| 摘要 |
FIELD: mining industry, particularly for drilling wells with rock cutting tools having high rotational speed increasing 700 min-1. ^ SUBSTANCE: drill has drive installed on ground surface, drilling pipe string, anchoring device installed to cooperate with well wall by at least component of anchoring device, speed-increasing unit, sine-ball rock-cutting tool fixedly secured to driving shaft end of speed-increasing unit. Drilling string is coupled with driving shaft of speed-increasing unit by sliding pair and with anchoring device by rotating pair. Anchoring device may cooperate with speed-increasing unit body by at least one component thereof through rigid link. Base for anchoring means springs is rigidly connected to speed-increasing unit body or part of anchoring means adapted to strut shoes is fixedly connected to speed-increasing unit body. ^ EFFECT: increased mechanical drilling speed and increased linear cutting speed, possibility to perform drilling in modes close to optimal ones. ^ 3 cl, 1 dwg |
