Vibration-type rotary-jetting drill bit

Abstract

The invention discloses a vibration-type rotary-jetting drill bit, pertaining to the field of jetting drill bits. The vibration-type rotary-jetting drill bit at least comprises an expansion section, a drill bit body, an impeller, an eccentric motor, a baffle plate, and bearings. The right end of the drill bit is connected with the expansion section. The drill bit is internally provided with the impeller, the eccentric motor, and the baffle plate in order from the right to the left. The left end of the impeller is connected with a right end of the eccentric motor through one bearing. The left end of the eccentric motor is connected with a right end of the baffle plate through the other bearing. The baffle plate is in threaded connection with the drill bit body. The drill bit body and the surface of the expansion section are inlaid with diamonds. The additional arrangement of the eccentric motor enables the drill bit to vibrate by circumference and helps increase the range of the drill bit. Due to the additional arrangement of the impeller, more high-voltage water flows rotate, the hitting surface of jetting flow is broadened and drilling efficiency is increased. Bu additionally arranging the expansion section, service lifetime of the drill bit is prolonged and the rock breaking surface by jet flows is increased. By inlaying the diamonds on the surface of the drill bit, the effects of mechanically breaking rocks and shaping hole walls are achieved.

Description

technical field [0001] The invention relates to the field of jet drill bits, in particular to a vibrating rotary jet drill bit. Background technique [0002] With the continuous extraction of oil, the pressure of the underlying oil layer continues to decrease. In order to improve oil recovery efficiency, hydraulic jet radial drilling technology is usually used to increase the oil drainage area of ​​the original wellbore. Due to its strong rock-breaking drilling ability, the hydraulic jet radial drilling technology can realize a 90° turn from vertical to horizontal in the casing, and use the hydraulic rock-breaking effect of high-pressure water jets to drill 4 ~ 6 horizontal tiny boreholes, the radial drilling length can reach 100m, and the diameter can reach 25mm~50mm, which overcomes the shortcomings of the short radial aperture existing in the previous hydraulic deep penetration technology, and greatly increases the discharge of the original borehole Radius, to achieve th...

AI Technical Summary

Problems solved by technology

[0007] 3. It is easy to form a large boss in the middle of the drill hole, which hinders the advancement of the drill bit;

[0008] 4. The drill bit wears a lot during the drilling process, the service life of the drill bit is short, and the replacement frequency is high

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