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Measures to improve the service life of tooth wheel drill bits
Toothed wheel bits are the most widely used type of drilling bits. When the bit works, the cutting teeth contact the bottom of the well alternately, the breaking torque is small, the contact area between the cutting teeth and the bottom of the well is small, the specific pressure is high, and it is easy to eat into the formation; the total length of the working edge is large, so the wear is relatively reduced. The bit is able to adapt to a wide range of formations from soft to hard.
The lithology and hardness of the formation are different, and the rock crushing mechanism is different, which causes the drill bit failure in different forms. The rock physical and mechanical properties of the common formation lithology in drilling in various oil fields in my country have been measured.
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