| 摘要 |
FIELD: mining.SUBSTANCE: chisel for drilling with cyclic washing of a bottomhole includes, as a mechanism that controls cyclic feed of drilling mud to a well bottomhole, a helical pair, a carrier, a closer gate, a filtration seat with holes evenly distributed on it. In order to ensure maximum use of energy of the drilling plant hydraulic system, the helical pair body is made structurally as a whole with the chisel body, besides, the filtration seat is installed in the chisel body and is arranged in the form of a single hydraulic system with a complex of through attachments of the chisel - channels of various diametre.EFFECT: higher efficiency of action by pulsating washing of a drilling mud at a well bottomhole.1 dwg |
