National Oilwell Norway As

National Oilwell Varco Norway As

Slawomir Kukielka

David Allen Hill

Kristjan Kristjansson

Steinar Bø Nilsen

Bø Steinar Nilsen

A system on a marine vessel or platform supports a load while allowing heave compensation. The load is supported via a hydraulic actuator. A transformer of the system includes a power source and at least one hydraulic pump/motor, for communicating energy between any two of: the hydraulic actuator; a hydraulic accumulator; and a power source. A valve associated with the pump/motor is switchable during at least one cycle of the pump/motor for selectively providing fluid communication between a drive chamber of the pump/motor and any of the hydraulic actuator, the hydraulic accumulator, and a hydraulic fluid reservoir, via at least one port of the drive chamber, so as to allow a desired displacement of hydraulic fluid from the pump/motor to be obtained.

System arranged on a marine vessel or platform, such as for providing heave compensation and hoisting

An internal blow out preventer for use in a drill string, comprising a housing having an outer valve closure element and where the outer valve closure element is configured to be moved between an open and a closed position, wherein the outer valve closure element is provided with an inner valve closure element that is configured to be moved between an open and a closed position inside the outer valve closure element.

Growing community of inventors

Kristiansand, Norway

Slawomir Kukielka