Reasonable casing program is of key importance to the successful drilling of a wildcat.

合理的井身结构,对探井的钻探施工至关重要.

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Before simplified casing program, drilling cycle in Qingxi Oilfield is long and drilling cost is high.

青西地区在实施井身结构简化前,由于钻井技术上的难点等原因, 导致该地区钻井周期长、成本高.

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