TREA

by negative mud pulses using a pressure relieve valve between drill pipe and annulus

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Industry

  • CPC
  • E21B47/185
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21BEARTH DRILLING E21B47/00Survey of boreholes or wells

Current Industry

E21B47/185by negative mud pulses using a pressure relieve valve between drill pipe and annulus
Industries