DECO rapidly engineers solutions to operational challenges.
DECO is often asked to provide custom engineering solutions for unforeseen challenges during offshore construction projects. DECO has over a decade of experience in working closely with clients to successfully resolve their issues.
Our subsea engineering experience, combined with a long history of diving works, allows us to develop a bespoke solution. Fast.
In 2014, DECO worked with a major offshore marine contractor to provide a custom dredging solution for the removal of grout from the inside of pin piles. These pin piles secured a Well Protecting Structure to the seafloor, which needed decommissioning. Decommissioning required cutting the structures no less than 3 m below the seabed.
During installation the pin piles had been filled with grout, precluding access to the pin piles for the cutting process.
DECO was asked to come up with a dredging solution for the grout and the London clay underneath to allow access for cutting.
In 12 weeks DECO designed, built, tested and implemented a custom cleaning tool, aptly named “Maurice”. Maurice uses 1000 bar high flow water jet technology in a Spirograph pattern to cut and dredge the grout and the London Clay. At its operational heights dredging 6-7 m of grout and 3-4 m of clay took approximately 3.5 hours. During later tests Maurice successfully cut 116 MPa limestone and 184 MPa granite.