Because the limit of special casing program of sidetracking well and horizontal well, the fishing success ratio of conventional little junk fisher is low.
由于侧钻井、水平井特殊井身结构限制，常规的小件落物打捞器打捞成功率低。
A common type of junk mill with a flat bottom used in fishing operations.
在打捞作业中所使用的平底的普通类型金属屑磨铣工具。
A common type of junk mill with a flat bottom used in fishing operations.
在打捞作业中所使用的平底的普通类型金属屑磨铣工具。
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