Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Reexamination Certificate
2005-03-15
2005-03-15
Lobo, Ian J. (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
C367S911000, C181S102000, C181S104000, C181S401000
Reexamination Certificate
active
06868035
ABSTRACT:
A method and apparatus suitable for coupling seismic or other downhole sensors to a borehole wall in high temperature and pressure environments. In one embodiment, one or more metal bellows mounted to a sensor module are inflated to clamp the sensor module within the borehole and couple an associated seismic sensor to a borehole wall. Once the sensing operation is complete, the bellows are deflated and the sensor module is unclamped by deflation of the metal bellows. In a further embodiment, a magnetic drive pump in a pump module is used to supply fluid pressure for inflating the metal bellows using borehole fluid or fluid from a reservoir. The pump includes a magnetic drive motor configured with a rotor assembly to be exposed to borehole fluid pressure including a rotatable armature for driving an impeller and an associated coil under control of electronics isolated from borehole pressure.
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Dichenko et al, “Seperating device for the Sensing Element . . . ”, Sep. 1982, NEFT KHOZ, No. 9, pp 58-61 (abstract only herewith).*
Phillip B. West et al., “Clamping Systems for Large Downhole Seismic Sensor Arrays” Idaho National Engineering and Environmental Laboratory, Jun. 2001.
Bechtel BWXT Idaho, LCC
Lobo Ian J.
Trask Britt P.C.
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