Meaning crown block
What does crown block mean? Here you find 2 meanings of the word crown block. You can also add a definition of crown block yourself
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crown blockThe fixed set of pulleys (called sheaves) located at the top of the derrick or mast, over which the drilling line is threaded. The companion blocks to these pulleys are the traveling blocks. By using [..]
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crown blockthe fixed system of pulleys fitted at the top of a derrick for use in raising and lowering the drill string, casing, etc.
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