Wells – With below and above ground modification – With below ground screen
Patent
1980-02-28
1981-04-07
Novosad, Stephen J.
Wells
With below and above ground modification
With below ground screen
166205, 166231, 210106, 210356, 2104971, 267 74, B01D 2534, E03B 318, E21B 3708, E21B 4308
Patent
active
042600162
ABSTRACT:
A self-cleaning helical spring sand screen for use at the petroliferous unconsolidated sand strata of an oil well are disclosed. The sand screen comprises a hydraulically actuated, spring based spool valve connected to the upper end of the sand screen for receiving liquid under high pressure, for storing energy in the spring, for expanding the helical spring sand screen, and for ejecting 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 restorating production of sand-free oil from the production tube. A second modification is disclosed.
REFERENCES:
patent: 2569748 (1951-10-01), Grave
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.
Kulason Robert A.
Nichols Theron H.
Novosad Stephen J.
Ries Carl G.
Texaco Inc.
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