Abstract: The present invention relates to a process for the oligomerization of C2 to C4 olefin(s) in a gas/liquid or all-liquid oligomerization reactor (c) using a solvent, an oligomerization catalyst and olefin(s), in which compression and premixing are performed between a liquid phase comprising the solvent and a gaseous phase comprising said gaseous olefin(s) by a multiphase pump (b), with partial or total dissolution of the olefin(s) of the gaseous phase in the liquid phase and/or premixing between the two phases, before introduction of the premix obtained into said reactor.

Abstract: The present invention relates to a rotary barrel pump where the pivot connection between barrel (6) and casing (15) is provided by the distinct guide and centering means.

Abstract: The invention relates to a rotodynamic separator (30) for separating a liquid and a gas from a multiphase fluid, notably for use in the petroleum industry. This separator comprises a cylinder (12) freely rotating about an axis (xx), a substantially axial inlet (1) for the multiphase fluid, a liquid outlet (5) and a gas outlet (6). At least one vane assembly (15) arranged along axis (xx), in the direction of circulation (F) of said multiphase fluid, is installed and integral with cylinder (12). Vanes (15) are directed towards axis (xx) of cylinder (12). Furthermore, the inside diameter of vanes (15) decreases progressively, in the part of the separator located upstream from the outlet of the second phase, in the direction of circulation of the multiphase fluid, while remaining larger than the inside diameter of gas outlet (6).

Abstract: The present invention relates to a rotary barrel pump (6) comprising two plates: a mobile plate (2) also driven by drive shaft (5) and a variable-inclination plate (7), the two plates (2, 7) being linked to one another by a pivot connection.

Abstract: A diffuser for a fluid compression device includes at least one vane mounted on a hub. The at least vane includes at least one opening (5) starting at a distance ranging between 10% and 60% of the axial length of the vane. The diffuser can be used in a fluid compression device also including a housing, at least one impeller within the housing, the impeller including at least one vane, the diffuser being arranged within the housing, upstream or downstream from said impeller.

Abstract: The present invention relates to a rotary barrel pump where the pivot connection between barrel (6) and casing (15) is provided by the distinct guide and centering means.

Abstract: The present invention relates to a pump (1) comprising two pumping assemblies distributed symmetrically about a plane perpendicular to the axis of a driveshaft (12), each pumping assembly comprising a cylinder (4, 5), a plate (2, 3), an intake pipe (8, 9) and a delivery pipe (10, 11), the plates (2, 3) of each assembly being connected to one another at said plane of symmetry.

Abstract: The present invention relates to a device for forming a pin spherical joint. Device (10) comprises a cylindrical inner surface (11). The device comprises an outer surface (12) having the shape of a truncated sphere at its ends. According to the invention, inner surface (11) comprises at least one groove (14) or a spline. Furthermore, outer surface (12) comprises at least one crowned spline (13). The invention further relates to a connection between a shaft and a plate with such a device, and to a barrel pump equipped with same.

Abstract: The invention relates to a turbopump (10) comprising a stationary housing (12) comprising a pump (16) with a pump rotor (14) comprising pump vanes (28) and a turbine (20) housing a turbine rotor (18) provided with turbine vanes (44). According to the invention, the turbopump comprises a turbine rotor (18) coaxially arranged around the rotor of the pump (16) in a plane perpendicular to said rotors.

Abstract: The invention relates to a turbopump (10) comprising a stationary housing (12) comprising a pump (16) with a pump rotor (14) comprising pump vanes (28) and a turbine (20) housing a turbine rotor (18) provided with turbine vanes (44). According to the invention, the turbopump comprises a turbine rotor (18) coaxially arranged around the rotor of the pump (16) in a plane perpendicular to said rotors.

Abstract: The present disclosure describes a diffuser (2) for a fluid compression device, comprising at least one vane (4) mounted on a hub. In embodiments of the disclosure, at least one opening (5) is provided in the diffuser vanes (4), in the radial direction.

Abstract: The invention relates to a multiphase compressor or expander impeller (rotor) that can be inserted in a multiphase pump casing. The impeller comprises a blade (Ai) that comprises means (6) for amplifying and distributing clearance flows between the blade (Ai) and the casing (4).

Abstract: Rotodynamic machine for compressing a multiphase fluid comprising at least one gas phase and one liquid phase. The machine comprises at least one mobile wheel 6 rotating around an axis A-A?, mounted in a housing 1, and at least one fixed wheel 7 secured to housing 1. Mobile wheel 6 comprises a hub fitted with at least two blades 20 so as to form at least two channels delimited by hub 8, housing 1 and two of said blades 20. The channels have a centrifugal part. The length of one of the channels defined as the ratio of the volume of a channel to the maximum orthoradial area of said channel, measured in a plane perpendicular to the axis of rotation, ranges between 10 cm and 20 cm, and the ratio of the area of the largest orthoradial channel cross-section to the area of the smallest orthoradial channel cross-section is less than or equal to 3.

Abstract: Rotodynamic machine for compressing a multiphase fluid comprising at least one gas phase and one liquid phase. The machine comprises at least one mobile wheel 6 rotating around an axis A-A?, mounted in a housing 1, and at least one fixed wheel 7 secured to housing 1. Mobile wheel 6 comprises a hub fitted with at least two blades 20 so as to form at least two channels delimited by hub 8, housing 1 and two of said blades 20. The channels have a centrifugal part. The length of one of the channels defined as the ratio of the volume of a channel to the maximum orthoradial area of said channel, measured in a plane perpendicular to the axis of rotation, ranges between 10 cm and 20 cm, and the ratio of the area of the largest orthoradial channel cross-section to the area of the smallest orthoradial channel cross-section is less than or equal to 3.