Wells – With below and above ground modification – With receptacle for insertion into well
Reexamination Certificate
2005-08-01
2008-03-25
Bagnell, David (Department: 3672)
Wells
With below and above ground modification
With receptacle for insertion into well
C166S369000, C294S068220
Reexamination Certificate
active
07347256
ABSTRACT:
Well fluid extraction apparatus includes a resiliently downwardly biased discharge head and a canister lowerable from the discharge head into the well to receive fluid therefrom, and then liftable into telescoped engagement with the discharge head. A specially configured seal structure between the discharge head and canister resiliently exerts a downward releasing force on the raised canister to facilitate its subsequent separation from the discharge head. An embodiment of the discharge head is pressure balanced to prevent gas pressure in the well from driving it upwardly. Leveling structure is provided for operatively connecting the apparatus to the vertically sloped upper end of a well casing and vertically leveling the connected apparatus.
REFERENCES:
patent: 1145158 (1915-07-01), Mapes
patent: 1372031 (1921-03-01), McKissick
patent: 1447992 (1923-03-01), Layne et al.
patent: 1523604 (1925-01-01), Miller
patent: 1603675 (1926-10-01), Folsom et al.
patent: 2078322 (1937-04-01), Gage
patent: 2130026 (1938-09-01), Purtle et al.
patent: 2145753 (1939-01-01), Coulter
patent: 2180864 (1939-11-01), Connor
patent: 2661697 (1953-12-01), Long et al.
patent: 2965511 (1960-10-01), Morehead
patent: 2990780 (1961-07-01), Kreuter
patent: 3034440 (1962-05-01), Hermanson
patent: 3075466 (1963-01-01), Agnew et al.
patent: 3113522 (1963-12-01), Coberly
patent: 3527298 (1970-09-01), Zerb et al.
patent: 3963374 (1976-06-01), Sullivan
patent: 3998568 (1976-12-01), Hynd
patent: 4086035 (1978-04-01), Klaeger, Jr. et al.
patent: 4439113 (1984-03-01), Owen
patent: 4583916 (1986-04-01), Senghaas et al.
patent: 4603735 (1986-08-01), Black
patent: 4678040 (1987-07-01), McLaughlin et al.
patent: 4940088 (1990-07-01), Goldschild
patent: 5028213 (1991-07-01), Dickinson et al.
patent: 6039544 (2000-03-01), Strickland
patent: 6216789 (2001-04-01), Lorsignol et al.
patent: 6352117 (2002-03-01), Strickland
patent: 6460622 (2002-10-01), Rice
patent: 6464012 (2002-10-01), Strickland
patent: 7007751 (2006-03-01), Eggleston
patent: 2004/0020637 (2004-02-01), Eggleston
Andrews David
Bagnell David
Eggleston Philip W
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