CP jumper system installed on pipeline

A RetroClamp™ was installed on each side of an insulation joint

This Cathodic Protection jumper system provides a CP bridge across the insulation joint installed on the 12” Cobia pipeline extension in the MP-290 field near the mouth of the Mississippi River. The jumper consists of a single RetroClamp™ installed on each side of the insulator flange. RetroClamps™ connected by a pair of 4/0 cables are used to provide electrical continuity across the flange.

Download case study

Before the subsea installation, a pre-retrofit CP survey was taken on the east and west sides of the isolation flange using a Polatrak ROV II probe.After the conclusion of the pre-retrofit survey, the ROV was deployed with the RetroClamps™ attached to the ROV cage. Once the ROV was in position, the clamps were then removed from the ROV cage and installed on each side of the pipeline isolation flange.The RetroClamps™ were installed, and post-retrofit potentials were taken on each RetroClamp™ and the adjacent pipeline using a Polatrak ROV II contact probe to confirm electrical continuity.