Freespan Correction
Pipeshield provides a turnkey solution for freespan correction and rectification works
Pipeshield provides a number of solutions for freespan correction and rectification works. We can design, manufacture & supply products to support, stabilise and protect pipelines, cables and subsea structures. Our services include the design and specification of fabric-formworks, performance analysis and offering best-cost options.
PRP Units
Pipeshield manufacture and supply our own PRP filter units. Available filled in standard 250kg, 2t,4t and 8ft in air. Rock is usually locally sourced. The stone-filled net unit is designed to encase the stone preventing it from breaking down or migrating from its intended location. PRP units can be easily positioned by divers or ROV for a multitude of applications within Oil & Gas, Renewables and the Marine Civils sector. Multiple units can be deployed at the same time using Pipeshield’s bespoke design lifting beam.PRP rock placement can be used as a temporary or permanent solution, and in subsea conditions will over time encourage marine life, becoming a permanent habitat.
Bulk & Drop Bags
Used as a method of bulk rock or gravel deployment, our subsea rated drop bags are designed with a large chute in the base and lifted and activated using one of our standard quick-release frames or beams. Commonly available in 1t & 2t sizes, we can source and supply pre-filled bags using locally sourced rock or aggregate. Rock can be supplied certified to a certain grade or density as required.
Rigged up to one of our specialist frames or beams, multiple bags can be installed simultaneously and activated either by a diver, ROV or using our hydraulic release kit (HRK)The bag is then recovered to the surface. This method can offer huge cost reductions compared to conventional rock dumping as a much less capable vessel is required
Fabric Formworks
Fabric formworks can be used when existing pipelines have been subject to scouring or where the seabed profile under the pipeline has created excessive free-spans.
Fabric Formworks are envelopes which incorporate one or more grout injected nozzles. These are then inflated with the grout which when cured forms permanent support under the pipeline.
The envelopes are made from reinforced woven polypropylene, are quick to install and can be deployed either by diver or ROV.
They can be used in conjunction with smaller grout sacks to give complete support and solve your free-span permanently.
Pipeshield have a standard range of fabric formworks or we can manufacture bespoke designs to suit your requirements.
