The rotary drilling drill bit rock weathering by what
The rotary drilling drilling in weathered rock weathering, according to the hardness of the rock to determine what bit.Stainless steel drills are generally used. Especially hard cases with diamond or graphite steel drills.
Rotary drilling rig is a kind of construction machine suitable for drilling operation in building foundation engineering. Mainly suitable for sand, clay, silty soil layer construction, bored pile, continuous wall, foundation reinforcement has been widely used in various foundation foundation construction, the rated power of rotary drilling rig is 125 ~ 450kW, the power output torque of 120 ~ 400kN / m, the maximum diameter of Kong Zhi is 1.5 to 4m. The maximum hole depth is 60 ~ 90m, can meet the requirements of all kinds of large-scale infrastructure construction.
According to the hardness of rock to select the drill bit, in general hardness, with stainless steel drill bit, especially hard case with diamond or graphite steel bit.
