Treatment of cesium-containing fluids

Method of upgrading a cesium containing solution comprising passing said cesium containing solution through a cavitation device to remove water therefrom, thereby obtaining a solution containing a higher concentration of cesium.

Method of treating an oilfield well penetrating an earth formation comprising introducing into said well an oil well fluid containing cesium, whereby said fluid becomes diluted in or by said formation so that it contains less cesium in concentration, circulating said fluid from said well, and passing at least a portion of said fluid through a cavitation device to remove_moisture therefrom and produce a regenerated fluid containing a higher concentration of cesium by weight in said fluid.

Method of processing a used oil well fluid containing cesium comprising (a) optionally filtering said used oil well fluid, (b) passing said used oil well fluid through a heat exchanger to increase its temperature utilizing waste heat from an engine, (c) powering a cavitation device with said engine, (d) passing said oil well fluid through said cavitation device to further increase the temperature thereof, (e) passing said used oil well fluid into a flash tank to separate steam and vapor from said used oil well fluid and to obtain a concentrated fluid, (f) removing at least a portion of said concentrated fluid from said flash tank, and reusing said at least a portion of said concentrated fluid as a source of cesium in an oil well fluid.

Method of achieving a desired crystallization temperature in a used oil well fluid containing cesium comprising passing said used oil well fluid through a cavitation device, thereby obtaining a rejuvenated oil well fluid having a concentration of cesium greater than that of said used oil well fluid, and adding at least one salt to said rejuvenated oil well fluid in an amount calculated to obtain a desired crystallization temperature in said rejuvenated oil well fluid.