Jinfan Drilling Equipment Co., Ltd., contact number; 13403176383 Mr. Yin QQ 710075096 Company main; Hubei Jianghan, Tianjin Lilin, Sichuan Chuanshi, Jiangxi Feilong, Shandong, Shanghai, etc., 66mm to 660mm various specifications tricone bit , composite sheet PDC bit, common tools for drilling. Integrity management, reliable quality, safe use, look forward to working with you. Introduction and description of pdc drill bit Hejian Jinfan Drilling Equipment Co., Ltd.; composite sheet PDC bit has two kinds of steel body and carcass. 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. The tungsten carbide carcass is resistant to erosion, wear, high strength and good diameter assurance results. The bite water eye area cocaine is designed according to the hydraulic parameters required by the drilling process, and has greater sensitivity. The extracorporeal type can be designed according to the characteristics of the stratum, and the shape of the carcass can be changed without changing the mold without adding equipment. The steel body PDC bit is machined from nickel, chromium and molybdenum alloy steel. After the heat treatment, the drilled body is drilled, and the artificial polycrystalline diamond composite sheet is pressed into the (tightly common) bit body, and the columnar tungsten carbide block is used to maintain the diameter. It is about 20% lower than the cost of the carcass drill, but it is not wearable and easily eroded. Both PDC bits are produced domestically.
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In 1973, the United States developed a polycrystalline diamond composite drill bit (Polycrystanlline Diamond Compact Bit), which is commonly used in soft-medium hard formations abroad. In the deep wells and offshore drilling in the Middle East and the North Sea, the first high drilling speed and high drilling speed were achieved, which greatly shortened the construction period and reduced the cost. It has been widely concerned by the drilling industry and has become a serious achievement in drilling. The domestic PDC bit has also caused great concern and interest. With the drilling technicians' views and theories on the PDC bit, it is gradually getting better results.
The rock breaking method of the PDC bit is mainly for plowing the soft formation and shearing for the hard formation. The polycrystalline diamond bit (Ballaset) is sheared.
Because the rock itself has low shear strength and high compressive strength, the method of excavating the stratum with the same rock shearing and plowing method requires less energy than the roller compactor. The shearing is crushing. 1/8), so the PDC bit is faster than the roller bit. With the same equipment premise, for medium hard formations, PDC bits are more capable of breaking rock than roller cone bits.
PDC bit cutting component—the composite sheet is bonded to the tungsten carbide substrate by high temperature and high pressure using a thin layer of artificial polycrystalline diamond.
Polycrystalline diamond flakes are made of many small-grained synthetic diamonds with a bifurcated rule and a bifurcated bias. The wear resistance is very good. The tungsten carbide substrate enhances the impact resistance of the composite sheet. The composite sheet can be self-sharp in the course of the task, that is, after the wear, the front blade is still 90o, and it is not blunt.
During the drilling process, the PDC bit uses a low weight-on-bit, high-speed to achieve a higher drilling rate. This drilling parameter is not easy to generate well deviation. It can be used together with screw drilling tools and turbo drilling tools to drill directional wells. It can be used for near-equalization and ultra-equal drilling, and can drill deep wells (high temperature wells), which can be used under less than 500oC. Because there are no moving parts, the risk of losing the cone is removed. It can be used for oil-based, water-based, heavy mud and foam drilling fluids, natural gas drilling and air drilling, and can achieve higher footage and drilling speed. Although the price of PDC bit is more expensive, because of the high footage and fast drilling speed, it can achieve better comprehensive economic benefits compared with the roller bit.
PDC drill bits are available in both steel and carcass. 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. The tungsten carbide carcass is resistant to erosion, wear, high strength and good diameter assurance results.
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