Cutting edges of diamond bit dth drilling hammer is called the steel body PDC bit. The drill is a one-piece drill bit, the whole bit no activity components, structure is simple, has high strength, high wear resistance and impact resistance ability, field application proves that the drill steel body PDC drilling in soft - hard formation, the over speed and penetration, long service life, stable work, less downhole accident, well bore as well as good quality. A bit is now in the market is widely applied.
PDC diamond compact bit steel body with long time not only, also can be repeated use, can help clients save a lot of money. Bit quality, length of service life, and the selection of raw materials has a direct relationship. , of course, the influencing factors of diamond compact bit products and there are many, such as the use of the customer, what kind of rock in quality, many factors, has an effect on the service life of the product. If used on a hard rock mine, damaged the compact will be a little big, so to the requirement of diamond compact raw material is higher. PDC bit is one of the important tools fastest dth hammer for mining work now. In many parts of the mining work now can use this kind of product. The rock fragmentation principle of PDC bit decided its efficiency. Rock fragmentation mechanism of the PDC bit have? Serious analysis of the related content, to improve the work efficiency.
You know the drill bit broken rock, must understand the rock fragmentation by single diamond grain. In hard formation, single grain diamond under the effect of weight on bit rock under high stress condition (about 4200-5700 mpa, some think of up to 6300 mpa), make the rock lithology change, changed from brittle to plastic. Single diamond grain to eat into the formation, the torque under the action of rock cutting, cutting depth basically is equal to the diamond grains to eat into the depth. This process as "plough" so called plough type cutting action of diamond bit. For different strata, using the principle of rock and bit products is also different. Some harder to use enhanced diamond bit rock, soft rock, the use of ordinary products. In some larger brittle rocks such as sandstone, limestone, etc.), the diamond grains on the bit under the effect of wob torque at the same time, the volume of broken rock is greater than the diamond particle rotation and eat into the volume. When down the hole bit the pressure is not big, only along the movement direction of the diamond form small groove, increased pressure will make little rock broken, on either side of the groove depth and the section size of more than diamond grains. Composite patches on the diamond compact bit is the main components, compact damage, the bit will be scrapped. So, to understand the mechanism of rock fragmentation is really important.