Statoil Petroleum As

Equinor Energy As

Arne Valle

Haavard Aakre

Vidar Mathiesen

Tor Kindsbekken Kjeldby

Magnus Nordsveen

Håvard Eidsmoen

Havard Eidsmoen

A system for surge protection of a riser adapted to transport gas from a hydrocarbon production well or for surge protection in a well, the system comprising: a flexible tubing, wherein a portion of the flexible tubing extends into the riser or into the well and wherein the tubing terminates inside the riser or inside the well; a pressure control system arranged to create a pressure differential within the flexible tubing such that liquid is drawn from the riser or the well into the flexible tubing if liquid is present in the riser or the well; wherein the length of said portion of the flexible tubing is variable depending on the amount of liquid drawn into the flexible tubing.

Riser surge protection system

The present invention relates to a method of improving flow stability for a multiphase fluid flowing through a tubular element (), comprising arranging a flow control device () along a flow path (F) through the tubular element (), the flow control device () comprising a housing (), an inlet () arranged on an upstream side of the control device (), an outlet () arranged on a downstream side of the control device (), and a movable body () provided within the housing () along an internal flow path () through the control device () from the inlet () to the outlet (), the body () being arranged such that changes in velocity and/or properties and/or composition of the fluid flowing along the internal flow path () result in changes to the forces acting on the body () as a result of the Bernoulli principle, thereby adjusting the flow of fluid through the control device ().

Flow control device and flow control method

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Porsgrunn, Norway

Arne Valle