Drill bit with dispersed cutter inserts

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Patent

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Details

175410, E21B 1052

Patent

active

044415664

ABSTRACT:
An earth boring drill bit has hard metal inserts in its cutter shells that are spaced to eliminate rows. Each insert has a surrounding boundary zone with inner and outer loops corresponding to the minimum and maximum desired distances between centerlines of inserts, respectively. Each insert has at least one insert located randomly in its boundary zone. In selecting the locations, a first insert is arbitrarily located. The location of a second insert is randomly selected within the boundary zone of the first insert. The location of a third insert is randomly located within the boundary zone of the second insert, so long as it does not come any closer to the first insert than the minimum desired distance between inserts. Each succeeding insert is chosen in this manner.

REFERENCES:
patent: 2230569 (1941-02-01), Howard et al.
patent: 2626128 (1953-01-01), Boice
patent: 2774571 (1956-12-01), Morlan
patent: 3726350 (1973-04-01), Pessier
patent: 4187922 (1980-02-01), Phelps
patent: 4248314 (1981-02-01), Cunningham et al.

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