A critical role for 3D laser-scanning

 

Reverse-engineering subsea interfaces in decommissioning.

One of the most significant markets for us here at Savante involves reverse-engineering the interfaces found on aged subsea-assets. With the North Sea oil province now over 40 years old and with many fields preparing for decommissioning many of our clients are discovering that the quality of archived engineering diagrams are not of sufficiently high enough quality to enable accurate determination of interfaces or identification of specific intervention tools. This is creating a problem in planning future decommissioning operations.

In the decommissioning of wellheads in particular, planning to accommodate a wider variety of contingency interfaces and adopting a "trial and error" approach can add significant and unnecessary cost in tooling and MODU hire time. Critically the use of incorrect tooling can increase the risk of damaging the asset; particularly risky if deployed onto threaded assemblies which may incorporate elements of a safety barrier design philosophy.

Photocopies of photocopies of a fax of a photocopy.

In point of fact, over 40% of well and subsea engineering diagrams we received in 2015 and 2016 in advance of project kickoff meetings are completely illegible; vital dimensions and text apparently "redacted" or in many cases, where pages which have accidentally folded whilst on the copier platen, have resulted in a complete loss of data. In a further 25% of projects, we've discovered from the as-found condition of assets taken from recent ROV video inspections incorporates features which do not even appear in those original engineering diagrams.

3D Subsea laser scanner restores lost data (and faith)

3D subsea laser scanning can remotely (non-contact and therefore without risk of damage) and accurately be used to reverse-engineer subsea infrastructure; eliminating the uncertainty associated with the design of a subsea interface or components.

Laser-based identification of thread spacing on an M1.5 bolt

Whether providing confirmation of threaded-assembly specifications or providing confirmation of the dimensions of an interfacing port or indeed their relative locations; our technicians can render a 3D scene in a matter of seconds as part of an ROV inspection. This information can be used to restore lost engineering data or simply to add confidence to the quality of data already retained.

What Next?

Savante IS the answer to your subsea laser scanning requirements and we guarantee better results through our advanced technology and bespoke engineering solutions. In this fast-paced industry, we understand the value of precision, speed and costs and Savante can demonstrate the wide and varied cases of subsea laser scanning accomplishments and the value these have yielded to our international client base.

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