Drill bit cutting element

Details Drill bit cutting element Drill bit cutting element

1994-12-19

1996-07-09

Dang, Hoang C.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175432, E21B 1046

Patent

active

055335829

ABSTRACT:
A full cutting element including a substantially cylindrical backing and cutter mounted thereon is cut generally along the length thereof to produce a pair of semicylindrical partial cutting elements. In the case of an unused cutting element, each partial cutting clement is mounted on a different semicylindrical tungsten carbide base to produce a substantially cylindrical unit which is mounted on a bit using a low temperature braze. In the case of a used full cutting element, the cutting clement is cut to separate the worn portion from the remainder of the bit and only the unused portion is used to form a cylindrical unit with a corresponding semicylindrical tungsten carbide base. In another aspect, a partial cutting element is received in a pocket formed on a bit body. The pocket includes a pair of opposed side surfaces which substantially flushly abut the curved surfaces of the backing on the partial cutter.

REFERENCES:
patent: 4200159 (1980-04-01), Peschel et al.
patent: 4221270 (1980-09-01), Vezirian
patent: 4244432 (1981-01-01), Rowley et al.
patent: 4373410 (1983-02-01), Davis
patent: 4498549 (1985-02-01), Jurgens
patent: 4606418 (1986-08-01), Thompson
patent: 4705122 (1987-10-01), Wardley et al.
patent: 4877096 (1989-10-01), Tibbitts
patent: 5011515 (1991-04-01), Frushour
patent: 5348109 (1994-09-01), Griffin
patent: 5373908 (1994-12-01), Pastusek

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