Abstract: A half bridge switching cell includes two primary switching elements connected in totem pole, across an input voltage source, wherein a connection common to the primary switching elements is defined as a primary switching node. A transformer has a primary winding in series with a capacitor, connected between the primary switching node and the input voltage source, and two secondary windings, each having first and second ends. The cell includes two synchronized rectifiers, each corresponding to a respective one of the primary switching elements, such that each of the synchronized rectifiers conducts when the respective one of the corresponding primary switching elements is not conducting. The first end of each secondary winding is connected to the drain of a respective one of the two synchronous rectifiers, and the second ends of the secondary windings are connected to a common connection and to at least one controlled current source.

Abstract: An anchor catcher tool can support tubing in casing. The tool is a slimline tool that can be set and unset with a partial (quarter) turn of a mandrel using a setting mechanism, such as a J-slot and pin arrangement. Uphole and downhole cages of the tool carry opposing slips. When set, the slips engage opposing cone faces to wedge against the casing and prevent movement of the tool. Excluded gas can flow up the annulus to the surface through aligned longitudinal flow paths on the exterior of the tool's components. To do this, a sleeve floating on the mandrel has the cone faces thereon and is longitudinally engaged with cages, which float on the mandrel and carry the slips. The sleeve keeps longitudinal channels on the cages and longitudinal divisions of the cone faces aligned with one another to produce the flow paths for annular flow.

Abstract: Biogenic activated carbon compositions disclosed herein comprise at least 55 wt % carbon, some of which may be present as graphene, and have high surface areas, such as Iodine Numbers of greater than 2000. Some embodiments provide biogenic activated carbon that is responsive to a magnetic field. A continuous process for producing biogenic activated carbon comprises countercurrently contacting, by mechanical means, a feedstock with a vapor stream comprising an activation agent including water and/or carbon dioxide; removing vapor from the reaction zone; recycling at least some of the separated vapor stream, or a thermally treated form thereof, to an inlet of the reaction zone(s) and/or to the feedstock; and recovering solids from the reaction zone(s) as biogenic activated carbon. Methods of using the biogenic activated carbon are disclosed.

Abstract: A battery module that includes a stack of battery cells is disclosed, each battery cell of the battery module has a terminal, and the terminal has a first alloy of a metal, the battery module has a bus bar that includes a body having a nickel plating on at least a portion of the body, and an indentation disposed on the body, where a thickness of the nickel plating is between 0.2% and 20% of an overall thickness of the body, a weld physically and electrically couples the terminal to the bus bar, and the nickel plating enables the weld to be stronger than a weld between the first and second alloys.

Abstract: A packer assembly includes a mandrel and a packing element disposed about the mandrel. Upper and lower recovery sleeves are disposed about the mandrel and extend between the mandrel and respective upper and lower ends of the packing element. The upper and lower recovery sleeves each have a recovery profile embedded within the packing element. Upper and lower backup assemblies are movably disposed about the respective upper and lower recovery sleeves, adjacent to the respective upper and lower ends of the packing element. The packer assembly includes at least one release mechanism. When setting the packer assembly in a bore, the packing element is axially compressed between the upper and lower backup assemblies to contact the bore wall, and the upper and lower backup assemblies splay outwards. Upon release, the packing element and backup assemblies retract, thereby facilitating retrieval of the packer assembly from the bore.

Abstract: A downhole pump used for a reciprocating pump includes a barrel and a plunger. The barrel couples to a tubing string and has a standing valve. The plunger couples to a rod string and has a traveling valve. One or both of the valves can include an assembly comprising a housing and an insert. The insert allowing for flow therethrough has a ball stop and a ball passage. Positioned in the housing, one end of the insert engages a tapered sidewall in the housing. The insert is secured with metallic material metallurgically affixed between the insert and the housing. For example, brazing material can be brazed at the end of the insert to metallurgically affix the insert in the passage. A ball is positioned in the insert, and a seat is positioned adjacent an end of the insert. The assembly is then incorporated into components of the pump.

Abstract: Systems and methods for improving operation of an automotive battery system including an automotive electrical system comprising a battery system that uses operational parameters, predicted internal resistance of a battery expected over a prediction horizon, and real-time internal resistance of a battery to increase performance and reliability. The battery system includes a battery electrically coupled to electrical devices in the automotive system, sensors coupled to the battery that determine terminal voltage of battery, and a battery control system communicatively coupled to sensors.

Abstract: A downhole assembly includes a tubular body having a bore and a downhole tool connected to the tubular body. The downhole assembly also includes a sensor assembly having a carrier and a sensor. A sensor adapter is used to couple the sensor assembly to the tubular body. The sensor adapter includes an adapter body disposed in the bore of the tubular body; an adapter shaft for connection with the carrier; and a plurality of channels formed between the adapter shaft and the adapter body.

