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（修改收到期2017-02-18）
【编辑朱伟】
大位移井水平段长距离套管开窗新工艺
美国Abrado油井服务公司推出大位移油气井的水平段长距离套管开富新工艺（Medusa)，主要解决油田永久弃井或油气藏分隔难题。原有的大位移井的套管开窗工艺，由于受到开窗工具直径的限制，开窗过程机具不稳定，易造成各种并底复杂情况甚至引发事故。而Medusa开富工艺则利用开窗工具“自稳定技术，进行大位移井水平段的长距离铣削作业。作业范国包括多层常规或偏心套管的并简，且可以做到不损坏并眼的外层套管。 Medusa开窗工艺的另一个特点是可以不考虑多层
万方数据
水泥封图套管的水泥环长度，而进行较长距离的套管开窗作业，从而保障油气藏储层的封闭性。当前Medusa开工艺的作业范国，最小套管直径为 177.8mm，最大套管直径为473.075mm；通井或扩孔套管直径可达762mm。最大的大位移井水平段开窗长度已达73.15m，偏心角超过60°。特别典型的是，最近某井使用原有套管开窗工艺只能弃井，但使用Medusa开窗工艺成功设置了水泥塞，保证了上面地层的油气藏储层的正常开采
(郭永峰编译E-mail:guoyf2@cosl.com.cn）