Russian translation: Раздвижной расширитель для расширения скважины ниже башмака обсадной колонны
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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:
Раздвижной расширитель для расширения скважины ниже башмака обсадной колонны
Explanation: An expandable reamer shoe is provided for use with expandable casing in a borehole. The reamer shoe has a number of reaming members in the form of blades which remain closed against the body of the shoe when inserted through casing, and can then be expanded to underream below the casing. Additionally, the expandable reamer shoe is made substantially of a drillable material so that the borehole can be extended beyond the point reached by the expandable reamer shoe.