正文 长宁国之卷：第四十六节 油田建设（四）(第3页/共4页)
突发事件，督促工程开展。这次钻井和前面的勘探性钻探不一样，要使用到15厘米直径的套筒。设备要求和人员要求都要高的多。
机械厂还做不出这么大直径的耐压无缝管，所以套筒参考了旧时空延长油田的经验。当时延长油田的矿务部门没有套管，使用的是缴获的日本大口径火炮的身管。机械厂如法炮制，按照火炮身管的制造工艺，先用熟铁铸造出身管，经过锤锻之后进行中心钻孔，制造出“炮筒”来。
第二天一早，各钻井组进入作业面，同时指挥部通知木材厂和机械维修站也进入24小时待班状态。指挥部搬到了主通道旁搭建的工棚内。这次作业将七个钻井分别为一到七号井。当天下午3点，钻探正式开始。由于蒸汽机只有四台，两台用来驱动钻机，两台用来驱动泥浆泵，所以同时开工的只有一号井和二号井。
秦西科组织了一个巡逻应急小组，在各个作业点里面巡视，将任何不顺利的钻探情况及时上报指挥部。
钻探开始的时候一切正常，各处进展顺利，但是到了第二天上午，有钻探工来报告：二号井遇到了紧急情况。
“什么？压力太大？钻不动。你说清楚一点。”一个应急小组成员跑来给秦西科报告。
然而工人的汇报模糊不清，秦西科听了一下，觉得情况有些紧急，便派人去把崔云红也找来。几个人一起到了二号钻井平台上。
原来钻井钻探到四十米时进入了气层。有着巨大压力的天然气在钻杆里顶着泥浆柱往上涌，整个作业面成了泥塘。泥浆泵不能停止所以也不能加接钻杆。整整两个小时，钻井不但没有往前钻1厘米，反而由于涌出的泥浆导致钻头后退了半米多。
“上回压阀！”秦西科立即要求在钻头前加上回压阀，“赶紧的！不然就白干了！”
机械工业口原本并没有生产过这种设备，但是作为常见的油井设备，秦西科专门和展无涯沟通，专门组织生产了一部分。这东西主要结构就是两个圆片，大圆片中间开一个5厘米圆孔，小圆片的直径大于大圆片的孔。两个圆片用铰链组合起来，安在最下面一个钻杆接头上。泥浆从上而下流向井底时，小圆片向下打开通道；停泵时，小圆片盖住大圆片的孔，井底的泥浆不至于被井底压力顶着上涌。由于采用了回压阀，二号钻井平台顺利地钻穿了气层。在以后的六个小时里钻进了九米。
出现天然气层证明他们距离油层已经很近了－－这是个一个令人振奋的信号。
钻探开始后第三天，二号钻井平台已经突破了一百米的计划钻探深度。陈鹏宇在凌晨5点钟到钻井平台来巡察的时候，发觉泥浆泵运转得轻松了，转盘转动也变得灵活起来，他知道很快就会有令人满意的结果了。
果然，到了上午九点，钻井工报告：泥浆槽里开始
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