Telluric Current Effects on Cathodic Protection Potential Measurements on Subsea Pipelines

Abstract

A method was developed and tested for measuring and subsequently removing telluric Mathematical techniques for separating the telluric current signal from the cathodic curr~nt effects from continuous pipe-to-elec-protection signal are described. The net trolyte potential profile measurements on submerged pipelines located in geomagnetifrom the electric field sites is correlated vessel moving at approximately six' (6) knots.with the potential profile values recorded at The pipe-to-electrolyte potential is recorded the same time.