Integrity issue

A 24 inch drilling mud line was suffering from external corrosion. It was proposed to use Futurewrap composite repairs over 4 defects to reinstate the integrity of the pipework.

Design 

The design of the Futurewrap repair was according to ISO 24817.  The design approach was for pipework strengthening and leak sealing. The design parameters were; internal pressure 9.2 bar, temperature 500C, design lifetime 10 years, slot through wall defect length of 50 mm. The repair design resulted in a thickness ranging from 6 to 12 mm (6 to 14 layers) of Futurewrap Glass/LT composite repair with an axial lengths from 650 to 900 mm.

Installation

The installation steps are shown in the photographs. The pipework was depressurised. The surface preparation was to ST3. Full QA/QC measurements were made to demonstrate that the Futurewrap repair was applied in accordance with ISO 24817.

Summary

A 24 inch drilling mud line was repaired using Futurewrap Glass/LT composite repair.  The repairs were completed within 8 days allowing the pipework to be re-pressurised returning the pipework to its original integrity.