PDC (polycrystalline diamond compact) bit for oil drilling

Abstract

The invention discloses a PDC (polycrystalline diamond compact) bit for oil drilling, and belongs to the technical field of oil production devices. The technical scheme includes that the PDC bit comprises a drilling rod and a bit body and is characterized in that the drilling rod and the bit body are screwed, a primary bit wing, a secondary bit wing and six nozzles are arranged on the bit body, PDC cutting teeth are arranged on the primary bit wing and the secondary bit wing, the six nozzles are uniformly distributed, a guide drill is arranged at the center of the top of the bit body, and the guide drill is a cross bit. Compared with the prior art, the PDC bit has the advantages of reasonable structural design and safety and reliability in use, stability and impact resistance of the bit are effectively improved, the service life of the bit is prolonged, inclination of a drill hole can be prevented, and cost is saved while drilling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of oil exploitation equipment, in particular to a PDC drill bit for oil drilling. Background technique [0002] At present, the PDC bit is a drilling bit specially used for oil and gas fields to replace the old roller cone drill. The output of the "three high" products. During the drilling process, the PDC bit has performance advantages such as high drilling speed, low drilling pressure, and high footage. Its application in the drilling process can greatly reduce the production cost of the oil field, speed up the production speed, and improve the economic benefits of the oil field. The PDC drill bit in the prior art is generally of one-piece structure. When the head of the drill bit is worn out, the whole drill bit needs to be replaced, which not only wastes materials, but also greatly increases the cost of use. At the same time, during the drilling process of the PDC bit, it is easy to cause the drilled h...

AI Technical Summary

Problems solved by technology

The PDC drill bit in the prior art is usually a one-piece structure. When the head of the drill bit is worn out, the whole drill bit needs to be replaced, which not only wastes materials, but also greatly increases the cost of use.

At the same time, during the drilling process of the PDC bit, it is easy to cause the drilled hole to tilt. In order to prevent the hole from tilting, it is usually necessary to reduce the speed of the PDC bit, or use a thinner drill bit to drill a straight hole first, and then use The PDC bit reams the hole, which leads to low drilling efficiency and affects the mining speed

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