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Research Article

Detection of hydrate plugs inside submarine pipelines using neutrons

, , , , , , , , , & show all
Pages 245-257 | Received 01 May 2021, Accepted 01 Oct 2021, Published online: 25 Oct 2021
 

ABSTRACT

The objective of this study was to demonstrate the feasibility of localising and detecting hydrate plugs inside submarine pipelines, in situ and contactless, using neutron-induced analytical techniques. Cold and fast neutron-beam instruments at Heinz Maier-Leibnitz Zentrum (MLZ) were used to show that neutrons penetrate through the thick wall and the insulation of such pipes and even the induced gamma radiation can be detected outside to perform a non-destructive chemical analysis within the pipe. It was found that the change in the hydrogen concentration caused by a possible hydrate plug can be detected in seconds; while with a detailed analysis at a given spot lasting for a few hours, it is possible to unambiguously identify the hydrate phase inside the hydrocarbon phase.

Acknowledgements

Industrial users would like to thank the scientists and engineers from MLZ, for arranging meetings and managing smoothly experiments flow at the Research Neutron Centre Heinz Maier-Leibnitz Zentrum in Garching near Munich.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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