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It can couple with two plugs simultaneously, and makes the drilling fluid fill into casing in turn and quickly. This can simplify the cementing operation, prevent cement pollution.
可同时装两个胶塞，既可用于常规双塞固井，又可用于连续式双级注水泥作业。
It can couple with two plugs simultaneously, and makes the drilling fluid fill into casing in turn and quickly. This can simplify the cementing operation, prevent cement pollution.
可同时装两个胶塞，既可用于常规双塞固井，又可用于连续式双级注水泥作业。
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