or more water devices. Egress readings and possibly other noise are removed from the pressure readings to isolate signals for leaks from outside of the buildings. Using the isolated signals, the location of the leak in the water distribution system can be approximated.

Abstract: A method for offset well analysis includes receiving offset well data collected from an offset well, the offset well data including data representing a trajectory of an offset well, receiving subject well data comprising a trajectory of at least a portion of a subject well, partitioning the trajectory of the offset well into a plurality of offset well segments, partitioning the trajectory of the subject well into a plurality of subject well segments, determining a distance between at least some of the plurality of offset well segments and at least some of the plurality of subject well segments, selecting the offset well based in part on the distance, and performing an offset well analysis using the offset well and the subject well.

Abstract: An insulation resistance measurement apparatus includes a first resistance unit having one end connected to an anode of a battery and the other end connected ground, and variably having a first resistance value or a second resistance value greater than the first resistance value; a second resistance unit having one end connected to a cathode of the battery and the other end connected to ground, and variably having a third resistance value or a fourth resistance value greater than the third resistance value; a voltage measurement unit configured to measure a voltage across the first or second resistance unit; and an insulation resistance calculation unit configured to calculate a first insulation resistance value between the anode of the battery and ground and a second insulation resistance value between the cathode of the battery and ground by using the first to fourth resistance values and the measured voltage.

Abstract: A system can receive data that can indicate a flow rate with respect to perforations in a reference wellbore. The data can be received from a fiber optic cable in the reference wellbore in a geographic area of interest. The system can determine a uniformity index, which can indicate a uniformity of flow with respect to the perforations, based on the data. The system can generate a pressure-based model by training a model using the uniformity index for applying the pressure-based model to a target wellbore in the geographic area of interest to determine controls to rate and proppant with respect to the target wellbore.

Abstract: A method may include obtaining power production and fuel consumption data of a first piece of rig equipment through a flow meter, where the rig equipment includes a plurality of pieces of equipment. The method further includes feeding the power production and fuel consumption data of the first piece of rig equipment into a real-time monitoring system of the rig via the flow meter. The method further includes determining an energy efficiency, based on real-time performance, of the first piece of rig equipment using a consumption efficiency model. The method further includes comparing the energy efficiency of the first piece of rig equipment against continuously updated historical data of the first piece of rig equipment by a real-time database monitoring system. The method further includes identifying deficiencies of the first piece of rig equipment in real-time and determining maintenance or replacement of the first piece of rig equipment.

Abstract: A method for well integrity assessment using machine-trained prediction of physical characteristics related to well integrity across a depth interval of a cased wellbore having one or more casing strings. The method includes collecting scattered X-ray signals from a plurality of X-ray detectors arranged within a well logging tool, learning trained weights to predict wellbore characteristics from the scattered X-ray signals, collecting further scattered X-ray signals from the X-ray detectors, using the trained weights to quantitatively predict the wellbore characteristics from the further X-ray signals, and using the predicted wellbore characteristics to assess well integrity.

Abstract: A system for detecting changes in an electronic component and a method for operating a data processing system for finding events that predict an electronic component's failure are disclosed. The system includes an input port that receives a data stream that includes an ordered sequence of data values generated by the electronic component. A controller identifies a segment of the data stream (EDS), transforms the EDS to a CSV, and compares the CSV to a plurality of reference signature vectors (RSVs) to determine if the CSV is similar to any of the RSVs. Information identifying a new CSV is stored in an RSV database if the new CSV is similar to one of the RSVs, and a new RSV is created if the new CSV is not similar to any of the RSVs in said RSV database. A predictor RSV that occurs as the electronic component ages is identified.

Abstract: Based on a reception signal of a reflected wave of pulsed undulation repeatedly transmitted into a space, a Doppler spectrum derived from the reception signal, and a topographic-echo-removed spectrum resulting from removal of a topographic echo from the Doppler spectrum, a first weather echo region is found by using a weather parameter among weather parameters that is different in behavior between a weather echo and the topographic echo, and a second weather echo region is found by using a weather parameter among the weather parameters a behavior of which is not dependent on a Doppler velocity. The weather echo region is determined based on the first weather echo region and the second weather echo region. A signal processing apparatus and a signal processing method with which a zero-Doppler weather echo attenuated, that is, erroneously suppressed, by topographic echo removal processing is readily reconstructed are thus obtained.

Abstract: A fault diagnosis unit (42) of a fault diagnosis apparatus (4) performs a fault diagnosis of a communication network (2) with a probabilistic inference algorithm using information on the communication network (2) having been gathered by an NW monitoring unit (41). A diagnosis result determining unit (43) determines test items for confirming and determining a diagnosis result of the fault diagnosis. A test performing unit (44) performs a confirmation test of the determined test items. The diagnosis result determining unit (43) determines a likelihood of the diagnosis result of the fault diagnosis based on a result of the confirmation test.

Abstract: A method may include obtaining a real-time petrophysical data derived from a plurality of well logs during drilling and utilizing the real-time petrophysical data to quantify a formation damage profile using a resistivity tornado chart and a wellbore modeling. The method further includes utilizing the resistivity tornado chart to determine a depth of invasion inside a formation at each depth in a wellbore by using ratios between different resistivity logs obtained while drilling and creating a synthetic wellbore model by using a fluid flow equation for the wellbore modeling and calculating a time-specific invasion profile to determine a condition at a flowback time. The method further includes performing a computational fluid dynamics investigation in order to identify invaded fluid flow characteristics from the formation to the wellbore and calculating a duration needed to flowback an obtained invaded volume for removal of the formation damage based on a fluid flow behavior.

Abstract: A battery micro-short circuit detection method and apparatus are disclosed. The method includes: obtaining a target initial battery parameter value of a target battery at an initial moment, and determining a reference initial battery parameter value of a virtual reference battery at the initial moment, where a response of the virtual reference battery is the same as a response of the target battery when a same excitation condition is given; obtaining a target battery parameter value of the target battery at a specified moment; determining a reference battery parameter value of the virtual reference battery at the specified moment based on the target battery parameter value and the reference initial battery parameter; and calculating a difference between the target battery parameter value and the reference battery parameter value, and determining, based on the difference, that the target battery is micro-short-circuited.