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在水井钻探工作中,止水工作是井孔成井工艺的重要工序之一。一般来说,潜水、低承压区、小自流量区的井孔止水工作用常规方法即可奏效,但在地下水丰富的自流斜地及自流盆地的井孔止水,常规方法往往失效,止水效果也不理想。这些地区的特点是井孔涌水量大、压力高,一般止水工具下入困难,难以在止水段停留。鉴于这些情况,
In the drilling of water wells, sealing work is one of the important steps in wellbore well completion. In general, the wellbore sealing of submersibles, low pressure zones, and small free-flow areas can be effected by conventional methods. However, the conventional methods often fail in water wells where there is a large amount of free-flowing groundwater and self-flow basins. The water stop effect is also not ideal. The characteristics of these areas are the large amount of water in the well bores and the high pressure. It is difficult to enter the water stop tools and it is difficult to stop at the water stop section. Given these circumstances,