Nuovo Pignone Srl

Nuovo Pignone Spa

Nuovo Pignone Tecnologie Srl

Vetco Gray Scandinavia As

Lorenzo Bergamini

Vincenzo Pietanza

Donato Antonio Ripa

Tommaso Capurso

Vittorio Michelassi

Giuseppe Sassanelli

Matteo Berti

Massimo Camatti

Sergio Palomba

Giacomo Landi

Marco De Iaco

Emanuele Rizzo

Fabrizio Milone

Alessio Capanni

Dante Tommaso Rubino

Erik Mele

Nicola Banchi

Francesco Gamberi

Marco Torresi

Andrea Masi

Stefano Bresciani

Michael Catanzaro

Marco Cipriani

Marco DeIaco

Tommaso Cappiello

Guido Masi

Marco Deiaco

A double suction impeller is disclosed. In at least one embodiment, the impeller is configured for centrifugal pumps and hydraulic power recovery turbines. The impeller's flow-path arrangement comprises inter-blade channels, intersecting each other at the impeller's outer diameter and defining a variable cross section shape, so that the equivalent number of blades is at least doubled with respect to a conventional configuration obtained by the coupling of two single suction impellers and an improved control over the velocity of the flow within the inter-blade channels is achieved.

High efficiency double suction impeller

A system and modular compressor for raising the pressure in production gas is disclosed, wherein in a set of compressor modules each second module is a rotor module carrying an impeller driven in rotation relative to an adjacent stationary module, a rotor module and a stationary module in combination providing a compressor stage in which production gas is accelerated through a flow duct that passes an interface between the rotor module and the stationary module, wherein at the interface at least one bearing for axial and/or radial load is provided for journaling the rotor module on the stationary module. The at least one bearing is a gas bearing, wherein a passage is arranged in the stationary module to lead an extracted portion of production gas at raised pressure from the compressor to the gas bearing(s).

Modular compressor with gas bearings and system for raising the pressure in production gas

A seal for a gap between an outer and an inner cylindrical surface, coaxial with a central axis in common and arranged to rotate reciprocally, the seal comprises a plurality of plate elements stacked onto one another to define a ring between the outer and inner cylindrical surfaces, wherein each plate has a concave and a convex side, the convex side of each plate element being adjacent to the concave side of the next plate element.

Seal for a gap between an outer and an inner cylindrical surface

A seal assembly for a piston rod including an external seal and an internal seal. The external seal is adapted to be placed on a piston rod facing an external environment, the internal seal is adapted to be placed on the rod facing the cylinder associated to the piston. The external and internal seals define in cooperation with each other a chamber for the containment of barrier fluid. Such chamber has an inlet for the intake of barrier fluid and an outlet for the exit of barrier fluid. The assembly also comprises a recirculation circuit for the barrier fluid, which is placed in fluid communication with the inlet and the outlet to recirculate the barrier fluid from the outlet back to the inlet and a pressurizer device configured to be installed coaxially with the piston rod providing the chamber with a positive pressure with respect to the process environment.

Seal assembly for a piston rod

A turbo machine comprising a barrel casing having a cylindrical internal surface defining an internal containment volume, a bundle having a cylindrical shape, adapted to be accommodated into the internal containment volume, a cylindrical cover connected to the bundle to close the internal containment volume and hold the bundle inside the barrel casing, a split shear ring adapted to fix the barrel casing with the cylindrical cover wherein the external cylindrical surface of the cylindrical cover and the cylindrical internal surface of the barrel casing are provided with a first circumferential groove and a second circumferential groove adapted to accommodate the shear ring and wherein the first grooves is adapted to completely accommodate the cross section of the split shear ring.

Barrel turbo-machine comprising retracting shear

A seal assembly for a valve stem comprises an external seal placed on a valve stem facing an external environment; an internal seal placed on the valve stem facing a process environment; the external and internal seals define a chamber for the containment of barrier fluid; the chamber has an inlet configured to be placed into fluid communication with a source of barrier fluid; a detector of the amount of barrier fluid; a pressurizer device for providing the chamber with a positive pressure with respect to the process environment; the pressurizer device is configured to be installed coaxially with the valve stem.

Seal assembly for a valve stem

A multistage turbomachine is disclosed, comprising a casing with a fluid inlet and a fluid outlet and a plurality of stages arranged in the casing. A flow path extends from the fluid inlet to the fluid outlet through the sequentially arranged stages. Each stage is comprised of a rotating impeller and an electric motor embedded in the casing and arranged for rotating the impeller at a controlled rotary speed. Each electric motor comprises a motor rotor, arranged on the impeller and integrally rotating therewith, and a motor stator stationarily arranged in the casing. Pairs of sequentially arranged impellers are configured for rotation in opposite directions.

