АЛМАЗНАЯ БУРОВАЯ КОРОНКА

摘要

FIELD: mining industry, particularly for drilling wells along with coring thereof during solid mineral prospecting. ^ SUBSTANCE: diamond drilling bit comprises body with matrix divided into a number of sections by waterways. Concentric rock-cutting members of diamond bit matrix are provided with cutters made of superhard composite material arranged from end matrix surface and installed in arches of the sections. Distance between cutters decreases from drilling bit periphery co center thereof. ^ EFFECT: increased operational reliability and service life. ^ 2 dwg