B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/6, 31/66, 16
B01D 19/00 (2006.01) B01D 19/04 (2006.01) F15D 1/02 (2006.01)
Patent
CA 2040833
ABSTRACT OF THE DISCLOSURE. Method of preventing formation of hydrates in flowing hydrocarbons under subsea piping of same and a subsea plant for processing of a well flow to prevent hydrate formation. Formation of hydrates is to be prevented in subsea pipelining of hydrocarbon flows by establishing the phase diagram for said flows including a hydrate line. The hydrocarbon flow is separated under a pressure at which light hydrocarbons boil off the liquid phase and enters the gas phase to such an extent that hydrates will not be formed or substantially not be formed in the liquid phase, determined by the composition of the flow of hydrocarbons. The gas phase is processed according to known methods so that formation of hydrates is prevented during the subsequent piping. A subsea plant for processing of a well flow to prevent formation of hydrates during the subsequent piping includes a separator for separation of the well flow into liquid and gas, connection means for connection of the separator to a well flow pipeline, a pump unit including a pump with motor and a compressor unit comprising a compressor with motor, and fluidum carrying lines between the separator and the pump resp. the compressor and a pressure line from pump resp. compressor, connected to the conveying pipelines and a choke device in the well flow pipeline for reduction of the pressure in the separator and a control device for adjustment of the choke device in accordance with the pressure desired in the separator.
Christensen Jan S.
Cotton John L.
Stinessen Kjell O.
Christensen Jan S.
Cotton John L.
Kvaerner Subsea Contracting A/s
Perley-Robertson Hill & Mcdougall
Stinessen Kjell O.
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