Nozzle bore for high flow rates

Details Nozzle bore for high flow rates Nozzle bore for high flow rates

2006-05-09

2006-05-09

Tsay, Frank S (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S340000, C175S424000

Reexamination Certificate

active

07040423

ABSTRACT:
The present invention relates to a roller cone drill bit that has improved flow characteristics. The roller cone drill bit includes forming at least one relief region inside a bit body of the roller cone drill bit on a ledge formed between a fluid plenum and at least one of the fluid orifices. A method of locating the at least one relief region is also disclosed.

REFERENCES:
patent: 4759415 (1988-07-01), Pessier
patent: 5494122 (1996-02-01), Larsen et al.
patent: 5538093 (1996-07-01), Siracki et al.
patent: 5669459 (1997-09-01), Larsen et al.
patent: 6079507 (2000-06-01), Trujillo et al.
patent: 6142248 (2000-11-01), Thigpen et al.
patent: RE37006 (2001-01-01), Siracki et al.
patent: 6290006 (2001-09-01), Crawford
patent: 6311793 (2001-11-01), Larsen et al.
patent: 6571887 (2003-06-01), Nguyen et al.
patent: 6585063 (2003-07-01), Larsen
patent: 0 669 449 (1996-06-01), None
patent: 0 669 449 (1996-06-01), None
United Kingdom Combined Search and Examination Report for Appl. No. GB0504101.7; dated May 6, 2005; 6 pages.

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