Title:
HOLE SIZE VARIATION MEASURING DEVICE
Document Type and Number:
Japanese Patent JP2005256532
Kind Code:
A
Abstract:
To provide a hole size variation measuring device which can measure hole size variation at an optional location of a bore hole, in order to measure fluctuation of a bedrock.
The hole size variation measuring device is formed of a hole size variation measuring instrument for measuring hole size variation, and a flexible rod connected to the hole size variation measuring instrument. The flexible rod is not substantially deformed in its axial direction.
Inventors:
YAMAUCHI TSUNEO
SHIMIZU SHIGEJIROU
SHIMIZU SHIGEJIROU
Application Number:
JP2004072315A
Publication Date:
September 22, 2005
Filing Date:
March 15, 2004
Export Citation:
Assignee:
YAMAUCHI TSUNEO
MACOME CORP
MACOME CORP
International Classes:
E21B47/08; G01B21/14; (IPC1-7): E21B47/08; G01B21/14
Domestic Patent References:
| JPH04182594A | 1992-06-30 | |||
| JP2003014444A | 2003-01-15 | |||
| JPS63165699A | 1988-07-08 | |||
| JPH04237793A | 1992-08-26 | |||
| JP2002116265A | 2002-04-19 | |||
| JPH09304126A | 1997-11-28 | |||
| JPH05321567A | 1993-12-07 | |||
| JPS58123995A | 1983-07-23 |
Attorney, Agent or Firm:
Tomimasa Konishi
Tomoko Nakamura
Mikiharu Hagino
Tomoko Nakamura
Mikiharu Hagino
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