The present invention provides a method and system for providing on-site electrical power to a fracturing operation, and an electrically powered fracturing system. Natural gas can be used to drive a turbine generator in the production of electrical power. A scalable, electrically powered fracturing fleet is provided to pump fluids for the fracturing operation, obviating the need for a constant supply of diesel fuel to the site and reducing the site footprint and infrastructure required for the fracturing operation, when compared with conventional systems.

The present invention provides a method and system for providing on-site electrical power to a fracturing operation, and an electrically powered fracturing system. Natural gas can be used to drive a turbine generator in the production of electrical power. A scalable, electrically powered fracturing fleet is provided to pump fluids for the fracturing operation, obviating the need for a constant supply of diesel fuel to the site and reducing the site footprint and infrastructure required for the fracturing operation, when compared with conventional systems.

The present invention provides a method and system for providing on-site electrical power to a fracturing operation, and an electrically powered fracturing system. Natural gas can be used to drive a turbine generator in the production of electrical power. A scalable, electrically powered fracturing fleet is provided to pump fluids for the fracturing operation, obviating the need for a constant supply of diesel fuel to the site and reducing the site footprint and infrastructure required for the fracturing operation, when compared with conventional systems.

A grain and flour supply apparatus is provided, including a holding bin provided above a container and having an exhaust port from which gas is discharged, an introduction port into which grain and flour are introduced, and a supply port which supplies the grain and flour to the container; a first vacuum breaker valve opening and closing the exhaust port; a second vacuum breaker valve opening and closing the introduction port; a third vacuum breaker valve opening and closing the supply port; a temperature sensor measuring the temperature in the holding bin; a vacuum device drawing a vacuum in the holding bin; and a control device configured to control the first vacuum breaker valve, the second vacuum breaker valve, the third vacuum breaker valve, and the vacuum device, and set with a target temperature.

Microfluidics is becoming a more popular mainstream technology across many multidisciplinary fields for its clinical, pharmaceutical, and biotechnological applications. As such, more convenient methods of droplet dispersion are desired such as a vacuum-driven system. Regardless of the simplicity of the setup, every operating parameter must be carefully selected and engineered to suit the needs of each experiment. The present invention reports a method for optimization of droplet formation rates for microfluidic flow-focusing devices with rectangular microchannels. More specifically, the method uses the effects of channel dimensions on droplet formation and dripping/jetting to co-flow transitions of two-phase, flow-focusing devices at different pressures for vacuum-driven systems to target a certain desired rate that maximizes intended output.

A mineral spring generator has a machine body and a pipeline disposed in the machine body. Two ends of the pipeline respectively have a water inlet and a water outlet. A solenoid valve is connected between the pipeline. At least two injection channels are connected to the pipeline at intervals along a direction of a water flow in the pipeline. A micromotor is connected between each of the at least two injection channels. An outer end of each of the at least two injection channels is connected to a material container. Each material container is adapted to be filled with a liquid mineral spring concentrate. When the present invention is used, water is inputted through the water inlet, and the solenoid valve and the micromotors are activated to add the mineral spring concentrates in the at least two material containers to different positions of the pipeline.

A system for bone cement includes a vial holder configured for receiving a vial and including a holding structure for maintaining the vial in the vial holder. The vial includes a monomer component for bone cement. A holder chamber is configured to receive and secure the vial holder. The vial holder is advanced toward a vial-breaking device for breaking the vial and releasing its contents into the holder chamber past the elastomeric seal. Once the vial holder is advanced further the elastomeric seal is deformed to form a seal and prevent fumes produced from escaping from the device.

The present invention provides a method and system for providing on-site electrical power to a fracturing operation, and an electrically powered fracturing system. Natural gas can be used to drive a turbine generator in the production of electrical power. A scalable, electrically powered fracturing fleet is provided to pump fluids for the fracturing operation, obviating the need for a constant supply of diesel fuel to the site and reducing the site footprint and infrastructure required for the fracturing operation, when compared with conventional systems.

A liquid-liquid mixing device (10, 210) includes a barrel (20, 220) with a liquid port (23) at or adjacent one end. A plunger assembly (30) is reciprocably moveable along an axis in the barrel (20, 220) and includes a seal member (31, 231) and an agitator (50, 250). The seal member (31, 231) is in sealingly slidable engagement with the internal wall of the barrel (20, 220) to define a variable volume chamber (24, 224) therein in communication with the liquid port. The agitator (50, 250) is reciprocably moveable in the variable volume chamber (24, 224), which agitator (50, 250) includes one or more end to end passages (54) through which liquid in the chamber (24, 224) is forced as the agitator (250) reciprocates in the chamber (24, 224). The device (10) also includes a mode selector mechanism (60, 28, 46, 64, 65, 90, 92, 94, 96) for selection between at least two modes of operation for the plunger assembly, wherein the mode selector mechanism (60, 28, 46, 64, 65, 90, 92, 94, 96) is adjustable between two or more modes whereby movement of the plunger assembly (30) effects either movement of the agitator (50, 250) with the seal member (31, 231) or movement of the agitator (50, 250) relative to the seal member (31, 231), depending on the selected mode.

An analysis system may perform operations on an analyte that may be combined with multiple regents prior to being introduced into a flow cell. The instrument may include a volume into which the reagents to be combined with the analyte are aspirated one-by-one. The volume may be formed as a serpentine channel in a valve manifold associated with sippers for aspirating the reagents. The reagents may then be mixed by cycling a pump to move the reagents within the mixing volume or channel. For this, the reagents may be aspirated from a recipient into the volume or channel, ejected back into the recipient, and this process may be performed repeatedly to enhance mixing.