Flow pulsing method and apparatus for the increase of the rate o

Details Flow pulsing method and apparatus for the increase of the rate o Flow pulsing method and apparatus for the increase of the rate o

1999-03-05

2000-04-25

Neuder, William

Boring or penetrating the earth

With means movable relative to tool below ground to stop...

With longitudinally spaced valve seats

175243, E21B 2110

Patent

active

060532610

ABSTRACT:
A simple and economical device is placed in a drill string to provide a pulsating flow of the pressurized drilling fluid to the jets of the drill bit to enhance chip removal and provide a vibrating action in the drill bit itself thereby to provide a more efficient and effective drilling operation. Operation of the device is such that a pronounced negative pulse precedes the positive pulse. Between pulses there is a short time delay and this feature will further enhance drilling rates. Device automatically bypasses all fluid if it is disabled.

REFERENCES:
patent: 4817739 (1989-04-01), Jeter
patent: 4819745 (1989-04-01), Walter
patent: 4830122 (1989-05-01), Walter
patent: 4905778 (1990-03-01), Jurgens
patent: 4979577 (1990-12-01), Walter
patent: 5190114 (1993-03-01), Walter

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