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Crown block and water table

An assembly of sheaves or pulleys mounted on beams at the top of the derrick. The drilling line is run over the sheaves down to the hoisting drum.

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  • ส่วนหนึ่งของคำพูด: noun
  • อุตสาหกรรม/ขอบเขต: Oil & gas
  • Category: Drilling
  • Company: PETEX

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  • Harry8L
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