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。
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。
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