PDC bit capable of achieving salvaging while drilling

Abstract

The invention discloses a PDC bit capable of achieving salvaging while drilling, and belongs to the technical field of bits. The PDC bit comprises a base with a plurality of radial chutes, spherical drill teeth are slidably mounted in the radial chutes, the spherical drill teeth slide on the base under the action of cams and springs, and a plurality of composite sheets for cutting are arranged on the spherical drill teeth; and a gear with a spline is coaxially and fixedly installed on the spherical drill teeth. An annular plate sliding in the axial direction of the bit is arranged in the PDC bit capable of achieving salvaging while drilling, a plurality of sets of fixed rods and rotating rods are arranged on the annular plate, splines are arranged on the fixed rods and the rotating rods, and the splines are used for driving the specific spherical drill teeth located in the bit to rotate. According to the PDC bit capable of achieving salvaging while drilling, when the composite sheets on the spherical drill teeth fall off, the spherical drill teeth are rotated, a working face is converted, the spherical drill teeth do not need to be replaced immediately, and the working efficiency is greatly improved. Meanwhile, the composite sheets are salvaged by rotating a winch installed on a shell, the conception is ingenious, and the cost is saved.

Description

Technical field [0001] The present invention relates to the field of drill bit, and in particular, there is a diamond bit with a diamond drill. Background technique [0002] The composite of the polycrystalline diamond thin layer is attached to the carbide composite sheet, referred to as a diamond composite sheet, referred to as PDC, diamond composite sheet, high wear resistance and high impact of hard alloy Sex, and the diamond layer can always maintain sharp cutting edges, and thus use soft to medium hard layers in oil and geological drilling, the composite sheets on the traditional PDC drill participate in the drilling process in the drilling process, for some hard The texture layer, which is very easy to cause damage to the composite sheet, and even the composite film falls. The traditional drill bit needs to be replaced immediately, and the drill is repaired. Otherwise, it will affect the use, replace the drill bit brings a lot. Invented, the application number is disclosed ...

AI Technical Summary

Problems solved by technology

This prior art realizes the life extension of the PDC bit through the buffer mechanism, but it cannot solve the technical problem of how not to affect the work efficiency when the diamond compact is damaged. At the same time, due to the high cost of the diamond compact, this prior art cannot realize Automatic salvage of dropped diamond compacts

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