摘要:The classification of DTH bit (bit)

In the high wind pressure DTH drilling engineering, to achieve efficient and fast drilling purposes, you need to select the DTH Drill quality and efficiency ,that is to say, according to the different drilling and rock type selection of DTH bits of different structure. Bit face structure, powder discharge groove shape, hard alloy tooth shape and size, a series of factors of the bit body hardness is directly affect the drilling rate, drilling, hole straightness, drill life and work efficiency. Therefore chooses the suitable bit is very important in drilling engineering.

        High pressure DTH bit (bit), end design form is mainly used in four forms, namely: face convexity, end plane concave surface, surface and deep concave center type. Hard alloy using a ball tooth, spring tooth or tooth, spring tooth common cloth tooth.

   1, end face convexity convexity: high air pressure DTH bit (bit) can keep drilling rate higher in drilling in hard and hard abrasive rocks, but the hole straightness is bad, not suitable for hole drilling engineering high flatness requirements.
    2, end plane: end plane type high pressure DTH bit (bit) is relatively strong and durable, suitable for drilling hard and very hard rock. At the same time, can also be used in hard rock in drilling hole flatness requirements are not high rock and soft.
   3, end concave surface: surface concave type high air pressure DTH bit (bit) surface have a conical concave part, the bit in drilling process of mild nucleation, retaining a bit in drilling performance, has good straightness of gun. In addition, this bit fly effect is good, the drilling speed is faster, is a high pressure submersible currently on the market more drill.
   4, the end of deep concave center type: face deep concave center type high pressure DTH bit (bit) end center part has a deep concave part of the center, for the nucleation of drilling process, can keep the hole straightness chisel drilling bit, but its end strength than other forms of weak, because this is only in the drilling of soft rock and Ying rocks.