Classification of diamond drill bits

 1. surface set diamond bit
Explanation: A kind of diamond drill bit. The steel cylindrical bit body has a wire buckle on the upper part and a sintered drill head body on the lower part. The diamond particles are encrusted on the surface of the drill head body. The outer diameter of the carcass is slightly larger than the diameter of the steel body and the inner diameter is slightly smaller than the diameter of the steel body. There are grooves inside, outside and at the bottom that allow water to pass through the carcass. During drilling, washing fluid is used to carry away rock powder and cool the bit. Diamond-impregnated bits are all encrusted with natural diamonds and are therefore expensive, so they are only used in hard formations that are particularly difficult to drill. Diamond-impregnated drill bit is more commonly used in oil drilling.
2. impregnated diamond bit

Explanation: A kind of diamond drill bit. A drill bit whose head body is uniformly encrusted with diamond particles. During drilling, the tire body is worn out, and the diamonds keep coming out to take rocks. The tire body can be worn out all the time, and there are newly exposed diamonds to work, which is similar to the grinding wheel for metal materials. The body has a certain height, the outside diameter is slightly larger than the outside diameter of the bit body, and the inside diameter is slightly smaller than the inside diameter of the bit body. The outside side of the body, the inside side and the bottom side of the body are provided with water tanks to remove rock powder and cool the bit through the washing solution. Most diamond-impregnated bits are artificial diamond bits, known as artificial diamond-impregnated bits. Synthetic diamonds are much cheaper than natural diamonds and can be used more widely to drill in hard formations.

3.electroplated diamond bit
Explanation: also known as casting diamond bit. Unique diamond drill bit made of electroplating principle in China. The diamond carcass is coated layer by layer on the bit body in the electroplating tank. At the same time, the electroplating covers the electrolytic metal, and the diamond is coated in the electroplating metal layer. Repeated sand and coating over long periods of time forms the working layer of the bit. During electroplating, the bit steel body is also shaped by plastic mold, so that the coating grows along the axis of the bit, and ensures the inner and outer diameters and small grooving of the carcass. For electroplating diamond drill bits Diamond is also mostly artificial diamond, the composition of the drill head body is mainly nickel, and common impregnated diamond bit has the same application conditions.

4. The bit with diamond composite as the cutting edge is called diamond composite bit.

Diamond composite sheet (PDC) is a special superhard material synthesized by artificial diamond and hard alloy at high temperature. It not only has the advantages of high diamond hardness and wear resistance, but also has the characteristics of strong impact resistance and large edge of hard alloy. Using PDC as the blade of a bit can greatly improve the working efficiency of the bit. It is ideal for drilling into medium and hard rock formations. Series of diamond PDC bit, supporting emery bit, supporting body made of high quality steel calcined forming, after vacuum automatic heat treatment equipment to increase the mechanical properties. The ordinary type uses the domestic high quality composite blade as the blade, and the super type uses the blade produced by GE company in the United States. The corresponding quality grade is selected according to the different geological conditions, which can achieve a higher cost performance of the product and achieve the economic index of energy saving and high efficiency. Diamond drill bits all over the country in coal fields, oil drilling, geological exploration, water conservancy and hydropower, railway and highway, tunnel construction and other industries. Two-wing PDC bolt bit (half piece standard type) is adapted to the rock layer below eight levels, and the drilling life is 10-3 times that of ordinary alloy bit under the same rock layer conditions. The efficiency is at least 60% higher than that of ordinary alloy bit, without grinding, greatly reducing the labor intensity of workers and saving time. The key raw material for the blade of two-wing PDC anchor bit (half-piece reinforced type) is produced by GE. The diamond content of the blade is 1.5 times that of the ordinary bit, with excellent wear resistance, significantly improved efficiency, and reduced overall cost. It is suitable for medium hard rock strata below grade 12.
The blade of high strength diamond bit adopts the newly developed spherical diamond blade, which is characterized by fast drilling speed and strong impact resistance. When the bit is drilling, the lip is used to scrape the rock of the normal uniform formation. The protruting part prevents the bit from being drilled in large amounts of time when it encounters gaps during drilling, which greatly reduces accidental damage to the bit and improves the drilling level in complex formations.