Wells – Processes – With indicating – testing – measuring or locating
Patent
1989-08-07
1991-11-05
Melius, Terry L.
Wells
Processes
With indicating, testing, measuring or locating
166 651, 166100, 73151, E21B 4700
Patent
active
050624822
ABSTRACT:
A device is provided for installing multiple piezometers in a borehole at predetermined elevations. An inner support pipe which may be interconnected with a string of grouting pipe is utilized. A continuous fluid passageway for introduction of grout to the bottom of the borehole results by inclusion of the support pipe as an integral part of the string. A tray member is provided which carries a piezometer embedded in a layer of permeable material. The latter makes a hydraulic connection with the borehole wall. A spring assembly is adapted to move the tray outwardly and radially so as to bring the layer into contact with the borehole wall. A wire restrains the tray against the support pipe so as to permit the device to be inserted into the borehole. A messenger is inserted into the fluid passageway to sever the wires whereupon the spring expands, bringing the layer of permeable material into hydraulic connection with the borehole wall.
REFERENCES:
patent: 2262655 (1941-11-01), Seale
patent: 3677081 (1972-07-01), Newton et al.
patent: 3798966 (1974-03-01), Planche
patent: 3895527 (1975-07-01), McArthur
patent: 4665398 (1987-05-01), Lynch et al.
patent: 4715440 (1987-12-01), Boxell et al.
patent: 4775009 (1988-10-01), Wittrisch et al.
Alberta Oil Sands Technology and Research Authority
Melius Terry L.
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