Directional CDE drill bit suitable for hard rock stratum
A drill bit and formation technology, which is applied in the direction of drill bit, drilling equipment, earthwork drilling and production, etc., can solve the problems of difficulty in deflection, poor stability of drill bit, and reduced rock breaking efficiency, so as to achieve good rock breaking ability in hard formation, reduce drilling cost, The effect of improving drilling efficiency
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[0028] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.
[0029] The inventor noticed during the invention process that the PDC drill bit uses polycrystalline diamond composite sheets to cut rocks. When drilling into a stratum with dense rock cementation and poor drillability, the polycrystalline diamond composite sheets cannot eat into the rock, and the rock breaking method is changed from cutting. For grinding, the efficiency of rock breaking is reduced, and the life of the drill bit is shortened due to increased w...
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