![In Drilling and word over operation, Roschen type releasing spear is a tool mainly used for fishing of drill pipe, oil pipe and casing from fish hole. It can be used with In Drilling and word over operation, Roschen type releasing spear is a tool mainly used for fishing of drill pipe, oil pipe and casing from fish hole. It can be used with](http://img.bj.wezhan.cn/content/sitefiles/2065293/images/13350310_ReleasingSpear-4.jpeg)
In Drilling and word over operation, Roschen type releasing spear is a tool mainly used for fishing of drill pipe, oil pipe and casing from fish hole. It can be used with
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China API Fishing Tools Releasing and Circulating Overshot Socket - China Fishing Tool, Releasing and Circulating Overshot
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