Method for cleaning a helical spring sand screen

Details Method for cleaning a helical spring sand screen Method for cleaning a helical spring sand screen

1979-02-16

1980-10-14

Novosad, Stephen J.

Wells

Processes

Cleaning or unloading well

291635CW, 166205, 210106, 210356, E21B 3708, E21B 4308

Patent

active

042275768

ABSTRACT:
Methods for cleaning sand from a helical spring sand screen for use at the petroliferous unconsolidated sand strata of an oil well are the basic steps: (1) ceasing flow from the production tube, (2) injecting high pressure liquid into a reciprocal valve means for expanding the helical spring sand screen, and (3) injecting more high pressure liquid into the helical spring sand screen for cleaning thereof. Then upon ceasing of flow of the high pressure liquid, the stored energy in another spring contracts the helical spring sand screen for restoring production of sand-free oil from the production tube. A second modification is disclosed.

REFERENCES:
patent: 2837032 (1958-06-01), Horsting, Sr.
patent: 3179116 (1965-04-01), Jacobs
patent: 3667615 (1972-06-01), Likness
patent: 3754651 (1973-08-01), Lannoch
patent: 3850802 (1974-11-01), Berger
patent: 3901320 (1975-08-01), Calderon et al.
patent: 3937281 (1976-02-01), Harnsberger

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