Subsea pump and system and methods of control

The invention provides a subsea or downhole pump comprising an inlet and an outlet, a multiphase fluid flow entering the inlet can have a variation in the GVF- gas volume fraction-of the fluid, distinctive in that the pump includes or is operatively coupled to devices for normal pump control as the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Robin Slater, Gunder Homstvedt, Marcelo Santos
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS HEATING LIGHTING MECHANICAL ENGINEERING MINING NON-POSITIVE DISPLACEMENT PUMPS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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Beschreibung
Zusammenfassung:	The invention provides a subsea or downhole pump comprising an inlet and an outlet, a multiphase fluid flow entering the inlet can have a variation in the GVF- gas volume fraction-of the fluid, distinctive in that the pump includes or is operatively coupled to devices for normal pump control as the GVF varies, said devices consisting of: a transmitter for electric pump current and a transmitter for at least one of: pump speed, pump frequency or pump voltage,and a controller acting to reduce the pump speed when the measured pump current decreases and to increase the pump speed when the measured pump current increases. A subsea pump system and methods for control of the pump and system, respectively, are also provided with the invention.