Abstract: Disclosed herein is a battery system, comprising: a battery module comprising a housing; a battery terminal disposed on a first side of the housing of the battery module; and a cover disposed on the housing, wherein the cover comprises a battery terminal cover extending from the cover and configured to adjust between a first position and a second position, wherein the battery terminal cover, in the first position, is configured to at least partially shroud the battery terminal, and wherein the battery terminal cover, in the second position, is configured to expose the battery terminal.

Abstract: A method described herein may include receiving a first text from a first user associated with a service provider, wherein the first text indicates an experience of the service provider. The method may include receiving a second text from a second user associated with a consumer, wherein the second text indicates a service requested by the consumer. An AI engine may determine a degree to which the first text and the second text are associated with same or similar topics. A match score may be generated based on the determination of the AI engine, wherein the match score indicates a degree to which the experience of the service provider matches the service requested by the consumer. The match score may be output to the first user or the second user.

Abstract: An injection delivery device involves a body, a medication-containing vial within at least a portion of the body, the medication-containing vial having an open end and a closed end opposite the open end. The open end of the vial includes a seal that prevents medication contained therein from exiting the vial until delivery of the medication to a target injection site is desired. The injection delivery device also includes a plunger positioned near the open end of the vial and a needle having a passage therethrough, wherein the needle, plunger and vial are positioned relative to each other such that, during delivery of an injection, a portion of the passage will be within the plunger, and the plunger and needle will remain stationary relative to each other while the vial moves relative the plunger in a direction towards the target injection site.

Abstract: A bus bar including a first end comprising a first material and a second end comprising a second material and a method of manufacture are provided. The first end is designed to be coupled to a terminal of a first battery cell of a battery module and includes a first collar disposed on the first end designed to receive and surround the terminal of the first battery cell of the battery module. The second end is designed to be coupled to a terminal of a second battery cell of the battery module and includes a second collar disposed on the second end designed to receive and surround the terminal of the second battery of the battery module. The first and second batteries of the battery module are adjacent to one another. Moreover, the bus bar includes a joint electrically and mechanically coupling the first end and the second end.

Abstract: A completion string for running gas-lift operations in a hydrocarbon well has a bypass string with a central bore for flowing production fluids to the surface and an annular passageway for flowing gas-lift gas downwards to a gas-lift assembly in the wellbore.

Abstract: A battery grid is disclosed. The battery grid includes a pattern of grid wires. The pattern includes a grid wire having a first segment with a first corrosion resistance and a second segment with a second corrosion resistance which is less than the first corrosion resistance. The second segment corrodes at a rate which is faster than the corrosion rate of the first segment so as to dynamically release internal stress and control grid growth of the battery grid during its service life. A battery includes said grid and a method of forming said grid are also disclosed.

Abstract: A tubular is prepared for downhole use to include integrated centralizer feature disposed thereon. Blade elements are disposed about a surface of the tubular. An interconnection, such as a band, connected between the blade elements can be used to wrap them circumferentially about the tubular. The blade elements are then affixed to the surface of the tubular to produce the integrated centralizer features by coating a spray welding material over at least a portion of the plurality of blade elements and over at least an adjacent portion of the surface of the tubular. The blade elements can be hollow vanes or fins so they are collapsible when a restriction is encountered downhole to avoid a stuck pipe situation.

Abstract: A long-stroke pumping unit includes a tower; a counterweight assembly movable along the tower; a crown mounted atop the tower; a sprocket supported by the crown and rotatable relative thereto; and a belt. The unit further includes a motor having a stator mounted to the crown and a rotor torsionally connected to the sprocket; and a sensor for detecting position of the counterweight assembly. The pumping unit may include a dynamic control system for controlling a speed of a motor.

Abstract: Techniques and apparatuses for recognizing accented speech are described. In some embodiments, an accent module recognizes accented speech using an accent library based on device data, uses different speech recognition correction levels based on an application field into which recognized words are set to be provided, or updates an accent library based on corrections made to incorrectly recognized speech.

Abstract: Disclosed is a battery system comprising a solid-state relay assembly comprising a device-side driver circuitry having a device-side switching device, a battery-side driver circuitry having a battery-side switching device, a first recirculation driver circuitry, a first recirculation switching device, a second recirculation switching device, and a second recirculation driver circuitry.

Abstract: A plug for use in a wellbore has a piston that is movable on a body. A control valve is disposed in communication between the wellbore and a piston chamber and can capture wellbore pressure in the piston chamber. A closure on the body can transition from a closed condition to an open condition relative to the port in response to the movement of the piston. A fixture releasably holds the closure in the closed condition on the body. The fixture releases in response an increased pressure differential on the piston above an initial pressure differential between the captured chamber pressure and the wellbore pressure.