Institut Francais Du Pe'trole

Moteurs Leroy-Somer

Institute Francais Du Petrole

501 Institut Francais Du Petrole

Marcel Arnaudeau

Pierre Morin

Michel Galais

Christian Sardain

Philippe Rousset

Jean Fouin

Christian Wittrisch

Maurice Cessou

Eric Vandenbroucke

Daniel Gabryelczyk

Pietrus Verschure

A system for compressing a multi-phase fluid made up of at least one gaseous phase and at least one liquid phase, the system having at least one pair of pumping elements. The system includes an axial-flow pump P1 and a centrifugal pump P2 arranged after the axial-flow pump P1. The two elements are linked by an element which adjusts the fluid from the axial-flow pump to optimize the effect of the centrifugal pump.

Axial-flow and centrifugal pumping system

The present invention relates to a device to compress a multiphase fluid such as petroleum effluent comprising a liquid phase and a gaseous phase and a method to use the device. The device comprises a housing (1), an impeller having an inlet section and an outlet section. The impeller comprises an axisymmetric hub (28) with an axis Ox and a number n of blades rotating around the axis. The blades have a leading edge (C1, C2) and a trailing edge (C'1, C'2). The fluid enters the impeller va the inlet section (41) and leaves via the outlet section (42). The axis is orientated in the direction of advance of the fluid. The number of rotating blades (29, 30) is equal to or greater than 2. At least one channel or passage is defined by two successive blades (29, 30) whose orthoradial section S(x) is of the form, within 5% and preferably within less than 3%:

Pumping or multiphase compression device and its use

Device, in particular for regulating and reducing the fluctuations in the composition of a polyphasic flow including at least one liquid phase and one gaseous phase. This device comprises a container for separating said phases and at least one admission opening for the polyphasic mixture, as well as means for extracting the content of the container. The extraction means (3, 7, 40, 41) extend into said container (2, 39, 56) in such a manner that during normal operation, they extend through the liquid-gas interface (6). Said extraction means include extraction openings (4, 16, 19, 50, 51) arranged on both sides of the interface in normal operation; the sum of the throughflow sections of said openings, estimated from a reference position on at least a portion of a vertical axis, varies as a function of the slope, considered on said axis and for said portion, said portion extending during normal operation on both sides of said interface.

Device for regulating and reducing the fluctuations in a polyphasic

This invention comprises a device and method for producing and conveying a diphasic fluid. The method comprises mixing the gas with a liquid to produce a diphasic fluid which is forced into a pipe by diphasic fluid pumping means, the amount of the added liquid depending on the maximum value of the gas-to-liquid volumetric ratio of the diphasic fluid which can be processed by the pumping means. A further refinement is achieved by separating a portion of the liquid phase from the pressurized diphasic fluid and recycling it to the mixing stage. The device comprises means for mixing the substantially gaseous fluid with sufficient liquid to form a diphasic fluid having the predetermined gas-to-liquid ratio for the pump. The means for mixing also includes means for equalizing the pressure of the gas and liquid prior to mixing and conveying through the pipe.

Method of conveying an essentially gaseous fluid through a pipe

Process and apparatus for measuring two phase flow

A method for producing a flow of fluid comprised of at least phases from at least two primary flowing fluids, one of which has at least one liquid phase, and the other at least one gaseous phase, wherein the two primary fluids flow out respectively through one and another orifice, both of which may be streamlined, then a multiphase mixture is produced because the various flows are made to flow out through a third orifice and the channel sections of the orifices are adjusted in such a way so as to regulate at least one of the rate and pressure of the different flows, whereby a homogeneous multiphase flow is produced while minimizing the loss in energy of the different fluids.

Liquid-gas ejector device and method used to produce a diphasic flow

Feed device for a two-phase fluid pump and a hydrocarbon producing

A process for performing a series of hydrodynamic functions or operation on a flow of fluids comprised of at least two phases includes the following steps: separating the fluid phases that comprise the initial flow; reducing the turbulence of the flows of each of the fluid phases which have been separated from each other; and recombining the fluid phases to form a new polyphasic flow with a predetermined structure.

Process and device for performing a series of hydrodynamic functions on

A method for ensuring fluid-tightness is applicable to a submersible motor for operation under conditions of total and permanent immersion, especially in oil wells and geothermal boreholes. The emergent end of the drive shaft of the motor is fitted with a rotary packing-gland. The motor casing is filled with oil which is circulated via an axial duct of the drive shaft, the impulse being produced by a disk pierced by radial ducts. A second circuit constituted by a system of ducts including radial ducts comes into contact with the packing-gland which is at overpressure with respect to the external medium. This results in a controlled leakage flow between the two portions of the packing-gland.

Device for providing fluid-tightness of a submersible motor and a motor

A motor pump set having two coaxial shafts is provided with a fluid circuit for protecting the rotary packing-gland against any ingress of solid particles such as sand. Pumped fluid is withdrawn from an intermediate space of the pump and returned upstream via a duct within the pump shaft in order to lubricate the bearings as it passes. The fraction of the fluid stream which is discharged from the last bearing flows in the vicinity of the packing-gland and is driven through radial discharge ducts under the action of centrifugal force.

Motor-pump set for boreholes and a method of protection relating thereto

A tubular centrifugal separator for immiscible fluids of different specific gravities comprises a tubular body provided with at least one concentric internal partition and fed at one end with the mixture of fluids to be separated. Included are also, at least two separate means for driving the fluid in rotation, the second of which is placed downstream from the end of an internal partition inside the tubular body. Extraction ducts are provided to withdraw the separated fluids and means to feed back remaining fractions of the mixture.

Method for separating immiscible fluids of different specific gravities

A tubular centrifugal separator for immiscible fluids of different specific gravities comprises a tubular body provided with at least one concentric internal partition and fed at one end with the mixture of fluids to be separated. Included are also at least two separate means for driving the fluid in rotation, the second of which is placed downstream from the end of an internal partition inside the tubular body. Extraction ducts are provided to withdraw the separated fluids and means to feed back remaining fractions of the mixture.

Device for separating immiscible fluids of different specific gravities

A mooring station and transfer terminal for offshore hydrocarbon production is provided, comprising a coaxial riser linking underwater production and safety manifolds to surface lines. An underwater connector and quick release means are provided to facilitate rapid connection and disconnection of the riser pipes.

Transfer terminal for offshore production

This device relates to a pump for diphasic fluids and comprises an impeller having a hub which carries blades of a special design. The intersection of the outer surface of each blade with a cylindrical surface coaxial with the hub is a line whose angle of inclination, relative to a plane perpendicular to the hub axis, has a substantially constant value over about one third of the hub length. Furthermore, the intersection of the inner surface of each blade with said cylindrical surface forms a curve, or profile, which can be divided into four successive portions with different law of variations of the angle of inclination of this profile relative to a plane perpendicular to the hub axis.

Pumping device for diphasic fluids

This invention comprises a device and method for producing and conveying a diphasic fluid. The method comprises mixing the gas with a liquid to produce a diphasic fluid which is forced into a pipe by diphasic fluid pumping means, the amount of the added liquid depending on the maximum value of the gas-to-liquid volumetric ratio of the diphasic fluid which can be processed by the pumping means. A further refinement is achieved by separating a portion of the liquid phase from the pressurized diphasic fluid and recycling it to the mixing stage. The device comprises means for mixing the substantially gaseous fluid with sufficient liquid to form a diphasic fluid having the predetermined gas-to-liquid for the pump. The means for mixing also includes means for equalizing the pressures of the gas and liquid prior to mixing and conveying through the pipe.

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Paris, France

Marcel Arnaudeau