Den Norske Stats Oljeselskap A.s.

Statoil Asa

Martin Sigmundstad

Bernt Helge Torkildsen

Harald Linga

Finn P Nilsen

Per H Hanssen

Finn Patrick Nilsen

A method of removing acid gas components from a gas mixture. Certain embodiments of the method involve bringing the gas mixture into contact with a liquid solvent or reagent for the acid gases in a first turbulent contactor and subjecting the gas mixture and liquid to turbulent mixing conditions. This causes the acid gas to be absorbed by the solvent or reagent. The fluid mixture is passed into a second turbulent contactor and subjected to further turbulent mixing conditions causing further acid gas to be absorbed by the solvent or reagent. Optionally the fluid mixture is separated into a gas phase and liquid phase.

Fluid separation system

A sealing arrangement for a swivel ( ) comprising inner and outer mutually rotatable swivel members ( ), wherein the swivel members have respective inner fluid paths communicating with each other through one or more associated annular spaces ( ) at the interface between the swivel members. A first one ( ) of the swivel members on each side of the annular space ( ) is provided with a peripheral groove ( ) receiving a radially displaceable ring element ( ) provided with sealing means ( ) which are arranged for static sealing against the other swivel member ( ) and for dynamic sealing between the ring element ( ) and the side walls of the peripheral groove ( ), so that the first swivel member ( ) apart from the ring elements ( ) is rotatable in relation to the other swivel member ( ).

Sealing arrangement for a swivel

The use of a turbulent contactor to absorb a selected gas component from a gas stream. The invention particularly applies to a method of removing selected gas components from a gas stream which includes: bringing the gas stream into contact with a liquid including a solvent or a reagent for the selected gas component in a turbulent contactor, the contactor including a gas inlet, a liquid inlet, an outlet leading to a venturi passage and a tube extending from the outlet back upstream, the tube being perforated and/or being spaced from the periphery of the outlet; subjecting the gas stream and liquid to turbulent conditions in the contactor thereby causing the gas component to be absorbed by the solvent or reagent.

A method for removing acid gas components from combustion gas and natural gas. The method includes bringing the gas mixture into contact with sea water and subjecting the gas mixture and sea water to turbulent mixing conditions. This causes the acid gas to be absorbed by the sea water. The sea water can be disposed of offshore without any detrimental effect on the environment.

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Hafrsfjord, Norway

Martin Sigmundstad