Multistage turbomachine with embedded electric motors

A control valve comprising a cylindrical hollow trim defining an inner bore extending along an axis between a first opening and a second opening, the first opening defining an inlet of the valve, the trim comprising a first outer cylinder extending along the axis and comprising a first plurality of radial through holes defining an outlet, a second cylinder, housed in the first cylinder and coaxial, the second cylinder comprising a second plurality of radial through holes, the holes of the first plurality being smaller and in greater number than the holes of the second plurality, for each hole of one of the first and second cylinders the projection along a radial direction on the other of the first and second cylinders being spaced from each hole of the other of the first and second plurality a plug sized to fit inside the bore and slidably movable along the axis.

Multistage trim for control valves

A back-to-back centrifugal pump comprising a pump inlet, a pump outlet, a pump shaft, a set of first stages, and a set of second stages in a back-to-back arrangement. Between the two sets of stages an intermediate crossover module is arranged. The first and second sets of stages comprise respective first outer diaphragms and second outer diaphragms. The outer diaphragms and the intermediate crossover module are stacked together and form a pump casing. The intermediate crossover module forms at least one axial transfer channel between the two sets of stages, and a fluid connection between the set of second stages and the pump outlet. The second diaphragms comprise each at least one peripherally arranged through aperture. The through apertures are aligned to form at least one passageway, which fluidly connects the axial transfer channel with a most upstream one of the impellers of the second set of stages.

Back-to-back centrifugal pump

A valve comprising a valve body with a fluid inlet, a fluid outlet, an inner cavity and an outer cavity at least partly surrounding the inner cavity. The outer cavity is in fluid communication with the fluid inlet and with the inner cavity and the inner cavity is in fluid communication with the fluid outlet. A flow splitter is provided, forming at least two flow passages in the outer cavity.

Control valve for gas and liquids

In one embodiment, a turbomachine for imparting energy to a multiphase fluid is provided. The turbomachine comprises a casing having an inlet and an outlet; an axial stage part comprising at least one axial stage; a mixed-flow stage part comprising at least one mixed-flow stage fluidly connected to the axial stage part; and a centrifugal stage part comprising at least one centrifugal stage fluidly connected to the mixed-flow stage part. The axial stage is defined by an angle between an axial impeller outlet flow and an axis parallel to a rotational axis of the shaft having a value between 0&#xb0; and 5&#xb0;, the mixed-flow stage by an angle having a value between 5&#xb0; and 80&#xb0;, and the centrifugal stage by an angle having a value between 80&#xb0; and 90&#xb0;.

Turbomachine with mixed-flow stage and method

Method and system for compressing a fluid in a gas phase and for pumping the fluid in a dense phase. The system includes a compressor part having an impeller; a compressor part inlet that receives the fluid in the gas phase; a compressor part outlet that provides the fluid in the gas phase; a temperature changing device that changes a phase of the fluid; a pump part having an impeller; a pump part inlet that receives the fluid in the dense phase from the compressor part outlet; a pump part outlet that outputs the fluid in the dense phase from the system; a single bull gear configured to rotate around an axial axis with a predetermined speed; plural pinions contacting the single gear bull and configured to rotate with predetermined speeds, and a pump shaft configured to rotate the at least one impeller of the pump part.

Single system with integrated compressor and pump and method

An integrated high-pressure compression unit for a process fluid that includes at least a first compression device able to compress the process fluid from a essentially gaseous initial thermodynamic state to an intermediate thermodynamic state, a second compression device connected mechanically to the first compression device and able to compress the process fluid from the intermediate thermodynamic state to a final thermodynamic state, a motor device able to drive the first compression device and the second compression device, and a pressure casing or housing in which at least the said first and second compression devices are mechanically coupled to each other.

High-pressure compression unit for process fluids for industrial plant and a related method of operation

A gas flow control valve which enables mass flow to be measured using a flow straightener in a valve entry duct, a tube for lengthening the entry duct into the valve, a valve element exit port with suitably radiused edges and a flow stabilizer in the valve exit duct. Upstream and downstream pressure taps are positioned immediately upstream of the flow straightener and downstream of the flow stabilizer respectively. This enables the flow rate to be controlled not by the formulas traditionally used for valve dimensioning, but by formulas derived from more accurate formulas used for calculating mass flow with standard members of a fixed restriction type.

Growing community of inventors

Bari, Italy

Lorenzo Bergamini