TREATMENT OF MICROBIAL-INFLUENCED CORROSION

摘要

Surfaces of well servicing equipment are treated with both a biofilm remover, which can be a mechanical or chemical, and a biocide composition. The biocide composition is designed to be effective to prevent regrowth of bacteria over a period of time in which the equipment is expected to be out of service. Further, the biocide is compatible with the water source available on site for preparation of the biocide composition. The biofilm remover and the biocide composition can be applied or mixed together as a single treatment, if compatible. The biocide is maintained within the equipment or is displaced therefrom, such as with nitrogen and residual biocide composition is effective therein to prevent regrowth. Nitrogen can be maintained within the equipment until put back into service.

主权项

1. A method for minimizing corrosion of surfaces of well servicing equipment, exposed to water containing microbiological agents, and that are inactive for at least an expected period of inactivity, the method comprising:
treating the surfaces by contact with a biofilm remover; and treating the surfaces by contact with an aqueous biocide composition having at least one biocide effective for a known period of time, wherein
when the known period of time is shorter than the expected period of inactivity, repeating the step of treating the surfaces with at least the aqueous biocide composition as many times as a required for the biocide to remain effective for the expected period of inactivity, orwhen the expected period of inactivity is extended to longer than the known period of time, repeating the step of treating the surfaces with at least the aqueous biocide composition as many times as a required for the biocide to remain effective for the extended period of inactivity.