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部分油井因地层亏空,油井漏失严重,冲砂时液体不能返出,使施工不能正常进行,砂子不仅冲不出来,而且由于地层亏空,冲砂液进入地层造成油层污染,针对此情况我们选择了一种捞砂泵捞砂工艺。利用地面作业机提供动力,通过连接装置带动捞砂泵柱塞上下往复运动,产生负压抽吸液流把积砂带入储砂油管,从而将井内积砂捞出。本文从该捞砂泵结构、工作原理、注意事项等方面入手,分析了捞砂泵的的适用性,为油井清砂提供了一套新的工艺方法。
Some wells due to the formation of an empty, serious loss of oil wells, sand flushing liquid can not be returned, so that the construction can not be normal, the sand not only washed out, but also because of the formation of airspace, red sand into the formation of reservoirs caused by pollution, in view of this situation we have chosen A karst sand pump fishing process. The utility model uses the ground work machine to provide power and drives the plunger of the sand-feeding pump to reciprocate upwards and downwards through a connecting device to generate negative pressure suction flow and bring the sand into the sand storage tubing so as to remove the sand in the well. This paper starts with the structure, working principle and precautions of the sanding sand pump, analyzes the applicability of the sanding sand pump, and provides a new set of technological methods for oil well sanding.