详述了IRDV智能测试阀的结构和工作原理，简述了其优点。

The paper amplifies the structure and working principle of IRDV and gives a brief introduction of its merits.

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但经过多次现场使用，证实全通径选择测试阀还存在某些不足，需要进一步完善和改进。

But by many times of field applications, some shortages for bore hole selective tester is tested which needs a good completion and dev...

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PCTH测试阀可实现持开的功能，环空泄压后仍能保持开启状态，使用起来更加方便、灵活。

PCTH tested valve has the function of being open state constantly and that keeping on open after annulus pressure relived out makes it much handy and be liable to be used.

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