Core Grouting Services Completes Pipeline-Free Span Project In Trinidad And Tobago

Core Grouting Services, an Acteon group company, has successfully completed a pipeline-free span rectification project in Trinidad and Tobago. Core installed grout bags at several subsea locations beneath a pipeline at water depths of 120-to-150 m.

Free spans on subsea pipelines are spans of the pipeline unsupported by the seabed and pipelines with long free spans are subject to increased fatigue loads and reduced pipeline integrity.

One method for correcting free spans is to install grout bags in the free span to support the pipeline. Grout bags are fabric formworks, which are positioned on the underside of the pipeline and then filled with a cement-based grout from a mixing and pumping unit situated on a support vessel. Once the bag is full, the flexible tether line is cut, activating the self-sealing valve on the grout bag inlet.

Ivan Harnett, managing director, Core, said, “Our client identified more than 50 locations on its subsea 24-in. pipeline where free spans required correcting with grout bags. We designed and manufactured customised grout bags to fit the free span locations, and the installation of the grout bags at the identified locations brought known freespans under the allowable design limit. Because of the water depth and remote location, the grout bags were positioned by ROVs. We also supplied bag deployment frames, which enabled the bags to be lowered to the seabed and successfully positioned by the ROV.”

About Core Grouting Services
Core Grouting Services (‘Core’) is part of the Acteon group of seabed foundation technologies companies and is focused on providing clients with expert services in grouting for offshore and subsea construction projects.

About Acteon
Acteon provides a range of global subsea services from surveying, installation, asset integrity management through to decommissioning. Acteon’s companies are 2H Offshore, Aquatic, Claxton, Clarus Subsea Integrity,Conductor Installation Services (CIS), Core Grouting Services, InterAct, InterMoor, J2 Subsea, LDD, LM Handling, MENCK, Mirage Machines, NCS Survey, Offshore Installation Services (OIS), Probe Oil Tools, Pulse Structural Monitoring, Seatronics, Subsea Riser Products (SRP), TEAM Energy Resources and UTEC Survey. Acteon’s companies share knowledge and experience to add value and create effective, tailored solutions for clients across four business segments: survey, monitoring and data; risers and moorings; seabed foundation technologies; and project support services.

 For more information visit: www.acteon.com.

About subsea services
Acteon's aim is to define, shape and lead subsea services through best-in-class expertise offering full market coverage across the whole life of a subsea field. Acteon’s integrated approach to subsea services makes it easy for clients to combine capabilities to meet their specific project needs. Acteon’s subsea services companies share knowledge and experience across four business segments to deliver highly efficient solutions tailored to a client’s unique challenges, thereby reducing overall cost, risk and complexity.

Seabed foundation technologies
Acteon provides foundations and geotechnical engineering services to add value and create effective, tailored solutions for clients. Acteon offers global expert capabilities in subsea foundations, including large-diameter hard-rock drilling, conductor and pile installation, grouting, specialist handling services and high-energy hammers. An extensive inventory of specialist equipment, leading engineering capabilities and innovative specialist foundation components characterise Acteon’s offering.