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James Fisher Subsea Excavation launches patented revolutionary jetting technology

02nd October 2017

James Fisher Subsea Excavation (JFSE) has introduced a centrally located jetting system to its mass controlled flow excavation (M/CFE) equipment spreads.

James Fisher Subsea Excavation
James Fisher Subsea Excavation

The high velocity water jet, designed, developed and patented by JFSE, facilitates the excavation of soils previously considered too dense to excavate using traditional mass/controlled flow techniques.

Moving away from customary designs which place jets at the side of M/CFE tools, JFSE’s innovative technology dramatically reduces velocity degradation. JFSE’s excavators will now be capable of cutting soils with shear strengths up to double that which any other M/CFE system can realise. JFSE is the only M/CFE provider that can place its jets centrally. 

The jets will markedly improve efficiency where additional tooling is required to complete a project due to the density of the soils thereby helping to lower costs for clients. They will also decrease operational time on several excavations. 

The development of this new technology follows the recent successful launch of the MultiROV, an exclusive ROV system which provides new levels of controllability and productivity, as well as the Twin T8000 which has the highest volume output of any subsea excavator in the world. 

“Discussions with our clients identified this enhancement would offer significant benefits,” Graham Murdoch, technical director at JFSE, said. “We undertook a detailed computational fluid dynamic exercise to fully understand the effects of this setup and the results were impressive. We can now cut soils with shear strengths almost double that which any other M/CFE system can realise.”

The jets are now being fitted to JFSE tools which are stationed at strategic hubs in the UK, UAE, Singapore, Venezuela, USA, Brazil, China and Mexico.

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