Complex sentence: A DOWS system is installed at the bottom of an oil well, it separates oil and water in the wellbore the oil rich stream is brought to the surface while the water rich stream is pumped into an injection formation without ever coming to the surface.
Split into simpler sentences: A DOWS system is installed at the bottom of an oil well, it separates oil and water in the wellbore. The oil rich stream is brought to the surface while the water rich stream is pumped into an injection formation without ever coming to the surface.