Blade stabilizer provided with at least one fluid passage having

Details Blade stabilizer provided with at least one fluid passage having Blade stabilizer provided with at least one fluid passage having

1979-02-12

1981-01-20

Leppink, James A.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

175339, 308 4A, E21C 900

Patent

active

042457084

ABSTRACT:
A stabilizer for a tool, such as a rotary drill bit, comprises at least two blades spaced radially about the axis of the tool. Two adjacent blades define a venturi-shaped free angular space for a flow of drilling fluid. The width of each of the blades increases over at least a first portion, measured from the lower end of the blade, of the height of each blade. The height of the first portion is at least equal to one half of the width of the lower end of the free angular space.

REFERENCES:
patent: 2247564 (1941-07-01), Turner
patent: 3320004 (1967-05-01), Garrett
patent: 3933395 (1976-01-01), Evans

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