【摘要】 介绍一种适用于煤矿井下钻孔直径为56～65 mm的小孔径水压致裂封隔器的结构、设计要点和试验结果。止水元件选用钢丝膨胀胶管,承压能力高、使用寿命长。用无缝钢管代替钻杆供水,并采用U形销式快换接头联接,劳动强度低、效率高,密封性好。试验结果表明:封隔器不仅止水效果好,而且重量轻,操作简单。该封隔器适用于在任意方向的钻孔中进行浅孔水压致裂试验。更多还原

【Abstract】 The structure,design features and test results of a hydraulic fracturing packer used in small holes of 56~65 mm in diameter suited to the mine were intruduced.Expansion rubber hose with steel wire is selected and used in sealing element,because of its ability of high-pressure and long service life.Instead of drill rods,seamless steel tubes are adopted in water supply with low labor strength,high efficiency,good sealing.The seamless steel tubes are joined by quick adapters with U pin.Tests results showed that the packer has advantages of good sealing effect,the light weight and simple operation.The packer is applied to hydraulic fracturing test of shallow borehole in all direction.更多还原