除按照机械和液压分类以外，震击器还可以分为钻井用震击器和打捞用震击器。
In addition to the mechanical and hydraulic versions, jars are classified as drilling jars or fishing jars.
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.
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