Downhole tool and method

Details Downhole tool and method Downhole tool and method

2008-09-30

2008-09-30

Wright, Giovanna C (Department: 3672)

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

C367S083000, C166S386000

Reexamination Certificate

active

10929345

ABSTRACT:
A downhole tool for generating a fluid pressure pulse, and to a method of generating a fluid pressure pulse downhole. One example being, an improved downhole tool and method for transmitting data signals from a downhole environment to surface, the downhole tool comprising a fluid actuated flow restrictor; a first fluid flow path for flow of actuating fluid to actuate the flow restrictor; a second fluid flow path for flow of actuating fluid to actuate the flow restrictor; and a control member movable between a first closed position where the first fluid flow path is closed and the second fluid flow path is open, and a discrete second closed position where the first fluid flow path is open and the second fluid flow path is closed, for controlling actuation of the flow restrictor to generate a fluid pressure pulse.

REFERENCES:
patent: 3958217 (1976-05-01), Spinnler
patent: 4742498 (1988-05-01), Barron
patent: 5473579 (1995-12-01), Jeter
patent: 6125933 (2000-10-01), Ross
patent: 2 083 104 (1981-07-01), None

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