Mechanical plug device

Details Mechanical plug device Mechanical plug device

1995-06-06

1997-09-09

Schoeppel, Roger J.

Wells

Above ground apparatus

Well caps or casing heads

166 921, 166 931, 166 971, 285901, 138 89, E21B 3303

Patent

active

056646267

ABSTRACT:
A mechanical plug device for an environmental monitoring well is disclosed for sealing the exposed top end of a well casing in order to prevent pollutants from entering the monitoring well. The plug is lockable to prevent unauthorized access to the monitoring well. A valve assembly is attached to the plug so as to allow a user to selectively fluidly communicate with a sampling port and the interior of the monitoring well, thereby permitting fluid samples to be extracted through the plug without removing the plug from the well and without exposing the well interior to the outside atmosphere.

REFERENCES:
patent: D317270 (1991-06-01), Hensley
patent: D317271 (1991-06-01), Hensley
patent: 2760579 (1956-08-01), Kabakoff
patent: 4411312 (1983-10-01), English
patent: 4580629 (1986-04-01), Jaworowsky
patent: 4848458 (1989-07-01), Holdsworth et al.
patent: 4881597 (1989-11-01), Hensley
patent: 4942923 (1990-07-01), Geeting
patent: 4971149 (1990-11-01), Roberts
patent: 5295535 (1994-03-01), Boles et al.
patent: 5323854 (1994-06-01), Dursley
patent: 5348085 (1994-09-01), Benson
patent: 5380125 (1995-01-01), Croy
patent: 5437309 (1995-08-01), Timmons
patent: 5509757 (1996-04-01), Croy
MWSS Inc., Monitoring Well "J" Plug, 1 p (Model Nos. J-102P & J-104P).

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