A system for dewatering a subsea gas pipeline includes a pig launcher at the pipeline's upper end, which may be at or near the sea surface, and a pig receiver at the pipeline's lower end, which may be at or near the sea floor. A multiphase pump unit is deployed at the pipeline lower end and is configured to provide sea water suction to aid in a pig train being forced downwards through pipeline. The multiphase pump is configured to handle some amount of gas leaking around the pig train. A choke system may allow sea water to enter the flowline, thereby lowering the gas volume fraction (GVF) and preventing the GVF from exceeding the ability of the multiphase pump. For deeper water applications, a second pump may be provided in series that may be a single pump if positioned downstream of the multiphase pump.

A top side-less pump system for managing multiphase fluid includes a pump subsystem having a suction and a discharge. A first gas liquid extraction unit has a multiphase fluid inlet and a liquid outlet. The liquid outlet is coupled to the suction for providing a liquid rich fluid to the bearing lubrications. An ejector is coupled to a gas outlet of the main gas liquid extraction unit to receive a gas rich fluid. A second gas liquid extraction unit is coupled to an outlet of the ejector. A water based lubrication liquid unit is coupled to the inlets of the pump and, after being energized at higher pressure, injected into the bearings through built in lubrication and cooling passages.

The invention relates to electric robots, and more particularly to a electric robot for pool cleaning, including a base with a water inlet channel, a volute assembly and a motor assembly capable of outputting positive and negative torques; where the volute assembly is rotatably provided above the base and communicates with the water inlet channel; the volute assembly includes a casing and an impeller assembly provided therein; a water outlet is provided on a side of the casing, and an water outlet channel is provided inside the casing to allow water to flow through the impeller assembly; the motor assembly is provided on the base, and connected with the impeller assembly through an output shaft; and an upper end surface of the base is provided with a limit structure for limiting a rotation angle of the volute assembly.

A pump system comprises a bilge pump powered by an electric motor and a controller controlling the electric motor. The controller is configured to determine if the pump system is malfunctioning. In response to determining that the pump system is malfunctioning, the controller is configured to control the electric motor according to a predetermined routine configured to rectify the malfunction. A pump system comprises a first bilge pump including a first electric motor configured to power the first bilge pump and a first controller controlling the first electric motor and a second bilge pump including a second electric motor configured to power the second bilge pump and a second controller controlling the second electric motor. The first and second controllers are in signal communication with one another.

This pump includes a computing device, with a vibration waveform analysis section and a memory, the analysis section being designed to control the motor, by comparing a vibration waveform received from the vibration sensor with vibration waveforms saved in the memory.

A stick pump assembly includes a tube having a first end, a second end, and an axis extending through the first and second ends. The tube accommodates fluid to flow therethrough. The stick pump assembly also includes a pump including a motor and an impeller. The pump has an inlet adjacent the first end and in fluid communication with the tube. The stick pump assembly further includes a handle having an outlet adjacent the second end and in fluid communication with the tube. The handle includes a receptacle configured to receive a battery pack. The stick pump assembly also includes a filter assembly supported by the pump and in fluid communication with the inlet. Fluid flows into the stick pump assembly though the inlet, around the motor, through the tube, and out of the stick pump assembly through the outlet.

Some particular preferred embodiments relate to the field of pumping stations for sewage and wastewater with submersible pumps mounted in the bottom of the wells. To allow easy cleaning and maintenance of the pumps without getting in contact with the dirty water the solution is a system for easy lifting of the pump out of the well and lowering the pump again with an auto coupling.

A method of lifting fluid by an electrical submersible pump (ESP) assembly in a wellbore. The method comprises positioning a first ESP component above the wellbore, wherein the first ESP component comprises a first drive shaft; positioning a second ESP component above the first ESP component, wherein the second ESP component comprises a second drive shaft; coupling a tethering assembly at a first end to an end of the first drive shaft proximate to the first flange; passing the tethering assembly through a coupling shell; coupling a second end of the tethering assembly to an end of the second drive shaft proximate to the second flange, wherein the tethering assembly is coupled slidingly to the first drive shaft or to the second drive shaft; coupling the first drive shaft to the second drive shaft by the coupling shell; and coupling the first flange to the second flange.

A subsea long-distance power-transmission system comprises an electrically driven pumping station for producing a flow of pressurised working fluid and an electricity generating station having an electrical generator coupled to a fluid-powered machine. A supply duct extends across the seabed between the pumping station and the generating station, that duct being arranged to convey the flow of working fluid from the pumping station to power the machine. Electric power is supplied to the pumping station from an electric power source, such as a national power grid, and is supplied from the generator to an electric power consumer far distant from the power source, such as a subsea oil and gas installation.

Some particular preferred embodiments relate to the field of pumping stations for sewage and wastewater with submersible pumps mounted in the bottom of the wells. To allow easy cleaning and maintenance of the pumps without getting in contact with the dirty water the solution is a system for easy lifting of the pump out of the well and lowering the pump again with an auto coupling.