underbalanced

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. Describing a method of drilling for petroleum in which the pressure in the wellbore is kept lower than that of the formation being drilled, thus allowing fluid to enter the well as soon as it is found. not-comparable

词源

Etymology tree
Proto-Indo-European *h₁én
Proto-Indo-European *h₁entér
Proto-Indo-European *(H)n̥dʰí
Proto-Indo-European *-ér
Proto-Indo-European *(H)n̥dʰér
Proto-Germanic *under
Proto-West Germanic *undar
Old English under-
Middle English under-
English under-
English balanced
English underbalanced
From under- + balanced.
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