Method of forming and assembling a self-cleaning helical spring

Details Method of forming and assembling a self-cleaning helical spring Method of forming and assembling a self-cleaning helical spring

1980-02-28

1981-10-06

Novosad, Stephen J.

Wells

Processes

Cleaning or unloading well

166233, 166315, 210106, 210356, B01D 2534, E03B 320, E21B 3708, E21B 4308

Patent

active

042930375

ABSTRACT:
Method for assembling a self-cleaning helical spring sand screen for use at the petroliferous unconsolidated sand strata of an oil well are disclosed. The basic method comprises (1) attaching a helical spring sand screen to the lower end of a production tube for being lowered into a well to the liquid level for producing sand-free liquid from the production tube, (2) mounting a spring biased valve means on the production tube, (3) providing valve means for the production tube for controlling the outlet thereof, and (4) connecting a source of high pressure liquid to the spring biased valve means for storing energy in its spring, for expanding its helical spring sand screen, and for ejecting liquid into its helical spring sand screen for expansion and cleaning thereof. The resultant self-cleaning helical spring sand screen is so formed that upon ceasing of flow of 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 method which forms and assembles a second modification is disclosed.

REFERENCES:
patent: 2837032 (1958-06-01), Horsting, Sr.
patent: 3120951 (1964-02-01), Finch
patent: 3179116 (1965-04-01), Jacobs
patent: 3230024 (1966-01-01), Gika
patent: 3754651 (1973-08-01), Lannoch
patent: 3901320 (1975-08-01), Calderon et al.
patent: 3937281 (1976-02-01), Harnsberger
patent: 4200150 (1980-04-01), Saadeh et al.

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