Den Norske Stats Oljeselskap A.s.

Statoil

Den Norske Stats Olkeselskap

Knut V Horvei

Jonas S Sandved

Valve arrangement

Converter group and pressure converter for use therein

Pressure converter

Rotatable valve having upper and lower parts

Ball valve and actuator for operating valves and the like

A ceramic chromium oxide coating produced by applying a conventional chromium oxide coating to a substrate and wholly or partly fusing the conventional chromium oxide coating by subjecting the chromium oxide coating to laser irradiation. The chromium oxide coating can optionally contain silica and/or alumina and less than 1 percent of metal. The chromium oxide coating can be employed for the internal and/or external protection of components in equipment for production and transport of oil and gas under water.

Ceramic coating

Shut-down valve

Apparatus for maintenance of ball valve

Mechanism for locking of a cover againt a flange

A ball valve device for subsea applications, capable of being dismantled for inspection and maintenance without disrupting normal operations of the pipeline and without causing leakage into or out of the pipeline is disclosed. The ball arrangement of the valve has an upper ball member (3), and a lower ball member (4) in which its upper ball member (3), includes the main packings of the valve. The lower ball member (4) includes two axial withdrawable sleeves (13). When the valve is open, the sleeves (13) can be withdrawn outwardly for intervention with guiders in the valve housing (1) and thereby form a tight, continuous passageway which extends from one of the openings in said valve housing (1) to the second opening in said valve housing (1). The axial withdrawable sleeve (13) can be moved inwards to a position where it stands free from its other guiders when said ball arrangement rotates during closing of said valve.

Ball valve

Growing community of inventors

Sandnes, Norway

Knut V Horvei