downhole

Occurring in the drilled bore of an oil well either underground or undersea.

Japanese Meaning

油井の掘削孔内、特に地下または海中の油井で見られる現象を指す

The new downhole sensor transmitted pressure readings in real time to the surface.

新しい掘削孔内のセンサーは圧力測定値をリアルタイムで地上に送信した。

Sense（1）

Occurring in the drilled bore of an oil well either underground or undersea.