FIELD: mining industry; method for radial expansion of tubular element in a well.
SUBSTANCE: in accordance to method, tubular element is positioned in well borehole, the former having first section, subject to expansion up to first diameter, and second section, subject to expansion up to second diameter, while first diameter exceeds second diameter. Expander is positioned in well borehole, containing first expander element and second expander element. First element has greater external diameter, than second element, and aforementioned elements are connected to one another with possible disconnection. Expander is moved through first section of tubular element for its expansion up to first diameter. Second element of expander is disconnected from first element of expander. Second element of expander is moved through second part of tubular element for its expansion up to second diameter.
EFFECT: improvement of method.
8 cl, 9 dwg
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