震击器主要有两类：液压震击器和机械震击器。

There are two primary types, hydraulic and mechanical jars.

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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.

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针对钻井过程中常见的井下卡钻事故，研制了新型全液压式随钻震击器。

In light of the commonly seen downhole breakdown of drilling pipe sticking in the drilling process, the new-type fully hydraulic while-drilling bumper sub was developed.

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