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ронками, отличающийс тем, что, с цеаью повышени надежности и долговечности бурового снар да при бурении скважин большого диаметра, буровые коронки св заны между собой,-образу сплошную забой11уюRonks, characterized in that, with the goal of increasing the reliability and durability of the drill string when drilling large diameter wells, the drill bits are interconnected, - a continuous bottomhole
часть, состо щую из цвнтральигаго сокгоро с опорной площадкой со стороны боковых поверхностей и периферийных секторов с посадочными выступами со стороны, примыкающей к центральной коронке.The part consisting of the Sockgoro color box with a supporting platform on the side of the lateral surfaces and peripheral sectors with landing projections on the side adjoining the central crown.
PROCEDURE FOR THE CONSTRUCTION OF A DRILLING HEAD PROVIDED WITH HARD ELEMENTS RESISTANT TO WEAR, AND WITH A DRILLING HEAD CONSTRUCTED ACCORDING TO SAID PROCEDURE.