US Patent 11873688 Centralizer with opposing hollow spring structure

A centralizer for a downhole probe disposed within a pipe, the centralizer having an elongated, primary tubular member that is polygonal in cross-section such that the wall of the tubular primary tubular member is formed with at least three sides. Each side has two adjacent inwardly extending ridges positioned between two outwardly extending ridges. The inwardly extending ridges each extend inward to an inner diameter to engage the outer diameter of a sonde and the outwardly extending ridges each extend outward to an outer diameter to engage the inner diameter of a pipe.