Onesubsea IP UK Limited

Åsmund Valland

Hans Fredrik Kjellnes

Audun Magne Askeland

Helge Dale

Knut Harald Klepsvik

Marius Askevold

Joakim Almqvist

Thomas Bucher-Johannessen

Erik A Torbergsen

Per Gunnar Grimstad

A contra-rotating compressor includes a first shaft assembly disposed in a housing, the first shaft assembly including an outer shaft, and a first plurality of impellers coupled to the outer shaft, wherein the outer shaft includes a final stage that includes a final impeller of the first plurality of impellers. The compressor further includes a second shaft assembly disposed in the housing and rotatable about the longitudinal axis that has a second plurality of impellers, a first pair of annular seals between the final stage and an inner surface of the housing that are configured to permit relative rotation between the final stage and the housing, and a third annular seal positioned between the outer surface of the final stage and an inner surface of the second shaft assembly that is configured to permit contra-rotation between the final stage and the second shaft assembly.

Thrust-balancing wet gas compressor

In rotating machine having a vertically oriented rotating shaft, a static magnetic force is used to simulate rotor weight and create the desired bearing preload. By installing a magnet the gravity based preload on the shaft journal bearings of a horizontal machine can be simulated for a vertical shaft. This can increase rotor stability, reduce the machine's vulnerability to hydraulically induced imbalance forces and give a more smooth transition through various shaft speeds.

Magnetic preloading of bearings in rotating machines

A subsea system is configured to inject seawater into a subterranean formation. The system includes a sub-micron filtration module and a plurality of pumps and a plurality of other filtering devices arranged in series.

Subsea fluid injection system

A rotating machine including a rotor operable to rotate about a centerline axis and subjected to axial thrust loads along the centerline axis during operation; a balance piston engaged with the rotor; a stator positioned around the balance piston and the rotor wherein a fluid passageway extends between the internal face of the stator and the external face of the balance piston; the fluid passageway including at least one cavity. A balance piston for a rotating machine including at least two segments arranged with a shift in diameter between each other.

Growing community of inventors

Bones, Norway

Åsmund Valland