Abstract: In one embodiment, a scheme is disclosed for supporting wireless access network service request capability in a user equipment (UE) device that is operable in wide area cellular network (WACN) bands as well as in wireless access network bands (e.g., GAN bands and/or UMA bands). The UE device includes capability for gaining Internet Protocol (IP) connectivity with a wireless access network node (e.g., a GAN controller (GANC) or UMA network controller (UNC)). Thereafter, the UE device is operable to initiate a registration request message towards the wireless access network node, wherein the registration request message includes at least one information element pertaining to wireless access network services required by the UE device.

Abstract: Apparatus for injecting liquid into a plant comprising a variable volume dosing chamber with a plunger disposed within the chamber and a chamber inlet and outlet, the inlet and outlet in fluid communication with a common volume of the chamber. The apparatus also comprises a motor and a processor. The motor is configured to drive movement of the piston plunger causing a change in volume in the chamber. The processor is configured to control voltage and power to the motor by creating a plurality of pulses of power that provide energy to said motor; to identify a change in pressure of the liquid discharged from the outlet during an injection operation by monitoring the motor current or the number of revolutions of the motor; and to vary pulse force in response to the identified change in pressure to control the pressure of the liquid discharged from the outlet.

Abstract: The present disclosure provides a valve seat assembly for a fluid end of a hydraulic fracturing pump. The valve seat assembly includes a valve seat having a substantially cylindrical body defined along an axis. The valve seat has a first seat end and a second seat end with a through bore extending between the first and second seat ends. The cylindrical body has an inner cylinder surface and an exterior cylinder surface with an annular flange formed along the exterior cylinder surface adjacent the first seat end. The through bore expands from a first diameter to a second diameter adjacent the first seat end. The valve seat assembly further includes a leak detection notch formed in the exterior cylinder surface between the annular flange and the second seat end.

Abstract: An electric drive hydraulic fracturing pump system includes one or more electric motors, with each electric motor electrically coupled to a dedicated dual inverter to control operation of the motor. A plurality of electric motors may be coupled to each end of a pump crankshaft and configured to provide rotational power to the power end of a hydraulic fracturing pump through a planetary gearset coupled to each end of the crankshaft. A hydraulic cooling circuit having a first and second cooling systems may be used to regulate the temperature of the electric motors and dual inverters.

Abstract: A hydraulic fracturing pump includes a power end with a plurality of torsion tubes extending between sides of a crankcase housing in which a crankshaft is rotatably mounted. The crankshaft is coupled by piston arms to crossheads disposed to reciprocate along crosshead axes that are perpendicular to the crankshaft. Disposed within the crankcase housing are a plurality of ribs generally perpendicular to the crankshaft and extending from the base of the crankshaft housing to an upper surface of the crankshaft housing. The torsion tubes are generally adjacent the upper surface of the crankcase housing and pass perpendicularly through each of the plurality of ribs and are attached to the ribs to provide rigidity to the power end.

Abstract: An electric drive hydraulic fracturing pump system includes one or more electric motors, with each electric motor electrically coupled to a dedicated dual inverter to control operation of the motor. A plurality of electric motors may be coupled to each end of a pump crankshaft and configured to provide rotational power to the power end of a hydraulic fracturing pump through a planetary gearset coupled to each end of the crankshaft. A hydraulic cooling circuit having a first and second cooling systems may be used to regulate the temperature of the electric motors and dual inverters.

Abstract: A packing carton for pump valves includes a base, a first set of opposing sides extending up from the base, and a second set of opposing sides extending up from the base, such that adjacent sides join together to form a corner. The packing carton further includes a first circular corner receptacle formed at a first corner, a second circular corner receptacle formed at a second corner and adjacent the first receptacle, a third circular corner receptacle formed at a third corner, and a fourth circular corner receptacle formed at a fourth corner and adjacent the third receptacle.

Abstract: An electric drive hydraulic fracturing pump system includes one or more electric motors, with each electric motor electrically coupled to a dedicated dual inverter to control operation of the motor. A plurality of electric motors may be coupled to each end of a pump crankshaft and configured to provide rotational power to the power end of a hydraulic fracturing pump through a planetary gearset coupled to each end of the crankshaft. A hydraulic cooling circuit having a first and second cooling systems may be used to regulate the temperature of the electric motors and dual inverters.

Abstract: An electric drive hydraulic fracturing pump system includes one or more electric motors, with each electric motor electrically coupled to a dedicated dual inverter to control operation of the motor. A plurality of electric motors may be coupled to each end of a pump crankshaft and configured to provide rotational power to the power end of a hydraulic fracturing pump through a planetary gearset coupled to each end of the crankshaft. A hydraulic cooling circuit having a first and second cooling systems may be used to regulate the temperature of the electric motors and dual inverters.

Abstract: An electric drive hydraulic fracturing pump system includes one or more electric motors, with each electric motor electrically coupled to a dedicated dual inverter to control operation of the motor. A plurality of electric motors may be coupled to each end of a pump crankshaft and configured to provide rotational power to the power end of a hydraulic fracturing pump through a planetary gearset coupled to each end of the crankshaft. A hydraulic cooling circuit having a first and second cooling systems may be used to regulate the temperature of the electric motors and dual inverters.

Abstract: A pump body of a high pressure fuel pump defines a compression chamber in fluid communication with a first recess dug in a first outer face. A second recess is dug in a second outer face of the body. An inlet channel opens in a conduit extending between the first recess and the second recess.

