Hydrotest fluids

Preservation of hydrotest fluids. The use of biocides in hydrotests presents some unique challenges to the oilfield service companies. They have to balance the need to protect the pipeline from microbial attack, while also being concerned about the potential of negative environmental effects that may arise for a spill or discharge of biocide-containing water. The choice of a hydrotest biocide depends mainly upon the length of time the water will be kept in the pipe, the environmental fate profile of the biocide, and also whether the biocide can be easily deactivated. The most commonly used biocides in hydrotests are glutaraldehyde, THPS, and quaternary ammonium compounds. 

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