Classification and comparison of advantages and disadvantages of single-tube diamond drill bits_Best Drilling Equipment (WUXI) Co., Ltd.

Two types of diamond drills have been active in the drilling industry - single and double. There are many types of drill bits derived from each type of drill bit. According to different geological conditions and exploration conditions, different types of drill bits should be selected, and the selection of drill bits is related to their own advantages and disadvantages. The following introduces the classification of single-tube diamond bits and the comparison of the advantages and disadvantages of various types of single-tube diamond bits.

1. Classification of single-tube diamond drill bits

Domestically, the commonly used single-tube diamond bit is mainly used for coring drilling, which has a higher effective footage than the non-coring bit for full drilling. There are three main types of single-pipe drills: electroplated diamond drills, hot-pressed sintered diamond drills and diamond composite drills:

1. Electroplated diamond drill bit

When electroplating the diamond bit, the diamond is encapsulated in the nickel layer by electroplating to form the diamond matrix working layer. Taking the gold diamond electroplating bit as an example, the diamond is evenly arranged in the nickel layer through advanced oxygen-free electroplating. After 20 days of repeated electroplating and final out-of-trough inspection, only qualified drill bits can be finally circulated to the market.

2. Hot pressing sintered diamond drill

The types of hot-pressed sintered diamond drill bits are similar to those of electroplated drill bits, except that the method of inserting the diamond into the matrix is ​​by hot-pressing sintering. At present, there are two formulas of hot-pressed drill bits on the market. One is represented by the golden drill bit factory. In the production process, high-grade diamond and tungsten carbide and other precious metals are uniformly mixed and then hot-pressed and sintered to form a metallurgical formula. The carcass is very outstanding in wear resistance, and at the same time, it will not slip when drilling into extremely hard rock layers; the other formula uses low-grade diamond and copper-nickel powder for hot-pressing sintering, which is relatively cheap, but its cost is low. Stability and wear resistance are low. 3. Diamond compact drill bit

There is a big difference between the diamond composite drill bit and the first two types of drill bits. It is composed of a diamond composite chip on the head and a rigid body. The composite chip is fixed on the rigid body teeth by high-frequency welding or flame welding. The drill bit is mainly The rock is scraped by the composite sheet to achieve the purpose of footage, and the footage method of the electroplated drill bit and the hot-pressed drill bit is cutting. Therefore, the main factor affecting the quality of the compact drill bit is the quality of the diamond compact. Although there are many types of compacts on the market, including helmet teeth, blade teeth, spherical teeth and triangular teeth, etc., the most widely used ones are Flat teeth have outstanding footage efficiency and wear resistance. The diamond layer and the alloy layer are the two major parts of the diamond composite sheet, and their quality and bonding method are the keys to determine the quality of the drill bit. The Golden Drill Bit Factory only uses the best diamond composite sheet in Asia - the Yellow River cyclone composite sheet, in addition to the footage efficiency In addition, the phenomenon of tooth chipping will not occur during use.

2. Comparison of advantages and disadvantages of single-tube diamond drill bits

The quality indicators of the diamond bit mainly include the drilling speed, the total footage of the bit and the consumption of diamond per unit footage.

1. Comparison of drilling speed

Because of the difference in the production process, the three types of drill bits are still very different in terms of drilling speed. Among them, the fastest drilling speed is definitely the electroplated diamond bit, followed by the hot-pressed sintered diamond bit, and finally the diamond compact bit. In particular, the electroplated drill bit can control the hardness of the drill bit by changing the electroplating process, and has a relatively wide range of drilling speed control; the hot-pressed drill bit uses tungsten carbide as the skeleton component, so its low carcass hardness can only be controlled at 10 About -15 degrees, it is far inferior to electroplating drill bits when drilling into extremely hard rock formations; the composite drill bit breaks the rock by scraping, so it can only drill into weathered or soft rock formations, generally drilling in openings Better footage efficiency for soft and broken rocks.

2. Comparison of head total footage

This parameter is greatly affected by rock properties. Generally, the wear resistance of hot-pressed drill bits is longer, followed by electroplated drill bits, and finally by composite drill bits. However, if it is to drill into broken formations, a 50-degree diamond bit or a diamond composite drill bit with a gold drill has a better price/performance ratio. It has a total footage of more than 50 meters, which is a great improvement over the 20-meter total footage of traditional composite drill bits.

3. The consumption of diamond per unit footage

Under the premise of the same hardness of the carcass, the hot-pressing drill bit consumes the least amount of footage due to its high strength and good wear resistance. Not too high. The consumption of different carcass hardness of electroplating drills is different, generally in the range of 1-2mm/10m. The consumption of the diamond composite drill bit cannot be measured by height. Usually, the rigid body consumes the complete diamond composite chip and has a surplus, which is also the embodiment of the high-quality Yellow River composite chip used by the gold drill.

In my country, the sales volume of single-tube diamond drill bits is high every year, and there is huge room for development. Although the fierce competition has produced extremely low-priced drill bit products, the captains' pursuit of high-quality drill bits will not change, especially drill bits. When entering extremely hard granite/quartzite/volcanic rock/siliceous rock formations, cheap diamond drill bits cannot achieve high ROP with low-quality diamonds. It is recommended to use gold drill 6-8 degree electroplated single-tube drill bits.