Wells – With heating – refrigerating or heat insulating means – Heater surrounding production tube
Reexamination Certificate
2006-04-25
2006-04-25
Beach, Thomas A (Department: 3671)
Wells
With heating, refrigerating or heat insulating means
Heater surrounding production tube
C166S057000, C166S367000, C166S272100
Reexamination Certificate
active
07032658
ABSTRACT:
Methods and apparatus for installing electrically heated composite umbilicals within subsea flowlines containing produced hydrocarbons as immersion heaters to prevent waxes and hydrates from forming within the subsea flowlines that could block the flowlines. The electrically heated composite umbilicals may be installed, or retrofitted, into existing subsea flowlines. Such retrofitted electrically heated composite umbilicals provide an alternative for previously installed, but failed, permanent heating systems. A hydraulic pump installed on the distant end of an electrically heated composite umbilical also provides artificial lift for the produced hydrocarbons. Other electrically heated umbilicals used as immersion heaters are described. Such immersion heater systems may be removed from the well, repaired, and retrofitted into flowlines without removing the flowlines. Near neutrally buoyant electrically heated umbilicals are described which may be installed great distances into flowlines. Different methods of deploying the electrically heated umbilicals are also provided.
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Chitwood James E.
Crossland William G.
Dekle Robert L.
Skerl Damir S.
Vail III William Banning
Beach Thomas A
Smart Drilling and Completion, Inc.
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