The Principle of Choosing a Diamond Bit

Diamond drill bits refer to watch and impregnated drill bits made of natural diamond, synthetic diamond, composite sheet, sintered body, polycrystalline, etc. as cutting tools. The drill bit itself is a rock fragmentation tool, and its working object is rock. In order to obtain the best geological effects and technical and economic indicators, Diamond Tools must be reasonably selected according to the physical and mechanical properties of the rock.

Drill Bits

Selection principle:

1.For soft to medium-hard and complete homogeneous rock formations, natural surface-set drills, composite drills, polycrystalline drills are generally suitable, and some sintered drills can be used.　

2. For hard to hard and compact rock formations, impregnated Drill Bits, concentric or staggered pointed ring groove drill bits, or fine-grained surface-inlaid diamond drill bits are generally suitable for use in hard to hard and dense rock formations.

3. In broken, hard and soft interlayers, developed fissures or strong abrasive rock formations, such as coal-measure formations, it is advisable to use sharp-tooth type broad-spectrum drill bits or electroplated impregnated drill bits with good wear resistance and reinforcement.

4. The principle of selecting the wear resistance of the carcass according to the abrasiveness, weathering and crushing degree of the rock is:

(1) Strong abrasive rock formations, use high wear resistance carcass.

(2) For medium abrasive rock formations, use a matrix with medium abrasion resistance. For weak abrasive rock formations, use low-wear-resistant carcasses.

(3) For complex rock formations, the stronger the abrasiveness, the harder the diamond drill bits with better grades and relatively finer grain size should be used.

(4) For highly abrasive and relatively broken rock formations, under the condition of ensuring good diamond enclosing, choose a diamond bit with a higher diamond concentration. On the contrary, for homogeneous, dense, and weakly abrasive rock formations, diamond drill bits with lower diamond concentration should be used.

(5) The rock formation is soft and has a lot of powder discharge. Choose composite drill bits or polycrystalline drill bits. For coring of easy-erosion rock and mineral layers, bottom jet drill bits should be used.

If necessary, please feel free to contact the Diamond Tools Manufacturer