Electrically heated flowlines tie-back two subsea fields

Click here to enlarge imageShell Exploration & Production Co. announced in mid-September its plans to develope two more deepwater Gulf of Mexico discoveries, Oregano and Serrano (Fig. 1). The developments include the world's first flowlines used as electric conductors for heating, Shell said. A non-metallic composite insulation is used between the pipe-in-pipe flowlines.Shell developed this application at its Westhollow Research Center, Houston. Steve Sears, Shell's subsea development manager, said the electrically heated lines eliminate the need for two separate flowlines, required for pigging, and the need for injecting methanol for controlling hydrates. He estimated Shell wil...

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