A method includes supplying a plurality of generators, each generator in electrical communication with a switchgear with each switchgear in data communication with a generator data management system. The method also includes supplying a plurality of electrically driven fracturing pumps with each electrically driven fracturing pump in data communication with pump data management system. Further, the method includes supplying a load shedding system, the load shedding system in data communication with the generator data management system and a pump control system, the pump control system in data communication with the pump data management system. The method includes determining which pumps should have speed reduced by the load shedding system and reducing the speed of the pumps determined by the load shedding system using the pump control system.

Systems and methods for monitoring, detecting, and/or intervening with respect to cavitation and pulsation events during hydraulic fracturing operations may include a supervisory controller. The supervisory controller may be configured to receive pump signals indicative of one or more of pump discharge pressure, pump suction pressure, pump speed, or pump vibration associated with operation of the hydraulic fracturing pump. The supervisory controller also may be configured to receive blender signals indicative of one or more of blender flow rate or blender discharge pressure. Based on one or more of these signals, the supervisory controller may be configured to detect a cavitation event and/or a pulsation event. The supervisory controller may be configured to generate a cavitation notification signal indicative of detection of cavitation associated with operation of the hydraulic fracturing pump, and/or a pulsation notification signal indicative of detection of pulsation associated with operation of the hydraulic fracturing pump.

An electric power take-off system for mounting to a truck body to complement an existing power-take-off system powered by an internal combustion engine. The system includes a motor, a battery for providing electrical power to the motor, a fluid reservoir, a pump for pumping fluid through at least one hose from the fluid reservoir to at least one truck function and for return of the fluid to the reservoir. The system also includes a system interlock rendering inoperable the electric power-take-off system when the internal combustion engine is in operation and a motor controller in communication with the motor for controlling the power output of the motor. The system also includes a charging unit for charging of the battery and a data management system operable to collect data.

The present invention provides a portable device for injecting repair material, the portable device comprising: a chassis frame; tanks storing source materials; pumping means pumping the source materials; an injection nozzle mixing the source materials and injecting repair material into cracks; source material supplying means including: operating blocks connected to the pumping means; supplying pipes connected to the operating blocks and supplied with the source materials; transferring pipes connected to the operating blocks and transferring the source materials into the injection nozzle, and a pressure controller connected to the transferring pipe and controlling the source materials, wherein check valves for preventing backflow are installed inside the transferring pipes, wherein by adjusting another check valve connected to the pressure controller, an amount of the repair material for injection is controlled.

Devices and methods to drive a pig along an interior tube or pipeline are described herein. The pigging unit may be separate from any large trailer to allow for operation of the pigging unit in locations with spatial constraints. The apparatus generally includes a skid, internal components, access points on the exterior of the skid, and a control device.

A hydraulic actuation device includes a tool, an actuation part having a pressure oil supply mechanism configured to send pressure oil from an oil chamber to the tool and return return oil from the tool to the oil chamber, an operation handle for adjusting oil passages for the pressure oil and the return oil in the pressure oil supply mechanism and configured to be able to be moved from an initial position, and biasing means configured to bias the operation handle toward the initial position when no external force is applied to the operation handle. When the operation handle moves from the initial position, the tool is actuated by the actuation part. When the operation handle is returned to the initial position by the biasing means, operation of the tool by the actuation part is stopped.

An electric drive pump system includes a power end and a detachable transmission assembly. The transmission assembly is mounted to the power end and is configured to provide rotational power to the power end through a plurality of electric motors. The plurality of electric motors use a gearbox to drive an output spline that engages the power end. A control module is used to regulate the performance characteristics of the plurality of electric motors. A temperature regulation assembly is configured to regulate the temperature of the transmission assembly and the power end.

A fracturing apparatus may include a power supply platform; a gas turbine engine; a generator; and one or more rectifiers. At least two of the gas turbine engine, the generator, and the one or more rectifiers are arranged on the power supply platform. A first end of the generator is connected to the gas turbine engine. A second end of the generator is connected to the one or more rectifiers. The generator is configured to output a voltage to the one or more rectifiers.

A fluid routing plug for use with a fluid end section. The fluid end section being one of a plurality of fluid end sections making up a fluid end side of a high pressure pump. The fluid routing plug is installed within a horizontal bore formed in a fluid end section and is configured to route fluid throughout the fluid end section.

A mobile source of electricity is converted from a transportation mode to an operational mode. A turbine disposed on the mobile source of electricity is operated to generate electricity in the operational mode. A first control valve is operated to feed a cooling agent from a cooling agent source into a heat transfer apparatus disposed in an air intake flow path of the turbine to cool intake air. A second control valve is operated to vent from the heat transfer apparatus, the cooling agent that is heated by absorbing heat from the intake air flowing through the air intake flow path. A controller controls the first and second control valves to maintain the cooling agent having predetermined properties in the heat transfer apparatus.