摘要：桦南城西勘探区在钻探施工过程中易出现孔壁坍塌、缩径现象而且岩粉颗粒大、含量高，给施工带来很大困难，通过使用石油钻井助剂FT-99及其它助剂配制的优质泥浆，有效地提高了钻进效率，避免了孔内事故，达到一次成孔的目的。
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