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How to choose PDC core drill bits?

Views: 311     Author: Site Editor     Publish Time: 2021-10-11      Origin: Site


PDC core drill bits selects high-quality diamond composite sheet, which has the characteristics of wear resistance, high drilling efficiency, and constant quality. For medium-hard and hard rock formations of f=1-16 level, PDC core drill bits can destroy them in one blow. If the rock mass is extremely hard, we can add trace elements based on the original formula to enhance the hardness of PDC core drill bits. And today let's talk about how to choose PDC core drill bits.


Here is the content list:

What are the applications of PDC core drill bits in various fields?

Structure features of PDC core drill bits.

How to choose PDC core drill bits?


What are the applications of PDC core drill bits in various fields?

PDC core drill bits select high-grade diamond single crystal or natural diamond particles, processed by scientific formula and special technology, and are aimed at extra-hard rock mass. PDC core drill bits can be used in coal mines, roads, railways, bridges, geological prospecting, water conservancy and hydropower, and other units that need construction. The practice has proved that this bit is suitable for drilling soft and medium-hard (rock formations with drillability below grade 9) such as carbonate rock, limestone, chalk, claystone, siltstone, sandstone, etc. It is similar to ordinary drill bits. Compared with, especially when drilling into rock formations of grades 6-8, the effect is particularly significant.


Structure features of PDC core drill bits.

PDC core drill bits adopt arc-shaped crown design and high-density tooth arrangement. It is suitable for coring operations in medium-hard formations. The main cutting teeth are diamond composite discs, and their service life is more than 10 times that of cemented carbide and more than 5 times that of ordinary diamond bits. The high-quality composite sheet effectively improves the performance and life of the drill bit. The diamond exposure is large (almost all the composite polycrystalline layer is exposed), and the drill bit can always remain sharp, thus greatly improving the footage speed. The cutting structure has strong aggressiveness and large pieces of rock debris can be used. The drill bit uses scraping and shearing to break the rock, and its weight on bit only needs to be about 1/3 of the weight on the diamond-impregnated bit of the same diameter. Through the optimized flow channel, the rapid movement prevents the blockage of the annulus flow channel. Gauge and inner cone inlaid high-strength TSP greatly improve the wear resistance and service life of the drill. The special blade wing water eye layout improves the cooling and cleaning capabilities of the drill bit and improves the cutting's transport efficiency.


PDC core drill bits have a higher drilling speed and longer life when working, and the high-strength PDC core drill bits cutting teeth can complete coring operations in hard formations. Due to the fast drilling speed and long life, the number of trips is small, the drilling cost is greatly reduced, and the price is superior. Customers can choose different types of PDC core drill bits according to the hardness and grinding degree of the cored formation.


How to choose PDC core drill bits?

The adaptability of different types of PDC core drill bits to different formation lithologies is very different. If the type is not properly selected, it will not only fail to achieve the purpose of efficient and fast drilling but will also seriously affect the quality of comprehensive logging. PDC core drill bits are mainly used in mudstone, sandstone, argillaceous cement-based, and loosely cemented small-grain conglomerate, gypsum, and limestone. Test statistics and field application conditions show that: for sand and mudstone interbeds, the compressive strength of the ground is less than 10% 2C000psi, and the mudstone composition accounts for more than 40% of the total rock, the PDC core drill bits is the best. Igneous rocks are generally not suitable for PDC core drill bits.

PDC core drill bits selects high-quality diamond composite sheet, which has the characteristics of wear resistance, high drilling efficiency, and constant quality.Hejian Hengji Bit Manufacture Co., Ltd is committed to providing high-quality PDC core drill bits all year round, with a complete assembly line and strict quality inspection department. We believe that our PDC core drill bits products will be your best choice.

 


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Hejian Hengji Bit Manufacture Co.,LTD  is specialized in researching and production of rock drilling bits since 2012, mainly includes tricone bits, PDC bits, HDD hole opener, foundation single roller cutters, drag bits and related tools with advanced CNC machines and R&D team.

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