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Title: Pneumatic wall-locking geophone system

Abstract

A seismic signal receiving system is provided for use in boreholes to receive seismic waves in carrying out geophysical investigations. The system includes three pairs of opposed plates, each of the pairs of plates including oppositely facing outer surfaces for engagement with opposite sides of a borehole. A seismic receiver is mounted on the inner surface of each of the plates for receiving seismic signals. A double-acting, fluid-operated actuator selectively causes relative movement of the plates of the pairs of plates away from each other to provide expansion thereof so as to enable the plates to engage the walls of a borehole and selectively causes relative movement of the plates of the pairs of plates toward each other to provide retraction thereof so as to enable the system to be removed from a borehole. The pairs of plates each comprise a relatively long plate and a relatively short plate. An expandable linkage interconnects the long plates at the distal ends thereof. The plates are mechanically biassed into the retracted state so that the plates return to this state in the event of a system failure.

Inventors:
 [1];  [1];  [2]
  1. Minneapolis, MN
  2. Apple Valley, MN
Issue Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
868041
Patent Number(s):
5060751
Assignee:
United States of America as represented by Secretary of (Washington, DC)
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pneumatic; wall-locking; geophone; seismic; signal; receiving; provided; boreholes; receive; waves; carrying; geophysical; investigations; pairs; opposed; plates; including; oppositely; facing; outer; surfaces; engagement; opposite; borehole; receiver; mounted; inner; surface; signals; double-acting; fluid-operated; actuator; selectively; causes; relative; movement; provide; expansion; enable; engage; walls; retraction; removed; comprise; relatively; plate; expandable; linkage; interconnects; distal; mechanically; biassed; retracted; return; event; failure; outer surfaces; inner surface; outer surface; relative movement; provide expansion; seismic receiver; oppositely facing; seismic waves; /181/175/367/

Citation Formats

Kuhlman, Harland L, Cumerlato, Calvin L, and Tweeton, Daryl R. Pneumatic wall-locking geophone system. United States: N. p., 1991. Web.
Kuhlman, Harland L, Cumerlato, Calvin L, & Tweeton, Daryl R. Pneumatic wall-locking geophone system. United States.
Kuhlman, Harland L, Cumerlato, Calvin L, and Tweeton, Daryl R. Tue . "Pneumatic wall-locking geophone system". United States. https://www.osti.gov/servlets/purl/868041.
@article{osti_868041,
title = {Pneumatic wall-locking geophone system},
author = {Kuhlman, Harland L and Cumerlato, Calvin L and Tweeton, Daryl R},
abstractNote = {A seismic signal receiving system is provided for use in boreholes to receive seismic waves in carrying out geophysical investigations. The system includes three pairs of opposed plates, each of the pairs of plates including oppositely facing outer surfaces for engagement with opposite sides of a borehole. A seismic receiver is mounted on the inner surface of each of the plates for receiving seismic signals. A double-acting, fluid-operated actuator selectively causes relative movement of the plates of the pairs of plates away from each other to provide expansion thereof so as to enable the plates to engage the walls of a borehole and selectively causes relative movement of the plates of the pairs of plates toward each other to provide retraction thereof so as to enable the system to be removed from a borehole. The pairs of plates each comprise a relatively long plate and a relatively short plate. An expandable linkage interconnects the long plates at the distal ends thereof. The plates are mechanically biassed into the retracted state so that the plates return to this state in the event of a system failure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

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