A method of predicting an adverse event associated with an implantable blood pump including determining a plurality of pump parameters, comparing the plurality of pump parameters to a plurality of threshold values corresponding to the plurality of pump parameters, calculating a weighted sum using the compared plurality of pump parameters to the plurality of threshold values, calculating an adverse event risk score using the calculated weighted sum, and generating an alert when the calculated adverse event risk score deviates from a predetermined value.

A method of predicting an adverse event associated with an implantable blood pump including determining a plurality of pump parameters, comparing the plurality of pump parameters to a plurality of threshold values corresponding to the plurality of pump parameters, calculating a weighted sum using the compared plurality of pump parameters to the plurality of threshold values, calculating an adverse event risk score using the calculated weighted sum, and generating an alert when the calculated adverse event risk score deviates from a predetermined value.

Closed circulation system for production of and continuously preparing a polymer solution, including a pneumatic stirrer inside and a charging hopper at a top of a drag-reducing polymer solution tank, a gas drainage pump, a submersible pump, and a compressed air pipe connected to a pneumatic diaphragm pump. A liquid inlet of the pneumatic diaphragm pump is connected to a liquid outlet of the drag-reducing polymer solution tank, and the gas drainage pump liquid discharge pipe and a liquid outlet pipe of the diaphragm pump leads to a circulation water pool; a liquid outlet of the submersible pump is connected to a liquid inlet of the drag-reducing polymer solution tank and a liquid inlet of the gas drainage pump respectively through a three way pipe. The pneumatic stirrer and pneumatic diaphragm pump operate at speeds, so the drag-reducing polymer solution is mixed uniformly and fed into the circulation water pool.

Closed circulation system for production of and continuously preparing a polymer solution, including a pneumatic stirrer inside and a charging hopper at a top of a drag-reducing polymer solution tank, a gas drainage pump, a submersible pump, and a compressed air pipe connected to a pneumatic diaphragm pump. A liquid inlet of the pneumatic diaphragm pump is connected to a liquid outlet of the drag-reducing polymer solution tank, and the gas drainage pump liquid discharge pipe and a liquid outlet pipe of the diaphragm pump leads to a circulation water pool; a liquid outlet of the submersible pump is connected to a liquid inlet of the drag-reducing polymer solution tank and a liquid inlet of the gas drainage pump respectively through a three way pipe. The pneumatic stirrer and pneumatic diaphragm pump operate at speeds, so the drag-reducing polymer solution is mixed uniformly and fed into the circulation water pool.

An apparatus for the conveying of viscous material from a container has a conveyor pump, which has a conveyor cylinder and a conveyor piston that can be moved forward and back in the conveyor cylinder, and has a measuring device for measurement of the speed of the conveyor piston. The measuring device has a control unit for control of the conveying of the viscous material in dependence on the measured speed of the conveyor piston and a waste line is branched off from a conveying line for the viscous material, which is connected to the conveyor pump, and using the control unit the conveying line can be blocked and the waste line can be released.

A method for hydraulically fracturing a subterranean formation includes sending a first command from a controller to a pump to achieve a first target flow rate for a fracturing fluid being injected into a subterranean formation during a fracturing operation. Monitoring an injection property of the fracturing operation. Determining a rate of change of the pressure over a first time period. Determining, by the controller, a second target flow rate based, at least in part, on the rate of change of the pressure. Sending a second command from the controller to the pump to achieve the second target flow rate for the fracturing fluid.

A system for supplying compressed gas to several gas-fed devices is based on a liquid piston gas multistage compressor (100). Gas pressure measurements performed at a gas intake (10), an intermediate gas outlet (20) and at an end gas outlet (30) of the system allow controlling respective gas capacities of the compressor stages. Easy and reliable control can thus be obtained for the system operation. Varying the number of the compressor stages allows matching any pressure requirements for the gas delivery to all the gas-fed devices, and varying the gas capacities of the compressor stages allows easy adaptation to variable gas consumptions of the gas-fed devices.

A heat insulating vessel including an inner tank having a vertical axis to accommodate low temperature liquefied gas, an outer tank externally around the inner, and a low temperature liquefied gas pump disposed inside the inner tank. The outer tank having an upper part and an outer tank body. A lid structure having a heat-insulated structure detachably fitted into an upper part of the inner. The heat insulating vessel includes a first fastener to fasten with bolts, a first flange to upper ends of the inner and outer tanks upper part to a second flange to an outer circumferential part of the lid structure, and a second fastener to fasten with bolts, a third flange to an upper end of the outer tank body to a fourth flange to a lower end of the outer tank upper part. A vacuum insulating layer is formed between the inner and outer tanks.

A pump having at least a fluid pump chamber (11) and a first driver chamber (12) separated from the fluid pump chamber (11) by an elastic wall (13, 13-1, 13-2) is described with the first driver chamber (12) expanding after a chemical reaction between fuel and oxidant and driving through deformation of the elastic wall fluid out of the fluid pump chamber (11), with the main parts of the pump being made of an elastic material to be used for example as a body implant.

A pump having at least a fluid pump chamber (11) and a first driver chamber (12) separated from the fluid pump chamber (11) by an elastic wall (13, 13-1, 13-2) is described with the first driver chamber (12) expanding after a chemical reaction between fuel and oxidant and driving through deformation of the elastic wall fluid out of the fluid pump chamber (11), with the main parts of the pump being made of an elastic material to be used for example as a body implant.