Drill assembly for excavating vertical annular cavities in the seafloor

The invention relates to a drill assembly for excavating into a seafloor an annular cavity about a vertically orientated central core and having a predetermined depth. The drill assembly comprises a drill device with an annular drill body and an annular drill head, an inner tubular and an outer tubu...

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Bibliographic Details
Main Authors ERIC ROMEIJN, ARTHUR ALEXANDER DE MUL, KORNEEL FRANCISCUS VAN DER MEER, PIETER DIRK MELIS VAN DUIVENDIJK
Format Patent
LanguageEnglish
Published 22.07.2024
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:The invention relates to a drill assembly for excavating into a seafloor an annular cavity about a vertically orientated central core and having a predetermined depth. The drill assembly comprises a drill device with an annular drill body and an annular drill head, an inner tubular and an outer tubular. The drill head is mounted to the drill body via a bearing that enables the drill head to rotate relative to the drill body for excavating the annular cavity. The drill device is removably mounted in the outer tubular with part of the drill head extending out of the outer tubular and can be retracted from the annular cavity via the outer tubular. The inner tubular and the outer tubular preferably each have a length larger than the predetermined depth of the annular cavity to be excavated.
Bibliography:Application Number: NL20232033956