Deepwater: Seafloor systems push the offshore envelope ///
Subsea oil/water separation has been used for years to lighten high-watercut wellstreams such as at the mature Tordis field in the North Sea, and pumps on the seafloor—both single-phase electrical submersible pumps (ESPs) and multiphase boosting systems—have helped lift hydrocarbons that low pressure or deep water would otherwise put beyond reach.
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