APPARATUS AND METHOD FOR OPERATING A SUBSEA COMPRESSION SYSTEM IN A WELL STREAM
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United States of America Patent
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Jan 2, 2014
app pub date -
Jun 27, 2013
filing date -
Jun 27, 2012
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Abstract
A method of operating a subsea compression system in a well stream, the subsea compression system comprising a compressor and an electromotor driven pump, wherein the compressor is configured to compress and the pump is configured to pump liquid from the compression system. The method comprises providing a gas return line connecting a downstream side of the compressor with an upstream side of the compressor, arranging a turbo-expander unit in flow connection with the gas return line, connecting the turbo-expander unit drivingly to a generator configured to charge a battery, operating the generator in response to recycling of compressed gas through the turbo-expander unit, and operating the pump on electrical power supplied from the battery.
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