Wells – Processes – Producing foam or gas in well by foaming or gas producing...
Patent
1990-06-07
1991-10-08
Neuder, William P.
Wells
Processes
Producing foam or gas in well by foaming or gas producing...
166 63, 166311, 166369, E21B 4300
Patent
active
050545574
ABSTRACT:
Device for extracting a liquid out of a tube of great length closed at one of its ends in case a communication between the closed end and a source of a substitution fluid should be difficult to establish, the device includes a mobile member provided with a body connected to a supporting surface apparatus, a piston whose cross-section is adapted to the inner cross-section of the tube controlled valve means allowing for the running of the mobile member along the tube and means in the body for providing a substitution fluid such as liquified gas bottles or substances which provide a great volume of gas when combusted. Such a device is useful for example for emptying tube when production tests are conducted in oil wells,.
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Institut Francais du Pe'trole
Neuder William P.
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