|Impregnated Synthetic Diamond Core Bits|
The impregnated diamond core bit has emerged as the most commonly used type in the mineral exploration industry. CDG’s impregnated Diamond Core Bit performance is the product of many years of research, coordinating diamond grading and selection technology, bit design, matrix composition and manufacturing processes with extensive testing under a very wide range of drilling conditions. The result- China Drilling impregnated core bit can be designed and produced to give the best performance and economic results under any specified drilling conditions.
|Surface-set Diamond Bits|
The surface-set diamond bit differs from the impregnated diamond type in that they are set with a single layer of natural drill diamond on the working surfaces of the bit crown in a pre-determined pattern. The diamonds are mounted in a bit crown powdered metal matrix body that is fused to a steel tool body or shank.
The PDC bits, include the core and non-coring types, have been used in soft to medium formation of hardness 3-6.
The surface of the disc-shaped cutting element consists of very fine synthetic diamond powders sintered together by a high pressure, high temperature process. Backing this diamond layer is a tungsten carbide stud which is brazed directly into the bit matrix by a special process. These cutters can take the enormous compressive and shear loads generated during drilling without failure or erosion.
PDC core bits are ideal for use on high powered drills at relatively low rotation speeds. Remarkable results have been obtained both in bit life and penetration compared with surface set bits.
|Rod Shoes & Casing Shoes|
The surface-set diamond casing shoes and rod shoes are recommended for soft to medium hard formations while impregnated casing shoes and rod shoes are recommended for hard and fractured formations.
The rod shoe is made into semi-round type crown profile. The casing casing shoe is made into “V” crown surface.
The impregnated casing shoes and rod shoes can be made into different hardness matrix and different matrix height as customer’s request.
|Backpack Drill Bits|
Backpack drill bits has been used for handheld drill which has been found to be best used as a near-surface initial scanning and mapping tool.
|Tungsten Carbide Core Bits|
The tungsten carbide bit uses tungsten carbide as the cutting media. This kind of bit has a perfect cost performance when drilling softer unconsolidated formations that are mainly composed of clay,sand,gypsum or soft shale.