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cesium formate

1. n. [Drilling Fluids]

A neutral to slightly alkaline salt of cesium hydroxide and formic acid having the formula HCOOCs+. It is extremely soluble in water. An 82 wt% cesium formate solution has a density of 2.4 g/cm3 [19.9 lbm/galUS]. It has shown favorable health, safety, and environmental (HSE) characteristics in laboratory tests and has applications as a drill-in, completion, or workover fluid. Cesium formate can be mixed with less expensive potassium formate to make clear brine mixtures with a density range from 1.8 to 2.4 g/cm3. Formates have temperature stability in the range of  190 degC [375 degF], depending on the duration of exposure to such a temperature.

See: cesium acetatecompletion fluiddrill-in fluidHSEzinc bromide

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