| 摘要 |
FIELD: construction. ^ SUBSTANCE: soil well reamer comprises the following components arranged on pneumodrill body - support rim and ring, on lateral side of which there is a flexible link attached as a cable with its protrusion to day surface, and this link is fixed as hidden, with no contact in areas of well walls fixation and not coming out of the ring contour limits, both during operation of pneumodrill and during reamer withdrawal from well. At the same time the ring is solid and has oval shape, and rope is fixed to lateral side of larger diametre ring. ^ EFFECT: design simplification; reliability and operational safety enhancement. ^ 2 dwg |
