Chet Morrison Contractors has developed an innovation in subsea cutting that offers substantial improvement over existing technologies. SHARC℠ (Subsea Hydraulic Abrasive Rotating Cutter) was developed to make subsea P&A work safer for divers by eliminating the need for hand jetting and reducing the time divers spend under water performing.
In addition, SHARC reduces overall jobtime by 60 percent and can be deployed by Chet Morrison’s 240-foot, 4-point DSV Joanne Morrison, thus avoiding the higher cost of larger spreads.
The prototype for SHARC was developed during a 2012 4-well Subsea P&A project for Helix ERT in three fields in the Gulf of Mexico. It proved so successful that Chet Morrison Contractors made the decision to further develop and refine the technology for use on other projects. According to Rod Hebert, consultant with Helix ERT , “ The Chet Morrison P&A, dive and marine crew did outstanding work. Using this new cutting tool, they completed four wells for us at about half of the expected cost. Chet Morrison saved ERT and partners many millions of dollars.”
Following the project, engineers at Chet Morrison Contractors spent many months testing and refining the prototype to develop the new assembly. SHARC needs only a diver or ROV to position it over the pipe opening — then operations can be controlled and monitored from the surface. SHARC can make clean, even cuts on pipes 2 inches and larger, handle walls up to 3 inches thick with multiple strings and can cut any size caisson or jacket leg from surface or subsea to depths up to 500 feet. Not only is SHARC a safer option for divers, it’s also better for the subsea environment. Unlike other methods, it does not require the use of explosives or hand jetting.
“Because our diving and well services experts worked together as a team, we were able to develop this outstanding improvement for diver safety that also reduces overall jobtime and project costs,” said Chet Morrison Engineering Manager Ryan Vestal. “As an industry leader in marine construction and well services, we will continue to invest in the people, resources and technology that enable us to deliver creative and safe solutions to serve our customers and industry. ”
[mappress] Press Release, May 29, 2013