FIELD: oil-and-gas industry.
SUBSTANCE: after drilling parent hole and its anchoring to design depth, bore is expanded with cutting of casing interval of parent hole to make top and bottom parts of said parent hole. Expansion interval is cemented to drill the cement in expansion interval thereafter. Extra holes are drilled to run bearing plate which is to be oriented, fitted in place and tightly fixed by expansion so that plate side branches are located in appropriate extra holes. Bearing plate comprises two tightly connected hollow elements, one a bit longer than another one, that can expand. Note here that shorter element is composed of the first branch tor extra hole. Note also that longer element has at least one extra branch, similar to the first one. Said branches are located at different levers of longer element and are bidirectional elements.
EFFECT: possibility to construct multi-bottom wells from cased wells.
2 cl, 6 dwg
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