Large diameter borehole apparatus

Details Large diameter borehole apparatus Large diameter borehole apparatus

1986-07-14

1988-11-15

Tarcza, Thomas H.

Acoustics

Geophysical or subsurface exploration

Well logging

367911, 324367, 166212, G01V 140

Patent

active

047842385

ABSTRACT:
Apparatus for positioning a detector at a plurality of depth locations within a large diameter borehole includes an elongated body member having a pair of diametrically opposed hydraulic pad displacement members mounted thereon. A pad mounting member is pivotally attached to each pad displacement member and a pair of borehole wall contacting members are pivotally attached to each pad mounting member. A signal detector is mounted behind one or more of the pad members. At each test depth a hydraulic power system deploys the pad displacement members from the body member to an extended position and extends the wall engaging pad members into contact with the borehole wall.

REFERENCES:
patent: 4117394 (1978-09-01), Souhaite
patent: 4251773 (1981-02-01), Cailliau et al.
patent: 4563757 (1986-01-01), DeCorps et al.
patent: 4575831 (1986-03-01), DeCorps et al.
patent: 4614250 (1986-09-01), Panette et al.
patent: 4670862 (1987-06-01), Staron et al.
patent: 4686653 (1987-08-01), Staron et al.

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