ADJUSTABLE PUNCH FOR EXPANSION OF METAL BRANCH PIPES Russian patent published in 2020 - IPC E21B29/10

Abstract RU 2721922 C1

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, in particular to methods and devices for sealing of production string in well. Proposed device comprises top and bottom thrusts, stock and set of shaping sectors. Shaping sectors are made with shank, are assembled on step of upper stop with possibility of axial movement along it and are supported upwards by lower stop covering their shanks. Upper support has conical upper part for partial expansion of branch pipe and spring-loaded upward relative to lower stop.

EFFECT: simplified design, created automatically folding structure after expansion of narrowed section of metal branch pipe.

1 cl, 4 dwg

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RU 2 721 922 C1

Authors

Mingazetdinov Favasim Anvartdinovich

Dates

2020-05-25—Published

2019-12-17—Filed