摘要 :
An important way to improve overall drilling efficiency is to crease each bit's life and footage,, high matrix diamond coring bits are especially used in deep hole. In this paper, the brazing process of designing and manufacturing...
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An important way to improve overall drilling efficiency is to crease each bit's life and footage,, high matrix diamond coring bits are especially used in deep hole. In this paper, the brazing process of designing and manufacturing high matrix diamond coring bit was introduced. Firstly, impregnated diamond blocks were manufactured using hot pressing method; secondly, new drill bit steel body including waterway was processed; in the end, the impregnated diamond blocks was welded on the new drill bit steel body using brazing process. Using brazing process, a φ75/54.5 two-stage high matrix diamond coring bit was developed, its work layer is 15 mm, the experimental results showed that the drilling efficiency increased, and the bit life improved over 50% comparing with the conventional impregnated diamond coring bit. And then, a φ75/54.5 three-stage high matrix diamond coring bit was developed, its work layer is 22 mm, and the bit life improved over 120%.
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摘要 :
Bionic coupling bit has much advantage, such as high drilling efficiency and long life. In order to research on the matrix wear resistance of bionic coupling bit, based on the bionic coupling theory, 9 samples were designed and pr...
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Bionic coupling bit has much advantage, such as high drilling efficiency and long life. In order to research on the matrix wear resistance of bionic coupling bit, based on the bionic coupling theory, 9 samples were designed and processed according to orthogonal test table, and then the abrasion ratio of each sample was tested. With extreme difference analysis method the test data was analyzed, the results showed that the non-smooth shape has an important impact on wear resistance of matrix, and the primary factor is non-smooth ratio, and then diameter of bionic unit and diamond concentration. The optimal combination is A1B2C3 that is non-smooth 9%, pit diameter 1.5mm and diamond concentration 125%.
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