FIELD: hydraulic structure construction, particularly to protect self-elevating floating drilling installation in freezing sea shelf.
SUBSTANCE: protection device comprises protective ice-resistant structure with ground core fill arranged inside it. Ice-resistant structure is made as integral double-walled shell, which may float due to shell air-tightness. The shell has bottom and deck extending along shell perimeter, as well as shaft orifices to receive support columns of self-elevating floating drilling installation. The shell has ballast system including ballast pumps, drilling conductor, as well as mooring, towing and anchoring means. Method for protection device installation involves manufacturing protective ice-resistant structure; transporting thereof by water; installing protective ice-resistant structure on water body bottom in designed position; forming ground core fill. Before protective ice-resistant structure installation on water body bottom the structure is jointed with self-elevating floating drilling installation when protective ice-resistant structure is located under water by directing self-elevating floating drilling installation so that support columns thereof are over shaft orifices made in protective ice-resistant structure. After that support columns are inserted in shaft orifices and ice-resistant structure emerges along with self-elevating floating drilling installation by ballast removal therefrom. Then the assembly is moved to drilling point and lowered on bottom in designed position.
EFFECT: increased efficiency of drilling installation usage, decreased time and costs of self-elevating floating drilling installation provided with protective device construction.
3 cl, 11 dwg
