Hydraulic and earth engineering – Marine structure or fabrication thereof – In or on frozen media
Patent
1985-08-05
1987-10-13
Taylor, Dennis L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
In or on frozen media
405195, 405 60, 62260, E02D 2100, E02B 1700
Patent
active
046995455
ABSTRACT:
The present invention provides an approach for drilling offshore arctic wells in areas covered by floating ice. A grounded spray ice drilling structure having an inner drilling platform portion and an outer barrier portion which are contiguous is constructed by withdrawing water from beneath the ice sheet and spraying the water through the air when the air is below the freezing temperature of the water. This causes the water to freeze into spray ice as it passes through the air. The resulting spray ice is deposited on the ice sheet to build up the grounded spray ice drilling structure. The outer barrier portion is built up to a greater freeboard than the inner drilling platform portion, and is adapted to laterally confine the inner drilling platform portion and to protect the inner drilling platform portion from natural ice forces.
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Chen Andrie C. T.
Jahns Hans O.
Exxon Production Research Company
Johnson Kenneth C.
Taylor Dennis L.
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