VACUUM CONTROL METHOD FOR A RISER LINE

Disclosed is a method for deep sea mining including: generating an upward flow of valuable matter in a riser line from the bottom of a body of water to a matter processing platform; processing the matter at the processing platform; generating a return flow in a return pipe of a mixture of seawater a...

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Bibliographic Details
Main Author LUCIEER PIETER ABRAHAM
Format Patent
LanguageEnglish
Published 16.06.2016
Subjects
DREDGING
EARTH DRILLING
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
MINING
MINING OR QUARRYING
SOIL SHIFTING
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Summary:Disclosed is a method for deep sea mining including: generating an upward flow of valuable matter in a riser line from the bottom of a body of water to a matter processing platform; processing the matter at the processing platform; generating a return flow in a return pipe of a mixture of seawater and a non-valuable part of the matter from the processing platform towards the bottom of the body of water; and controlling the pressure in the return pipe for avoiding collapse of the return pipe and/or cavitation of the return pipe, in particular for avoiding collapse of or cavitation in an upper part of the return pipe.
Bibliography:Application Number: US201414904626