Combined cutting PDC (polycrystalline diamond compact) bit provided with breaking hammer

Abstract

A combined cutting PDC (polycrystalline diamond compact) bit provided with a breaking hammer at least comprises a bit body and the breaking hammer, wherein the bit body is provided with a plurality of bit blades, a plurality of PDC cutting teeth for cutting rock are arranged on the bit blades, the bit body is provided with an inner flow passage as well as a plurality of cleaning holes formed between the bit blades, and the front end of the inner flow passage is communicated with the cleaning holes; at least one breaking hammer is arranged on the bit body and comprises a hammer body, a plurality of cutting units are arranged on the surface of the hammer body which is rotationally arranged at the front end of a bearing seat, and the rear end of the bearing seat is fixed on the bit body and communicated with the inner flow passage. Therefore, the technical problems of high rock abrasion ratio, difficulty in rock cutting, low rock breaking rate, fast wear and short service life of the bit when the bit is applied to an ultra-hard formation in a drilling process are solved, the defect of early damage to the bit when the bit is applied to a gravel formation is overcome, further, the service life of the bit can be prolonged, the drilling speed can be increased, and the drilling cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of drilling and exploration tools, in particular to a PDC drill bit with a combined breaking hammer cutting, which not only cuts rocks, but also rolls them, and also breaks and hammers them during operation, which can increase the drilling speed and is more practical for super drilling Hard wear-resistant formations and gravel formations. Background technique [0002] In the process of oil and gas field development, the speed and efficiency of drilling determine the speed of oil field development. In the process of drilling, when encountering a formation with extremely high abrasiveness, it is easy to cause the problems of slow PDC bit speed, fast wear of PDC composite sheet, and short life of the bit. Drilling cycle, drilling cost, and often the rocks in extremely hard formations are similar to quartz sandstone formations. Although they are hard, they have poor plasticity and viscosity. At this time, the u...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a breaker compound cutting PDC drill bit. In order to solve the technical problems of superhard formation, high rock wear ratio, difficult rock cutting, low rock breaking rate, fast wear and short drill bit life during drilling, And to overcome the defects of early damage of the drill bit in gravel formation, it can also improve the life of the drill bit, increase the drilling speed and reduce the drilling cost

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