Method for cleaning a sand screen

Details Method for cleaning a sand screen Method for cleaning a sand screen

1979-10-03

1981-06-16

Novosad, Stephen J.

Wells

Processes

Cleaning or unloading well

166205, 166231, 166232, 210108, F21B 3708, F21B 4308

Patent

active

042731925

ABSTRACT:
A method for cleaning a helical spring screen deep in a well while filtering liquid comprises (1) injecting a high pressure hydraulic surge pulse into the spring screen for expanding the coils, (2) forcing high pressure liquid between the coils of the helical spring screen simultaneously with expanding of the coils for washing the sand from between the coils, and (3) forcing the coils together following their expansion by expanding action of a second spring for crushing and dislodging any sand therebetween the coils for removal upon subsequent spreading of the coils. A second method is disclosed likewise. Thus the methods provide for the spring coils being cleaned for a multiplicity of times without having to shut the well in for workover, thus saving workover costs and lost production.

REFERENCES:
patent: 2280054 (1942-04-01), Beck
patent: 2342669 (1944-02-01), Hoffman
patent: 2729294 (1956-01-01), Adams
patent: 2744579 (1956-05-01), Gerhardt
patent: 3561605 (1971-02-01), Likness
patent: 3584685 (1971-06-01), Boyd
patent: 3883162 (1975-05-01), Colburn
patent: 3937281 (1976-02-01), Harnsberger
patent: 4090962 (1978-05-01), Braukmann
patent: 4180463 (1979-12-01), Calderon

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