Tubing hanger seal for water wells

Details Tubing hanger seal for water wells Tubing hanger seal for water wells

1993-05-10

1994-06-28

Dang, Hoang C.

Wells

Above ground apparatus

Well caps or casing heads

166 82, 166 85, 285140, 285147, E21B 3304

Patent

active

053238540

ABSTRACT:
A water well installation includes a seal to prevent animals, insects, roots, dirt, dust or other debris from entering the well through the annulus between the casing and tubing strings. The seal comprises a flat, resilient hard rubber disc having a central opening closely receiving the tubing string therein. The rubber disc is supported on the upper exposed end, either a collar or a tube end, of the casing string or on the top of a concrete pad if one has been poured around the water well.

REFERENCES:
patent: 1297562 (1919-03-01), Haney
patent: 1498075 (1924-06-01), Dale
patent: 1519457 (1924-12-01), Hudson
patent: 1646639 (1927-10-01), Crowell
patent: 1703160 (1929-02-01), Morlang et al.
patent: 1904926 (1933-04-01), Peters
patent: 2173037 (1939-09-01), Dailey
patent: 2214208 (1940-09-01), Spreng
patent: 2556384 (1951-06-01), Zeitz
patent: 4291767 (1981-09-01), Hall, Jr.

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