Universal earth formation cutter

Details Universal earth formation cutter Universal earth formation cutter

E - Fixed Constructions

21

B

255/74

E21B 10/00 (2006.01) E21B 10/16 (2006.01) E21B 10/52 (2006.01)

Patent

CA 1114361

UNIVERSAL EARTH FORMATION CUTTER Abstract of the Disclosure An earth boring system is provided with universal cutter means for boring in all types of formations. The cutter means is mounted on a drill bit body or cutterhead with said bit or cutterhead functioning to form a hole in the earth formations. At least two annular rows of major inserts are mounted in the cutter means. The major inserts project from the surface of the cutter means a substantial distance for forming circular kerfs in the earth formations being bored. An annular row of minor inserts are mounted in the cutter means between the two annular rows of major inserts. The minor inserts project from the surface of the cutter means a distance that is substantially less than the distance the major inserts project from the surface of the cutter means.

340522

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