Implications, advantages and disadvantages of PDC compacts _ BITs
Original title Meaning advantages and disadvantages bra tape measure of PDC compact PDC also known as Polycrystalline Diamond Compact is widely used in the field of geological drilling and oil drilling because of its excellent abrasion resistance and impact resistance Today Sidi Xiaobian shares with you the knowledge of dry goods related to PDC composites Let’s go with Xiaobian to see the advantages and disadvantages of PDC composites and make better use of them PDC compact is a new type of functional material which is a composite superhard material sintered by diamond powder and hard alloy substrate under the condition of ultra-high pressure and high temperature It not only has the high hardness wear resistance and thermal conductivity of diamond but also has the strength and impact toughness of hard alloy It is an excellent cutting tool and wear-resistant tool material It has been widely used in many fields such as metal and non-metal cutting tools wood processing tools oil and gas drilling bits and so on
In geological drilling coalfield drilling and oil and gas drilling DHD Drill bit PDC compact bit has become one of the most commonly used rock breaking tools because of its excellent rock cutting speed and long service life Let’s take a look at the advantages of PDC bits 1 The force balance design makes the drill bit have good guidance which is suitable for directional drilling with downhole motor and has small radial vibration; 2 The reasonable arrangement of the patented PDC compacts with different structures at different positions of the drill bit makes the drill bit have strong aggressiveness and abrasion resistance; 3 Strong aggressive design can make the bit obtain higher penetration rate; 4 the drilling capacity in the rock stratum is 10-30 times of that of a common alloy drill bit and the operation efficiency is improved; 5 Because the material of PDC bit is mainly cast tungsten carbide and diamond compact it has long service life and high value At the same time down the hole bit the PDC bit also has its indispensable shortcomings and the conventional PDC bit has several shortcomings 1 Due to the large difference of linear expansion coefficients between polycrystalline diamond and cemented carbide the thermodynamic characteristics of the interface between polycrystalline diamond and cemented carbide are not well matched and there is a large residual thermal stress which easily leads to the delamination of diamond and tungsten carbide; 2 The surface of PDC is mostly flat
