Method and apparatus for cleaning a screened well

Details Method and apparatus for cleaning a screened well Method and apparatus for cleaning a screened well

1976-06-18

1977-07-26

Novosad, Stephen J.

Wells

Processes

Cleaning or unloading well

166223, E21B 3700, E21B 4325

Patent

active

040376613

ABSTRACT:
A system for developing or cleaning a screened well using dual concentric drill pipe. A blind annulus injection sub and a development head are interconnected with the drill pipe and so constructed that compressed air passing down the inner pipe is directed through nozzles in the head to agitate formation water and clear the screen. When air is passed down the pipe annulus it is injected into the inner pipe and causes formation water and sand to be drawn into the head and airlifted to the surface through the inner pipe.

REFERENCES:
patent: 1484601 (1924-02-01), Carmichael
patent: 1558796 (1925-10-01), Dunn
patent: 1774640 (1930-09-01), Dunn
patent: 2362403 (1944-11-01), Reynolds
patent: 2687774 (1954-08-01), Hodges
patent: 3547191 (1970-12-01), Malott
patent: 3760878 (1973-09-01), Peevey

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