Abstract: A hydraulic fracturing pump includes a pinion assembly extending along a pinion axis and mounted in a crankcase, and having a first pinion shaft and a second pinion shaft coupled together by a keyless coupler. Each pinion shaft includes an input pinion gear mounted on one end of the pinion shaft. A crankshaft disposed along a crankshaft axis is mounted in the crankcase, and is parallel with but spaced apart from the pinion axis. The crankshaft includes a bull gear mounted on each end of the crankshaft with each bull gear interconnected to an input pinion gear by an intermediate gear assembly. Each intermediate gear assembly extends along an intermediate axis parallel with, but spaced apart from, the crankcase and pinion axii. Each intermediate assembly has an intermediate shaft with a first intermediate gear meshed with a pinion gear and a second intermediate gear meshed with the bull gear.

Abstract: A hydraulic fracturing pump includes a power end with a plurality of torsion tubes extending between sides of a crankcase housing in which a crankshaft is rotatably mounted. The crankshaft is coupled by piston arms to crossheads disposed to reciprocate along crosshead axes that are perpendicular to the crankshaft. Disposed within the crankcase housing are a plurality of ribs generally perpendicular to the crankshaft and extending from the base of the crankshaft housing to an upper surface of the crankshaft housing. The torsion tubes are generally adjacent the upper surface of the crankcase housing and pass perpendicularly through each of the plurality of ribs and are attached to the ribs to provide rigidity to the power end.

Abstract: A hydraulic fracturing pump includes a pinion assembly extending along a pinion axis and mounted in a crankcase, and having a first pinion shaft and a second pinion shaft coupled together by a keyless coupler. Each pinion shaft includes an input pinion gear mounted on one end of the pinion shaft. A crankshaft disposed along a crankshaft axis is mounted in the crankcase, and is parallel with but spaced apart from the pinion axis. The crankshaft includes a bull gear mounted on each end of the crankshaft with each bull gear interconnected to an input pinion gear by an intermediate gear assembly. Each intermediate gear assembly extends along an intermediate axis parallel with, but spaced apart from, the crankcase and pinion axii. Each intermediate assembly has an intermediate shaft with a first intermediate gear meshed with a pinion gear and a second intermediate gear meshed with the bull gear.

Abstract: A valve head assembly for a hydraulic fracturing pump. The valve head assembly includes a valve body attached to a valve leg assembly with backward swept or delta shaped legs. Each leg is attached to a main leg shaft which extends along a main axis. Each leg has a first leg segment and a second leg segment. The first leg segment has a first end that attaches to a distal end of the main leg shaft and extends along a first leg segment axis back towards the valve body. The second end of the first leg segment attaches to the second leg segment which extends along a second leg segment axis that is substantially parallel with but spaced apart from the main axis. The first leg segment may form an angle between the main axis and the first leg segment axis that is between approximately 10 and 60 degrees.

Abstract: A hydraulic fracturing pump includes a power end with a plurality of torsion tubes extending between sides of a crankcase housing in which a crankshaft is rotatably mounted. The crankshaft is coupled by piston arms to crossheads disposed to reciprocate along crosshead axes that are perpendicular to the crankshaft. Disposed within the crankcase housing are a plurality of ribs generally perpendicular to the crankshaft and extending from the base of the crankshaft housing to an upper surface of the crankshaft housing. The torsion tubes are generally adjacent the upper surface of the crankcase housing and pass perpendicularly through each of the plurality of ribs and are attached to the ribs to provide rigidity to the power end.

Abstract: A hydraulic fracturing pump includes a power end with a plurality of torsion tubes extending between sides of a crankcase housing in which a crankshaft is rotatably mounted. The crankshaft is coupled by piston arms to crossheads disposed to reciprocate along crosshead axes that are perpendicular to the crankshaft. Disposed within the crankcase housing are a plurality of ribs generally perpendicular to the crankshaft and extending from the base of the crankshaft housing to an upper surface of the crankshaft housing. The torsion tubes are generally adjacent the upper surface of the crankcase housing and pass perpendicularly through each of the plurality of ribs and are attached to the ribs to provide rigidity to the power end.

Abstract: An electric drive hydraulic fracturing pump system includes one or more electric motors, with each electric motor electrically coupled to a dedicated dual inverter to control operation of the motor. A plurality of electric motors may be coupled to each end of a pump crankshaft and configured to provide rotational power to the power end of a hydraulic fracturing pump through a planetary gearset coupled to each end of the crankshaft. A hydraulic cooling circuit having a first and second cooling systems may be used to regulate the temperature of the electric motors and dual inverters.

Abstract: A packing carton for pump valves includes a base, a first set of opposing sides extending up from the base, and a second set of opposing sides extending up from the base, such that adjacent sides join together to form a corner. The packing carton further includes a first circular corner receptacle formed at a first corner, a second circular corner receptacle formed at a second corner and adjacent the first receptacle, a third circular corner receptacle formed at a third corner, and a fourth circular corner receptacle formed at a fourth corner and adjacent the third receptacle.

Abstract: A pump body of a high pressure fuel pump defines a compression chamber in fluid communication with a first recess dug in a first outer face. A second recess is dug in a second outer face of the body. An inlet channel opens in a conduit extending between the first recess and the second recess.