Anhui Oilfield summarized that problems existed in pure slurry cementing before 1994 were too much water filtration,poor displacement capability,counterflow of cement slurry in the annulus,and etc.
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- 安徽油田总结1994年前水泥净浆固井存在的问题有水泥浆析水量大,驱替钻井液效果不佳,环空水泥浆倒流等。