Diamond drill bit for well drilling

Abstract

The utility model relates to a diamond drill bit for well drilling, which comprises a mounting joint and a drill bit main body mounted at the lower end of the mounting joint, the drill bit main body comprises a first drill bit part and a second drill bit part, and the first drill bit part comprises a connecting column and a plurality of groups of adjusting mechanisms mounted outside the connecting column. The adjusting mechanism comprises a mounting plate mounted outside the connecting column, a mounting opening formed in the mounting plate and penetrating through one side of the mounting plate and a first wing plate slidably connected into the mounting opening, and the first wing plate is fixed into the mounting opening through an adjusting assembly. In the using process, the drilling diameter of the drill bit can be adjusted according to the size of a well mouth needing to be drilled, so that the drilling requirements of well mouths with different diameters can be met, and the situation that the construction progress is affected due to the fact that the drill bit is forgotten to be carried is avoided.

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