METHOD OF ERECTION OF MARINE PLATFORM Russian patent published in 2003 - IPC

FIELD: erection of technological platforms for performing jobs in offing; installation of derricks in river beds, swampy areas, under permafrost conditions or on quick sands. SUBSTANCE: method includes transportation of base and deck with technological equipment to area of their installation in above-water position, placing the base on bottom and securing it by means of piles followed by mounting the deck on said base. Then, technological wells are drilled and annulus space is filled with cement mortar. Cementable piles are mounted in stepped pile wells drilled preliminarily. At least one casing pipe is mounted in each step of well at spaced relation to its surface; said clearances and clearances between casing pipe and cementable piles mounted coaxially, as well as its inner cavity are filled with cement mortar. Length of casing pipe is dictated by condition of overlapping unsteady rock. Then, deck with technological equipment is mounted on base. Cementable piles and technological wells may be combined when technological well or production casing string may be located inside cementable pile (performing function of conductor) at spaced relation. In drilling stepped pile wells, mounting cementable piles and technological wells, use is made of self-elevating floating drilling platform; for performing assembly jobs, at least two self-elevating floating transport platforms are used. After leveling the horizontal surfaces of deck and platform, they are coupled together and technological equipment is shifted from one platform to other platform. EFFECT: enhanced operational reliability of platforms due to their enhanced stability. 5 cl, 7 dwg