JPS57110914A - Method and apparatus for measuring wall of hole - Google Patents

Method and apparatus for measuring wall of hole

Info

Publication number
JPS57110914A
JPS57110914A JP55185044A JP18504480A JPS57110914A JP S57110914 A JPS57110914 A JP S57110914A JP 55185044 A JP55185044 A JP 55185044A JP 18504480 A JP18504480 A JP 18504480A JP S57110914 A JPS57110914 A JP S57110914A
Authority
JP
Japan
Prior art keywords
interval
hole
walls
angle
guiding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP55185044A
Other languages
Japanese (ja)
Other versions
JPS6336442B2 (en
Inventor
Masatake Maeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ohbayashi Gumi Ltd
Obayashi Gumi Ltd
Original Assignee
Ohbayashi Gumi Ltd
Obayashi Gumi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ohbayashi Gumi Ltd, Obayashi Gumi Ltd filed Critical Ohbayashi Gumi Ltd
Priority to JP55185044A priority Critical patent/JPS57110914A/en
Publication of JPS57110914A publication Critical patent/JPS57110914A/en
Publication of JPS6336442B2 publication Critical patent/JPS6336442B2/ja
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/08—Measuring diameters or related dimensions at the borehole

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

PURPOSE:To measure the interval between walls of a hole by compensating the deviation of guiding cables from a vertical line by multiplying a remotely measured value with a compensation constant which is proportional to the angle of inclination of the guiding cables. CONSTITUTION:In measuring the interval between walls of a hole 2 drilled in the ground, an apparent interval which is normally larger than its true interval in the horizontal direction, l0 is remotely measured by the swing of guiding rods 3, 4 in the hole. However, simultaneously with the remote measurement of such an apparent interval between walls, the angle of slant of the guiding rods 3, 4 is measured by angle meters 3a, 4a respectively and a true interval between walls, l0, wherein the deviation of the guiding rods 3, 4 from a vertical line has been compensated by multiplying the apparent interval with a compensation constant proportional to the measured angle of inclination of the rods can be obtained.
JP55185044A 1980-12-27 1980-12-27 Method and apparatus for measuring wall of hole Granted JPS57110914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55185044A JPS57110914A (en) 1980-12-27 1980-12-27 Method and apparatus for measuring wall of hole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55185044A JPS57110914A (en) 1980-12-27 1980-12-27 Method and apparatus for measuring wall of hole

Publications (2)

Publication Number Publication Date
JPS57110914A true JPS57110914A (en) 1982-07-10
JPS6336442B2 JPS6336442B2 (en) 1988-07-20

Family

ID=16163806

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55185044A Granted JPS57110914A (en) 1980-12-27 1980-12-27 Method and apparatus for measuring wall of hole

Country Status (1)

Country Link
JP (1) JPS57110914A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5415218A (en) * 1977-07-04 1979-02-05 Hitachi Ltd Device for winding cord of motor operated vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5415218A (en) * 1977-07-04 1979-02-05 Hitachi Ltd Device for winding cord of motor operated vehicle

Also Published As

Publication number Publication date
JPS6336442B2 (en) 1988-07-20

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