Continuous positive flow backflash prevention system

Details Continuous positive flow backflash prevention system Continuous positive flow backflash prevention system

2007-01-02

2007-01-02

Bates, Zakiya W. (Department: 3676)

Boring or penetrating the earth

Processes

Boring with specific fluid

C175S209000, C431S346000

Reexamination Certificate

active

10860097

ABSTRACT:
A method and system for the prevention of backflash from an ignition source in a flare stack to a separator or wellbore particularly during drilling and production. A continuous positive flow of air or exhaust gas is provided into the flow of gases from the wellbore or the separator to ensure that the velocity of the flow is always higher than the velocity at which the flame can propagate backwards into either the separator or the wellbore. This method and system is particularly applicable to balanced, underbalanced and air drilling operations where the flow of gas from the wellbore is intermittent and unpredictable and can stop and start during connection and disconnection of the air used as the drilling fluid.

REFERENCES:
patent: 3463227 (1969-08-01), Smith
patent: 3990835 (1976-11-01), Burton, III
patent: 4865820 (1989-09-01), Dunster et al.
patent: 4872949 (1989-10-01), Wilwerding
patent: 4909730 (1990-03-01), Roussakis et al.

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