Page 56: of Marine Technology Magazine (September 2014)

when installing the replacement spool section.

The Weld Seam Removal module utilizes a combination face mill and ID chamfer tool to face mill the weld crown for a smooth sleeve mounting surface, and indexes and pull mills the ID, creating an internal chamfer to prevent pig snagging.

The fi nal prep has the FBE Removal module abrading the

FBE (fusion bonded epoxy) from the pipe with a high speed rotary abrasive disk, utilizing a combination of axial indexes and radial rotation to deliver unlimited axial removal lengths.

The weld crown and FBE removal steps are performed to en- sure a good seal and tight grip of the sleeve connectors.

The CPT system is designed to carry out all severing and preparation work in a single deployment. Apart from tooling the only consumables in the entire operation are the jumper pipe spool section and two pipe connectors. Upon completion the

CPT is unclamped from the repaired pipeline and fl own back to its deployment frame by the ROV. The machine is clamped to the deployment frame fi xture, de-energized and hoisted topside, leaving nothing on the seabed. The CPT is then cleaned and prepped for the next deployment, or for storage.

Wachs Subsea CPT represents the latest thinking in subsea pipeline repair and emergency preparedness. It’s a single mul- tifunctional machine, with its compact size and light weight allowing it to be air lifted within hours to any repair site. Its size eliminates the need for a large surface support ship or for a heavy workclass ROV to deploy it. And like all Wachs products the CPT is built to last, with high quality components that require minimal maintenance, and a small footprint for storage.

Designed for air transport, the CPT-3 is engineered to be strong yet lightweight. Ideal center of gravity and neutral buoyancy make the CPT series equally effective vertically as well as horizontally.

September 2014 56 MTR

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