Institute Francais Du Petrole

Institut Francais Du Pe'trole

Regis Vilagines

Christian Bratu

Florent Spettel

Multiphase fluid pumping or compression device comprising at least one group of blades (Gj) including for example a first (A.sub.1j) and a second (A.sub.2j) blade of tandem design whose geometric characteristics are determined to optimize the compression or the pumping of a multiphase fluid comprising at least one liquid phase and at least one gas phase.

Multiphase fluid pumping or compression device with blades of tandem

The invention relates to a pumping system for applying a sufficient pressure increase to multiphase effluents for them to be conveyed from a source such as an petroleum producing well to a remote destination point. To improve pump function and render management of effluent transfers more flexible, the system has a loop (7) for recycling a fraction of the multiphase effluents leaving pump (1) to the inlet thereof, comprising preferably a tap (5) such as a T formed to decrease the volumetric ratio GLR of the recycled effluents. A regulator such as a control valve (8) and a buffer tank and an element (9) such as an ejector-mixer are interposed in the loop to use part of the energy of the effluents tapped off. The invention has application for offshore pumping facilities.

Multiphase pumping system with feedback loop

The invention is a device for providing one of compressing and pumping of a multiphase fluid including at least one liquid phase and at least one gaseous phase. The device includes at least one hollow casing having at least one inlet port and at least one outlet port for the fluid. At least one rotor is rotated and mounted inside the casing having an axis OX in a hub. The at least one rotor comprises at least one impeller or at least one diffuser having at least two vanes G.sub.j having a first blade A.sub.1j and a second blade A.sub.2j wherein geometric characteristics and position of at least one of the first blade A.sub.1j and at least one second blade A.sub.2j in relation to each other is determined according to at least one parameter.

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Vernaison, France

Regis Vilagines