PDC drill bit suitable for double-pendulum speed-increasing drilling tool

Abstract

The invention relates to the technical field of PDC drill bits, in particular to a PDC drill bit suitable for a double-pendulum speed-increasing drilling tool. The PDC drill bit comprises a drill bitbody, cutting blades, main cutting teeth, reversed hole teeth, edge teeth, gauge teeth and rock breaking tine teeth; the cutting blades are circumferentially distributed at intervals around the drillbit body, the gauge teeth are distributed on the outer side faces of gauge parts of the cutting blades, the rock breaking tine teeth are distributed on the outer side faces of the noses of the cuttingblades, and the tooth tops of the rock breaking tine teeth are higher than those of the main cutting teeth. The PDC drill bit suitable for the double-pendulum speed-increasing drilling tool has the advantages that the rock breaking tine teeth are arranged to pre-break a stratum during drilling and release formation stress, thereby improving the rock breaking efficiency of the main cutting teeth and protecting the main cutting teeth to reduce abrasion; the PDC drill bit is suitable for the double-pendulum speed-increasing drilling tool, so that the combination of the PDC drill bit and the double-pendulum speed-increasing drilling tool can improve the entire drilling speed, stability is kept in a vertical well section, the wellbore quality is good, the drill bit is not stuck easily, the inhibition effect of the drilling tool on drill bit eddy can be also improved, and the purpose of assisting in speed increasing is achieved.

Description

technical field [0001] The invention relates to the technical field of PDC drill bits, and relates to a PDC drill bit suitable for double-pendulum speed-increasing drilling tools. Background technique [0002] In existing drilling operations, the more uniform the force on the drill bit, the more stable the movement of the drill bit at the bottom of the well; when the force on the drill bit is not uniform, the movement at the bottom of the well is irregular, which will cause the bit to whirl. After many years of use of PDC bit, the feedback information shows that the whirl of the PDC bit severely damages the cutting teeth, making it unable to perform the normal cutting efficiency, which has a great impact on the efficiency of the bit. Only by preventing the whirl of the drill bit can effectively reduce the cracking and cracking of the composite cutting teeth, which is beneficial to improve the drilling footage and service life of the drill bit. [0003] When the PDC bit is d...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a PDC drill bit suitable for double-pendulum speed-increasing drilling tools, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of low mechanical drilling speed and the pairing of the existing PDC drill bits with double-pendulum speed-increasing drilling tools. The bit whirl suppression effect is poor, and it is difficult to achieve the purpose of auxiliary speed increase

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