Abstract: The disclosure provides a method and system for multiple symbol-frames to encode and decode each symbol-frame code value in contrast to current schemes of encoding and decoding the symbol-frame code based on evaluating single symbol-frames code for each bitstream value. By evaluating multiple symbol-frames and their relationship to each other to encode and decode each symbol-frame code value, the relationship between the pulse width and symbol-frame width can be varied. The description of the exemplary embodiment maintains the same symbol-frame width with a much wider pulse and encoding and decoding multiple symbols-frames to achieve higher data rate telemetry while maintaining the integrity of a signal. The method and associated software to code and decode multiple symbol-frames and their relationship to each other has demonstrated multiples of increased speed that significantly increases the capability of telemetry communication.

Abstract: The disclosure provides an improved fluid operated pulser. The pulser utilizes a pilot valve to create differential pressure to directly actuate a main valve to block or unblock a fluid flow. The invention provides a main valve that is simpler, more reliable, and wear resistant. The invention uses a differential pressure inside the volume under a pilot valve to directly actuate a main valve to block or unblock the fluid flow through the orifice, and thus creates a positive pressure pulse inside the collar. The main valve has only one moving part, the main valve element, and sometimes a spring. The main valve element can be spherical or cylindrical and rotate in a volume adjacent the pilot valve. The variable exposure of surface area results in reduced erosion on the main valve element to extend the main valve life, and reduced need for stopping expensive operations to replace the pulser.

Abstract: The invention provides a compact electromagnetic (EM) combo machine formed of a generator portion and a motor portion providing electrical power generation and actuation of a rotating or displacing shaft. The EM combo machine can be immersed in a flowing fluid. A turbine coupled to the generator portion can rotate a rotor on the generator portion. The generator portion that generates electrical power can be electrically directly coupled to the motor portion that actuates devices and can be within a single package. The speed of the motor portion can be controlled with a braking technique that includes a controlled electrical load. Any required relative rotational speed in revolutions per minute can be achieved by optimizing the number of poles of the motor portion compared to the generator portion. The possible combinations of radial flux and an axial flux designs for the EM combo machine provides added flexibility.

Abstract: The invention provides a generator suited for drilling equipment, such as oil and gas applications. A turbine can drive the permanent-magnet, synchronous generator. The generator uses axial flux topology for a stator and a rotor. The design permits a wide airgap between the stator and rotor, so fluid and debris from drilling operations can flow through the generator relatively unobstructed, and the fluid flow can provide a power source to rotate the turbine coupled to the rotor to generate electrical power. The airgap can accommodate non-magnetic sealing plates to provide additional protection to the generator components. The rotor includes a Halbach magnet array of permanent magnets, producing high-intensity magnetic flux in an axial direction. The Halbach magnet array avoids any necessity for the conventional rotor back-iron to return the flux. The proposed generator is intended to generate electric power for drilling equipment, permitting the elimination of costly batteries.

Abstract: The present disclosure provides a method and system for supplemental processing of recorded historical data in real time to fill in gaps of lost data. A user who may be monitoring the data from human interfaces can immediately recognize an issue, quickly change one or more settings for parameters (including changing one or more of the parameters), and replay for reprocessing the recorded data to provide a revised output that can catch up to the processing of later current data without needing to halt operations. In at least one field of use, the invention can eliminate the need for restarting a complete drilling process to resynchronize the surface system when the system is not able to demodulate a valid bitstream, saving time and maintaining high drilling efficiency.

Abstract: The present disclosure provides an electrical motor configured to operate with conductive fluids internal to the motor without short-circuiting. One embodiment is a telemetry modulator that can include the electric motor and a valve coupled with the electric motor. The valve has a valve stator and a valve rotor, and the electric motor can be used to control accurately the valve opening and closing with valve rotor rotation. The valve rotor can rotate continuously or in oscillations to generate a continuous pressure wave, such as for MWD/LWD communication. The electric motor is configured to allow drilling mud to flow into the electric motor without short-circuiting by the motor stator and/or motor rotor having an electric motor winding and a termination for the winding, the winding and termination having a nonconductive coating. The electric motor can be used in other applications inside and outside the oil field environment.

Abstract: The invention provides a generator suited for drilling equipment, such as oil and gas applications. A turbine can drive the permanent-magnet, synchronous generator. The generator uses axial flux topology for a stator and a rotor. The design permits a wide airgap between the stator and rotor, so fluid and debris from drilling operations can flow through the generator relatively unobstructed, and the fluid flow can provide a power source to rotate the turbine coupled to the rotor to generate electrical power. The airgap can accommodate non-magnetic sealing plates to provide additional protection to the generator components. The rotor includes a Halbach magnet array of permanent magnets, producing high-intensity magnetic flux in an axial direction. The Halbach magnet array avoids any necessity for the conventional rotor back-iron to return the flux. The proposed generator is intended to generate electric power for drilling equipment, permitting the elimination of costly batteries.

Abstract: The present disclosure provides a method and system for supplemental processing of recorded historical data in real time to fill in gaps of lost data. A user who may be monitoring the data from human interfaces can immediately recognize an issue, quickly change one or more settings for parameters (including changing one or more of the parameters), and replay for reprocessing the recorded data to provide a revised output that can catch up to the processing of later current data without needing to halt operations. In at least one field of use, the invention can eliminate the need for restarting a complete drilling process to resynchronize the surface system when the system is not able to demodulate a valid bitstream, saving time and maintaining high drilling efficiency.

