JACKING SYSTEM WITH AUXILIARY STRUCTURE Russian patent published in 2017 - IPC E02B17/00 E02B17/02 B63B35/44 E21B7/12 E21B15/00 

FIELD: mining.

SUBSTANCE: group of inventions relates to jacking systems for drilling and production at sea areas exposed to icing. Jacking system with auxiliary structure comprises a working deck structure, a plurality of support columns movably connected to the working deck structure, cantilever arranged on the working deck structure, drilling derrick located on the cantilever, one or more support main structures located on the sea bottom, and a plurality of movable supports, each of which is rigidly connected to the main deck structure. Working deck structure, a plurality of support columns, cantilever and drilling derrick form a jacking drilling assembly. Method consists in the fact that during initial assembling of the jacking system, a plurality of support columns is being lowered to the sea bottom to lift the working deck structure with required height. During assembling of the jacking system, a plurality of movable supports passes from the working deck structure to said one or more support main structures so, that said one or more support main structures support the weight of the main working deck structure while replacing one or more of said plurality of support columns. Said one or more support columns, replaceable to said one or more support main structures, are defined as support columns not supporting the weight, and the rest of a plurality of support columns, not replaceable to said one or more support main structures, are defined as support columns supporting the weight. After assembling of jacking system with auxiliary structure, the support columns not supporting the weight are being removed from water in required position, support columns supporting the weight together with said one or more support main structures via movable supports support the working deck structure.

EFFECT: technical result is supporting of the jacking assembly, simple dismantling for reusing after drilling required wells.

10 cl, 9 dwg