METHOD FOR ALIGNMENT OF THE WELLHEAD BOREHOLE DRIVES FOUNDATION AND JACK UNIT FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC E02D35/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, in particular, to methods and hydraulic devices for vertical movement of foundations and structures erected on foundations. Method for alignment of the wellhead borehole drives foundation includes preparation of openings for installation of jack units, supply of controlled pressure to jack units, fixing of necessary gaps between raised and support parts of structure, formed after lifting. Preliminary determined properties of bulk soil, on which foundation is installed, and its shrinkage under external pressure, based on this determining area of support plate, on which jack units are installed, to eliminate unauthorized sagging and the amount of additional soil for leveling the foundation after lifting. Openings are prepared under foundation for installation of thrust plate interacting with jack unit lifting part, under foundation bottom. Foundation level is leveled; after that, the foundation is uniformly raised to fill the selected amount of additional soil under it and the foundation is lowered to the ground, after which the jack units are removed.

EFFECT: technical result consists in providing work for lifting directly foundation on unstable ground due to selection of required support area and spring-loaded stop, as well as in providing work with unprepared foundations and its simple fixation at the required level after lifting.

2 cl, 1 dwg