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The cutting blade is named diamond bit, integrative drilling bit. and no movement spare-parts on it, simple construction, ability to high strength, wear-resisting, anti-impact, it is the one of new drilling technology in the world in 80's of the 20th century ,the site operations demonstrate that there are so many advantage when diamond bit was drilling ,such as drilling fast, drilling depth, long life, steadily, lower downhole problems, good wellbore quality, not only long service life but also refusing, can save drilling cost.
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