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башмак с обратным клапаном (

a short, heavy, cylindrical steel section with a rounded bottom that is attached to the bottom of the casing string. It contains a check valve and functions similarly to the float collar but also serves as a guide shoe for the casing.

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Penulis

  • enchantress
  • (Ukraine)

  •  (V.I.P) 16689 poin
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