Cesium Formate Fluids

The formate salts of alkali metals are very soluble in water and form brines of very high density and low crystallization temperatures. Cesium is the most soluble of the three formate brines, the others being Sodium and Potassium Formate. Formula = CsCOOH

Cesium Formate fluids are ideal as base fluids in a number of industries. These non- corrosive organic monovalent fluids offer a number of performance benefits over traditional brines.
Higher Density: Cesium formate fluids can reach 2.3 sg (19.2 ppg) at saturation. Cesium formate is 83% w/w soluble in water. Traditional divalent chloride and bromide brines are not as soluble, +/- 50% w/w.
Lower Viscosity: Cesium formate fluids have very low viscosities. They range from 5 cps at ambient temperatures to 1 cps at moderate wellbore temperatures.
Solids Free: Cesium formate fluids are solids free. Weighting agents, like barite, are not needed to reach a desired fluid density.
Environmentally Responsible: Cesium formate fluids have been awarded a grouping of "E" by the U.K. Department of Trade and Industry, the most favorable rating.
Non-Damaging: Cesium formate fluids are monovalent and will not interact with reservoir waters to form precipitates. Traditional divalent brines can cause damage through this mechanism.
Thermally Stable: Cesium formate fluids have been field tested in one of the most severe HPHT environments in the North Sea. Cesium formate fluids have performed without problem in numerous wellbore operations at 405 0F.
Lubricious: Cesium formate fluids exhibit lubricity characteristics that are equal to or exceed that of oil muds. Coiled tubing field trials have proven these characteristics.

Cabot Specialty Fluids (CSF), 25025 I-45 North, Suite 385, The Woodlands, TX 77380. Tel: 281-298-9955; Fax: 281-298-6190.