Cutting structure for rotary drill bits

Details Cutting structure for rotary drill bits Cutting structure for rotary drill bits

1998-03-23

2000-12-26

Tsay, Frank S.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175432, E21B 1046, E21B 1062

Patent

active

061643955

ABSTRACT:
A cutting structure for a rotary drag-type drill bit includes a cutting element mounted on a member on the bit body, which may be a carrier secured to the bit body or part of the bit body itself. The surface of the member on which the cutting element is mounted is formed with a groove, adjacent the cutting element. The downstream end of the groove is located near a nozzle in the bit body through which a jet of drilling fluid emerges, so that the groove directs to the front of the cutting element the flow of drilling fluid which impinges on the groove. An array of separate grooves may lead from the nozzle to different cutting elements. The flow of drilling fluid directed towards each cutting element serves to break up cuttings removed from the formation by the cutting element and to carry the cuttings away from the element.

REFERENCES:
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patent: 4538690 (1985-09-01), Short, Jr.
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patent: 4942933 (1990-07-01), Barr
patent: 5115873 (1992-05-01), Pastusek
patent: 5172778 (1992-12-01), Tibbitts et al.
patent: 5199511 (1993-04-01), Tibbitts et al.
patent: 5447208 (1995-09-01), Lund et al.

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