JPS57110914A - Method and apparatus for measuring wall of hole - Google Patents
Method and apparatus for measuring wall of holeInfo
- 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
Links
- 238000005259 measurement Methods 0.000 abstract 1
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.
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)
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 |
-
1980
- 1980-12-27 JP JP55185044A patent/JPS57110914A/en active Granted
Patent Citations (1)
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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