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出典:Wikipedia
出典:『Wikipedia』 (2011/02/03 22:04 UTC 版)
In the oil industry measured depth (commonly shortened to MD), is the length of the borehole, line (b) in the image, and is measured in feet or metres. The borehole in this image is deviated from the vertical but many oilwells are still just conventional vertical wells (straight holes).
Measured depth