FIELD: oil and gas production.
SUBSTANCE: installation consists of drive positioned in case, of mechanism for fixation of case in casing pipe, of drilling unit with mechanism of rotation and drill feed made in form of rod with cutting head on working end and drill rods attached to it, of drum type cartridge for drilling rods and of unit for supply of drilling rods from cartridge to drill unit. The supply unit corresponds to a feeding channel with an aligning bushing positioned on its output. The cartridge rotates around its axis alternately matching output apertures of vertical channels with an input aperture of a feeding channel. The rod with the cutting head is initially installed in the aligning bushing.
EFFECT: facilitating increase of length of drilled channel at simultaneous accuracy of drilling and reduced dimensions of installation.
7 cl, 9 dwg
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