Tool for preventing drill bit torque from being too high
An oversized, drill bit technology, applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problems of downhole drilling tools such as damage to measuring instruments while drilling, drilling tool breakage, and affecting drilling efficiency
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[0019] The tool for preventing excessive torque of the drill bit includes an upper joint 1, a disc spring 3, a cone sleeve 2, a push piece 4, a transmission shaft 5 and an output shaft 7; There is output shaft 7. The transmission shaft 5 and the output shaft 7 are reducing bodies respectively, and a seal 6 is arranged between the transmission shaft 5 and the output shaft 7 to prevent impurities in the wellbore from entering the drilling fluid flow path from between the transmission shaft 5 and the output shaft 7 .
[0020] The transmission shaft 5 is covered with a tapered sleeve 2, and a disc spring 3 is arranged between the tapered sleeve 2 and the upper joint 1. Mounting holes are evenly distributed on the circumference of the upper end of the transmission shaft 5, and push pieces 4 are movable in the mounting holes. There are four mounting holes and four push pieces 4 respectively.
[0021] The push piece 4 is T-shaped; the output shaft 7 corresponding to the push piece 4...
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