The paper will present the Tommeliten Subsea Development Project with emphasis on the X-mas tree and control systems. The experience from the test phase is also highlighted.

The Subsea development of the Tommeliten field was interesting and special with regard to utilizing an existing platform system with a different operator/-owner for processing and distribution. It is also one of the first fields being developed with a 10,000 psi X-mas tree system.

The trend of activities in the North Sea is towards smaller and less expensive development solutions.

The field is marginal and was developed with an economically sound solution.

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