Patent ID: 6905604
Filing Date: 2005-06-14
Classification: B01D,C02F,Y02A

Abstract:
1. A method of converting feedwater from an oil field to fresh water, including the steps of: disposing at least one reverse osmosis unit directly in a feedwater supply conduit for receiving flow of said feedwater therethrough; conveying, in a non-intermittent manner, through said at least one reverse osmosis unit, feedwater which is at a pressure that exceeds the osmotic pressure for solids dissolved in said feedwater; withdrawing from said at least one reverse osmosis unit a first stream of fresh water as permeate; and allowing a second stream of effluent to continue to flow in said feedwater supply conduit downstream of said at least one reverse osmosis unit, without any recycling of said effluent to said at least one reverse osmosis unit.