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The use of thin-wall drill bit of YiKuang Science and Technology
Release time:
2019-07-13
Author:
Source:
Shandong Yikuang Science and Technology Drill Pipe, Spiral Drill Pipe, Geological Drill Pipe-Sales Hotline: 13508920928,0635-2311078
The use of thin-walled drill
Thin-walled drill bits are used in addition to the production of raw materials.30% naturalPDCIn addition, there has been great progress in drilling efficiency. toFor example, the 200 high-speed drilling rig drills granite. The drill bit is gradually increased to 4th gear after 5 minutes of initial grinding and smooth drilling. The shaft input speed reaches 1000r/min, the main shaft speed reaches 600r/min, the initial WOB is 0.2Mpa, and the footage in a single hour can reach nearly 3 meters. Through a large number of early practice data statistics: when drilling hard rock thin-walled drill footage efficiency can reach 2-3 m/h. Compared with the regular 6-8 degree drill bit, there is a great improvement.
For many customers who have never used gold drill thin-walled bits, how to adjust the drilling parameters is a problem. BecauseBeneficial Mining TechnologyThis article is hereby compiled for the reference of your drilling colleagues. The following points should be noted:
First,PDCThe difference between thin-walled drill bits and regular drill bits
The biggest difference is the use of thin-walled drill bitsPDCThe production process is the same as regular drill bits, that is, the product quality is stabilized and the performance of the drill bit is improved.
Second,30% naturalPDCApplication range and drilling parameters of thin-walled drill bits
The original intention of the thin-walled drill bit design is to solve the problem of slow footage or skidding in the drilling process. Although the gold diamond6-8 degreesPDCThe drill bit can have relatively good footage efficiency when drilling into hard rock formations, but it requires high mechanical properties of the drill. Many captain pressurize violently for the sake of footage efficiency, which is very easy to give low-hardness matrix6-8 degree drill bit causes hard damage, making the surfacePDCThe shedding in turn affects the efficiency of the footage. Therefore, the thin-walled drill bit is designed to make up for the above-mentioned shortcomings of the regular drill bit, specifically for extremely hard rock formations, and to achieve efficient drilling. Therefore, the application range of thin-walled drill bits can be all kinds of rock formations, and it is also possible to drill into softer rock formations without considering the drilling cost. In terms of pressure due to naturalPDCHigh grade, able to withstand the drilling process of high speed and low bit pressure. In terms of drilling parameters, the spindle speed (via gearbox) is recommendAbove 600 r/min, the WOB recommend can have 0 WOB when the hole depth exceeds 30 meters, and the water volume is recommend the allowable maximum flow without suppressing the pump.
Third,PDCWhat are the disadvantages of thin wall drill
Although thin-walled bits have great advantages in the efficiency of the footage, the new production process and the thinner bit matrix still inevitably have the following disadvantages:
1, production capacity can not keep up:PDCAll are imported, the price is high, and the quantity of raw materials purchased is limited by customs and distributors. Therefore, thin-walled drill customers are currently limited to purchase.5, the late production will be gradually liberalized.
2. The price does not go down: the high production cost and the soaring raw material price are difficult to make the thin-walled drill bit achieve the people's price, under the premise of ensuring the qualitybeneficial mineTry to maximize the benefits to consumers.
3, wear resistance in general: the thin rigid body and the matrix itself is doomed to be not as wear-resistant and regular drill bits, the current statistical data is that its service life is about 20-40 meters (according to the hardness of the rock and the degree of fragmentation is different).
Due to the thin-walled drill bit production process and6-8 degree drill bit is consistent, the current matrix hardness is only low. Many customers apply a weight of more than 0.6Mpa at the beginning of the new drill bit, and the soft matrix is not enough to consume such a large weight, which is easy to cause the surface.PDCMechanical abrasion. When the rigid body or matrix of the drill bit is worn to a large extent, it is recommended that the captain replace a new drill bit to continue drilling, especially for deep hole drilling, the risk of drilling tools falling should be avoided as much as possible.
Key words:
Drill pipe, geological drill pipe, spiral drill pipe, triangular drill pipe, rib drill pipe, new coal drill pipe
