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Title: Reversible rigid coupling apparatus and method for borehole seismic transducers

Abstract

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.

Inventors:
 [1];  [1]
  1. Helotes, TX
Issue Date:
Research Org.:
Southwest Research Institute, San Antonio, TX (United States)
OSTI Identifier:
868125
Patent Number(s):
5080190
Assignee:
Southwest Research Institute (San Antonio, TX)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
AC22-89BC14473
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
reversible; 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; /181/367/

Citation Formats

Owen, Thomas E, and Parra, Jorge O. Reversible rigid coupling apparatus and method for borehole seismic transducers. United States: N. p., 1992. Web.
Owen, Thomas E, & Parra, Jorge O. Reversible rigid coupling apparatus and method for borehole seismic transducers. United States.
Owen, Thomas E, and Parra, Jorge O. Wed . "Reversible rigid coupling apparatus and method for borehole seismic transducers". United States. https://www.osti.gov/servlets/purl/868125.
@article{osti_868125,
title = {Reversible rigid coupling apparatus and method for borehole seismic transducers},
author = {Owen, Thomas E and Parra, Jorge O},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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