Dual property hydraulic configuration

Details Dual property hydraulic configuration Dual property hydraulic configuration

2007-05-08

2007-05-08

Gay, Jennifer H. (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S339000, C175S393000

Reexamination Certificate

active

10728650

ABSTRACT:
A rotary cone rock bit includes one or more hole cleaning nozzles and one or more bit cleaning nozzles. The hole cleaning nozzles of one drill bit define a projected fluid path disposed at a lateral angle of less than six degrees in order to achieve a large impingement pressure on the hole bottom. The bit cleaning nozzles of the same drill bit define a projected fluid path disposed at a lateral angle of at least six degrees in order to pass within 0.5 inches of the teeth on leading edge of the lagging roller cone. This results in a drill bit that both cleans the bottom hole and cleans cone inserts.

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International Search Report for Application No. GB0426396.8, dated Jan. 27, 2005 (1 p.).

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