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PDC Drill Bit
The PDC bit is an abbreviation for polycrystalline diamond composite bit. It is a drilling tool commonly used in the geological drilling industry. PDC drills are mainly composed of bit body, PDC cutting teeth, nozzles, gauge faces and joints.
In recent years, the quality and type of PDC cutting teeth have undergone tremendous changes. If you compare the teeth of the 1980s with today's teeth, the difference is quite large. Due to variations in the mixing process and manufacturing process, the quality of today's cutting teeth is much better, and the impact resistance and impact resistance of the drill bit are greatly improved.
Engineers also optimized the interface between tungsten carbide substrates and synthetic diamonds to improve the toughness of the cutting teeth. Innovations in the layered diamond process have also been used to improve the abrasion and thermal stability of the product.
In addition to advances in materials and manufacturing processes, PDC products have also achieved significant breakthroughs in tooth design techniques and gearing. Today, PDC products can be used in areas that were previously unusable, such as harder, more abrasive and variable formations. This expansion into new areas has had a major impact on the balance between diamond (fixed cutting teeth) and roller bit.
Initially, PDC bits could only be used in soft shale formations because hard interlayers could damage the drill bit. However, due to the emergence of new technologies and structural changes, PDC bits have been able to be used to drill hard interlayers and long sections of hard rock formations. PDC drill bits are increasingly being chosen for people, especially as the quality of PDC teeth continues to increase.
Due to the design of the drill bit and the improvement of the teeth, the directionality of the PDC bit is also increased, which further weakens the advantages of the roller bit in the past in motor drilling. Currently, PDC bits are crowded out of the market for roller cone bits in many formation drilling applications every day.
PDC Drill Bits Can Be Divided Into Materials：
1. Carcass type PDC bit: A carcass type diamond compact (PDC) bit is a type of cutting bit that welds a diamond compact to a bit body by brazing. The carcass bit is sintered with tungsten carbide powder, brazed on the tungsten carbide carcass with a synthetic polycrystalline diamond compact, and the diameter of the natural diamond is used.
2. Steel body type PDC bit: Steel body PDC bit is machined by nickel, chromium and molybdenum alloy. After heat treatment, the drill bit body is bored, and the artificial polycrystalline diamond composite sheet is pressed into (tightly fitted) the bit body, and the columnar tungsten carbide is used to maintain the diameter.
PDC Drill Bit For Industry Classification:
1. Composite sheet drill bit for geological exploration: It is mainly used for geological exploration and exploration of composite sheet drill bit, suitable for soft to medium hard rock formation. Now some new composite sheets developed by some manufacturers can be applied to ten grade hardness rock layers.
2. Coalfield drilling adopts composite sheet drill bit: it is mainly used for coal seam drilling and mining in coal mines. Generally speaking, the rock formation of the coalfield is relatively soft, and the composite drill bit is widely used, such as a bolt drill bit and a three-wing drill bit.
3. Composite sheet drill bit for oil exploration: It is mainly used for drilling drills in oil and gas fields. At present, the composite sheet drill bit for oilfields is the most expensive and most demanding of all composite drill bits. It can be said that it is a nobleman in the composite drill bit.
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