Drill bit with dual reaming rows

Details Drill bit with dual reaming rows Drill bit with dual reaming rows

1995-10-02

1997-09-30

Dang, Hoang C.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175378, 175408, E21B 1016

Patent

active

056718179

ABSTRACT:
A rolling cutter drill bit has multiple rows of gage reaming inserts mounted in the gage face of the cutters. A first interlocking row of gage reaming inserts is positioned on the gage face of a cutter in close proximity to the gage row, such that the reaming inserts are closely adjacent to the mouth of the gage insert sockets. A second non-interlocking row of gage reaming inserts is positioned on the gage face of the cutter such that the reaming insert sockets are a predetermined minimum distance from the gage insert sockets and first reaming row sockets, thereby enabling a maximum number of large diameter reaming inserts to be placed in the second reaming row. Both the first and second reaming row inserts are sized and placed to maintain a desired distance between all insert sockets without affecting the size and spacing of gage row inserts.

REFERENCES:
patent: 3727705 (1973-04-01), Newman
patent: 3952815 (1976-04-01), Dysart
patent: 4058177 (1977-11-01), Langford, Jr. et al.
patent: 4231438 (1980-11-01), Garner et al.
patent: 4832139 (1989-05-01), Minikus et al.
patent: 4940099 (1990-07-01), Deane et al.
patent: 5351770 (1994-10-01), Cawthrone et al.
patent: 5353885 (1994-10-01), Hopper, et al.
patent: 5407022 (1995-04-01), Scott et al.
patent: 5542485 (1996-08-01), Pessier et al.

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