Reversible rigid coupling apparatus and method for borehole seismic transducers
- Helotes, TX
An apparatus and method of high resolution reverse vertical seismic profile (VSP) measurements is shown. By encapsulating the seismic detector and heaters in a meltable substance (such as wax), the seismic detector can be removably secured in a borehole in a manner capable of measuring high resolution signals in the 100 to 1000 hertz range and higher. The meltable substance is selected to match the overall density of the detector package with the underground formation, yet still have relatively low melting point and rigid enough to transmit vibrations to accelerometers in the seismic detector. To minimize voids in the meltable substance upon solidification, the meltable substance is selected for minimum shrinkage, yet still having the other desirable characteristics. Heaters are arranged in the meltable substance in such a manner to allow the lowermost portion of the meltable substance to cool and solidify first. Solidification continues upwards from bottom-to-top until the top of the meltable substance is solidified and the seismic detector is ready for use. To remove, the heaters melt the meltable substance and the detector package is pulled from the borehole.
- Research Organization:
- Southwest Research Institute, San Antonio, TX (United States)
- DOE Contract Number:
- AC22-89BC14473
- Assignee:
- Southwest Research Institute (San Antonio, TX)
- Patent Number(s):
- US 5080190
- OSTI ID:
- 868125
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
rigid
coupling
apparatus
method
borehole
seismic
transducers
resolution
reverse
vertical
profile
vsp
measurements
shown
encapsulating
detector
heaters
meltable
substance
wax
removably
secured
manner
capable
measuring
signals
100
1000
hertz
range
selected
match
overall
density
package
underground
formation
relatively
melting
transmit
vibrations
accelerometers
minimize
voids
solidification
minimum
shrinkage
desirable
characteristics
arranged
allow
lowermost
portion
cool
solidify
continues
upwards
bottom-to-top
top
solidified
remove
melt
pulled
coupling apparatus
seismic detector
underground formation
borehole seismic
desirable characteristics
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