Abstract: The disclosure provides a method and system to recover some or all of the data missing in types of gaps that occur in data streams received via telemetry. The gaps can be filled in real time to enhance operator understanding of current operations. For gaps created by special sequences sent via telemetry during a time interval that telemetry would be sending measurement blocks (MB) of data, the gaps can be filled using special MBs combined with MBs for a next time interval to create combined MBs, sent via telemetry, and extracted to backfill the gaps. For gaps caused by corrupted data, the gaps can be filled with data from overlapping MBs having overlapping data based on overlapping time intervals. For gaps caused by gap events, including different drilling rates of penetration, event MBs with sampling rates different than a predetermined sampling rate can be sent via telemetry.

Abstract: The disclosure provides a method and system to recover some or all of the data missing in types of gaps that occur in data streams received via telemetry. The gaps can be filled in real time to enhance operator understanding of current operations. For gaps created by special sequences sent via telemetry during a time interval that telemetry would be sending measurement blocks (MB) of data, the gaps can be filled using special MBs combined with MBs for a next time interval to create combined MBs, sent via telemetry, and extracted to backfill the gaps. For gaps caused by corrupted data, the gaps can be filled with data from overlapping MBs having overlapping data based on overlapping time intervals. For gaps caused by gap events, including different drilling rates of penetration, event MBs with sampling rates different than a predetermined sampling rate can be sent via telemetry.

Abstract: The present disclosure provides a bearing design that accommodates misalignment of a rotatable shaft in the bearing and is well suited to usage in a particulate-laden fluid. The bearing can be shaped with a curved surface along a longitudinal axis of the bearing, such as in a curved barrel shape or a ball shape, to provide a point contact instead of a line contact as is the case with conventional plain bearings. The point contact allows the bearing to adjust with a misalignment between ends of the shaft or between the external supports and facilitates the assembly and disassembly of the rotating shaft. Because the bearing compensates for misalignment, the bearing surfaces can have closer tolerances for a smaller gap between the bearing surfaces, which can result in improved performance.

Abstract: The present disclosure provides a bearing design that accommodates misalignment of a rotatable shaft in the bearing and is well suited to usage in a particulate-laden fluid. The bearing can be shaped with a curved surface along a longitudinal axis of the bearing, such as in a curved barrel shape or a ball shape, to provide a point contact instead of a line contact as is the case with conventional plain bearings. The point contact allows the bearing to adjust with a misalignment between ends of the shaft or between the external supports and facilitates the assembly and disassembly of the rotating shaft. Because the bearing compensates for misalignment, the bearing surfaces can have closer tolerances for a smaller gap between the bearing surfaces, which can result in improved performance.

Abstract: The present disclosure provides an electrical motor configured to operate with conductive fluids internal to the motor without short-circuiting. One embodiment is a telemetry modulator that can include the electric motor and a valve coupled with the electric motor. The valve has a valve stator and a valve rotor, and the electric motor can be used to control accurately the valve opening and closing with valve rotor rotation. The valve rotor can rotate continuously or in oscillations to generate a continuous pressure wave, such as for MWD/LWD communication. The electric motor is configured to allow drilling mud to flow into the electric motor without short-circuiting by the motor stator and/or motor rotor having an electric motor winding and a termination for the winding, the winding and termination having a nonconductive coating. The electric motor can be used in other applications inside and outside the oil field environment.

Abstract: The present disclosure describes a downhole tool including an electrically operated radiation generator that selectively output radiation to a surrounding environment based at least in part on supply of electrical power; and a control system that determines likelihood of exposing living beings in the surrounding environment to output radiation by determining whether one or more check conditions is met; determine that each of the one or more check conditions is met before instructing the electrically operated radiation generator to output radiation; and instruct the electrically operated radiation generator to cease output of radiation when at least one of the one or more check conditions is no longer met.

Abstract: The present invention relates to methods for weight management that utilize modified-release dosage forms comprising (R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine salts and crystalline forms thereof. The present invention further relates to (R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine salts, crystalline forms thereof and modified-release dosage forms comprising them.

Abstract: The present invention relates to methods for weight management that utilize modified-release dosage forms comprising (R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine salts and crystalline forms thereof. The present invention further relates to (R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine salts, crystalline forms thereof and modified-release dosage forms comprising them.

Abstract: The present invention relates to methods for weight management that utilize modified-release dosage forms comprising (R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine salts and crystalline forms thereof. The present invention further relates to (R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine salts, crystalline forms thereof and modified-release dosage forms comprising them.

Abstract: The present invention relates to methods for weight management that utilize modified-release dosage forms comprising (R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine salts and crystalline forms thereof. The present invention further relates to (R)-8-chloro-1-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine salts, crystalline forms thereof and modified-release dosage forms comprising them.

Abstract: The present disclosure describes a downhole tool including an electrically operated radiation generator that selectively output radiation to a surrounding environment based at least in part on supply of electrical power; and a control system that determines likelihood of exposing living beings in the surrounding environment to output radiation by determining whether one or more check conditions is met; determine that each of the one or more check conditions is met before instructing the electrically operated radiation generator to output radiation; and instruct the electrically operated radiation generator to cease output of radiation when at least one of the one or more check conditions is no longer met.

Abstract: A method for decoding includes: determining an expected power according to the current remaining power and an expected decoding time length, determining a first average power according to the accumulated decoding time length and the accumulated power consumption of the decoder from the moment it starts to work until the current moment; determining a second average power according to the accumulated decoding time length and the accumulated power consumption in the process of decoding the latest preset number of image groups; when the absolute value of the difference between the expected power and the second average power exceeds a preset threshold and the expected power is not equal to the first average power, determining the operation mode of the decoder according to the size relationship between the expected power and the first average power and decoding a data frame according to the determined operation mode.