E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/2, 166/66
E21B 49/00 (2006.01) E21B 47/00 (2006.01)
Patent
CA 1307197
"PIEZOMETER ACTUATOR DEVICE AND METHOD FOR ITS INSTALLATION IN A BOREHOLE" ABSTRACT OF THE DISCLOSURE 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.
607801
Alberta Science And Research Authority
Johnson Ernest Peter
LandOfFree
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