A kind of freezing-inhibiting low salinity water (H20) seabed streamline low salinity water injection (7) includes providing streamline and control pressurer system, it may include that high-pressure pump (6) and a pair of of pressure are closed in valve (10,11), its keep improve Fluid pressure streamline (7) entire low salinity water injection operation and the shut-in time section, in the period streamline (7) remain full of pressurization non-frozen low salinity water (H20) those can be about -2 degrees Celsius in temperature.
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