Nederlansche Maatschappij Tot Het Verrichten Van Mijnbouwkundige Werken
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E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
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Engineering & Computer Science
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Physics & Mathematics
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NL2220A1913-03-061913-03-06Verbetering aan een toestel voor het afsnijden van boorbuizen
NL1303C
(nl)