The surface set diamond bit is produced from a single layer of
natural diamond setting on the surface of bit crown with hard
matrix.
Surface set diamond bit is mainly recommended for drilling soft to
hard formations. Generally speaking, surface set diamond bit can
provide satisfying penetration rate.
To choose a right surface set for the formations drilled, we need
at least consider the following aspects: diamond size, diamond
grade, profile design.
Principle of choosing diamond size: the harder the rocks, the
smaller the diamond size should be.
Rule of selecting diamond grade: the harder the rocks, the better
the diamond grade should be.
