Wells – Processes – Assembling well part
Patent
1985-10-10
1987-09-15
Novosad, Stephen J.
Wells
Processes
Assembling well part
166236, 166228, 175 22, 175314, E21B 4308
Patent
active
046933182
ABSTRACT:
A well screen filter is formed with inner and outer concentric screens defining an annular filtering space filled with filtrating medium. A lower perforated plate supporting the filtrating materials has passages allowing transit of fine particles entrained into the filter with formation fluid to a sedimentation tube preventing clogging of the filtering pack. A top perforated plate may be provided to prevent clogging of upper back areas. Openings in the outer screen extend elevationally higher than corresponding openings in the inner screen so that as the filtrating materials compact during production the inner screen openings always remain covered by the pack. A method of installing the sand control filter is also disclosed, utilizing a wash down media of glass or polymer spheres surrounding the filter to assist in stabilization of formation sand when the well is initially placed in production. A jet shoe connected to the sand filter is also disclosed for directing working fluid in upward and downward directions to displace the wash down media into position surrounding the filter.
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patent: 3965981 (1976-06-01), D'Amiano
patent: 4064938 (1977-12-01), Fast
patent: 4526230 (1985-07-01), Kojicic
Neuder William P.
Novosad Stephen J.
Well Improvement Specialists, Inc.
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