PDC Bolt Drill Bit
At present, the alumina and ceramic nozzles, cemented carbide nozzles, and boron carbide nozzles are commonly used in sandblast peening processing in the hardware and machinery industries.
1) Polycrystalline diamond drill bit. Small-diameter polycrystalline diamond drill bits (Fig. 6) suitable for oil drilling and geological exploration are very inexpensive compared to natural diamond and have high wear resistance.
2) Polycrystalline diamond nozzle. At present, the alumina and ceramic nozzles, cemented carbide nozzles, and boron carbide nozzles are commonly used in sandblast peening processing in the hardware and machinery industries. The nozzles made of polycrystalline diamond material have a 10 to 200 times longer life than ordinary material nozzles and have achieved an unprecedented long service life. The use of polycrystalline diamond nozzles can significantly reduce material consumption, significantly improve work efficiency, can also significantly reduce the market demand for ceramic abrasives and carbides, and have significant social benefits of energy conservation and environmental protection. The polycrystalline diamond nozzle has the characteristics of reliable performance and long life, and is suitable for many occasions with high wear resistance requirements. At the same time because of the characteristics of acid, alkali and corrosion resistance, polycrystalline diamond nozzles are also suitable for water cutting, acid and alkali liquid nozzles, mud nozzles and other occasions, the market and application prospects are very impressive.
3) Diamond composite thrust bearing. A screw drilling tool is a downhole power drilling tool powered by mud in oil drilling. The drive shaft assembly of the new screw drilling tool adopts the radial thrust bearing of the cemented carbide and the flat thrust bearing of the diamond composite sheet (Fig. 7), so that the new material knowledge park Science Corner can be designed as a more reasonable and effective interface structure. It is an important technology for improving and improving the performance and quality of diamond compacts, and it is also one of the research and development directions for future diamond composites.
4) Research on the modification of the surface state of diamond compacts. In the mid to late 1990s, a large number of mirror-finished drilling diamond composite drill teeth were used. The polished diamond surface is considered to be more conducive to the chip swarf removal of the diamond composite disc, reducing the probability of mud packs occurring in the diamond compact bit, and significantly increasing the drilling speed and prolonging the service life of the bit. The removal of cobalt from diamond compacts to improve heat resistance has been reported as early as the 1980s. US NOV company re-use of the results in recent years introduced cobalt-free diamond composite sheet, and patent protection. The cobalt-removing diamond composite sheet removes the cobalt phase with a depth of about 0.3 mm from the diamond phase to eliminate the harmful effect of the diamond composite disc working at higher temperatures and greatly improves the wear resistance of the diamond composite drill bit. Sex, allegedly can triple the lifetime of non-cobalt-free diamond composites.