Underhole drilling technology solved the difficulties of drilling in wet layers, deepened the drilling under water, and found an effective method of drilling hi pouring crushing layer.

潜孔锤泡沫钻进技术彻底攻克了潜孔锤在潮湿地层钻进的难关，加深了潜孔锤水下钻进的深度，找到了一条在涌水破碎地层进行潜孔锤钻进的有效途径。

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The 3D reservoir description is developed, it deepened the reservoir understanding, the drilling success ratio 60% increases to 82.5%.

开展三维油藏描述，加深对油层的认识，使钻井成功率由60％提高到82．5％；

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