The invention discloses a PDC (
polycrystalline diamond compact)-impregnated segment
hybrid self-adaptive
drill bit, consisting of a steel matrix, a plurality of self-adaptive elements and a plurality of PDC tooth-impregnated segment
hybrid cutter wings, wherein the PDC tooth-impregnated segment
hybrid cutter wings are fixedly arranged on the steel matrix by pin shafts, and the plurality of self-adaptive elements are respectively and fixedly arranged between the steel matrix and the PDC tooth-impregnated segment hybrid cutter wings; when the PDC-impregnated segment hybrid self-adaptive
drill bit is used for drilling soft to medium hard formations, a PDC
drill bit plays a main role of
cutting; when the PDC-impregnated segment hybrid self-adaptive
drill bit is used for drilling a hard formation,
a diamond-impregnated bit plays a main role of crushing rocks; therefore, the
adaptation of the
drill bit to the formations is greatly improved, the characteristic of efficiently crushing the rocks of the
drill bit is also maintained, and the drill bit replacement times are reduced. The PDC-impregnated segment hybrid self-adaptive drill bit is simple in structure, is provided with the conveniently-disassembled cutter wings, and integrates the advantages of the PDC drill bit and the
diamond-impregnated bit, thus greatly improving the
adaptation of the drill bit to the formations, and being not only capable of maintaining the drill bit to efficiently crush the rocks, but also reducing the
impact and damage of the formations to PDC teeth.