Test results show diamond enhanced tungstencarbide composite spherical crown button bits are the ideal bits in drilling cobble and gravel formation.
试验表明金刚石—硬质合金复合球齿钻头是一种理想的钻进卵砾石层的钻头。
2
Along with the oil prospecting and production, the existent drilling bit (steel and tungstencarbide tooth bit) was not effective in some complicated stratum.
随着油气勘探开发的不断深入,现有牙轮(钢齿、镶齿)钻头已难以对一些复杂地层进行有效的钻进。
3
The rock drilling rate, service life and tungstencarbide toothavailability of the series of bits are obviously better than those of chip and button type bits.