• 1. Circulate bottoms up: 循环泥浆几周 | 循环一周 | 轮回泥浆水几周
• 2. CBU circulate bottoms up: 循环一周
• 3. circulate bottoms-up through the choke: 通过节流器循环井底到井口的泥浆行程

• 1.The first step of the process was to perforate, and after the guns were fired, to circulate bottoms up to handle any possible influx of gas.
  作业的第一步是射孔，射孔后循环一周以排除气体溢流的可能性。
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