针对目前采油过程中防止井漏和井喷措施存在的问题 ,研制了一种自动保护油层井底开关。这种井底开关主要由弹簧支持的浮动阀心和上下两阀座构成 ,可以在井漏或偶发性井喷时 ,通过阀心上下压差的作用自动关闭油层 ,又可以在正常生产中自动打开油层 ,从而保证生产油层不受井喷或井漏的损害。使用时 ,将其与封隔器和其他所需工艺管柱联接 ,安装到油层射孔段以上 ,就可保证正常生产。现场试验表明 ,这种开关性能指标符合设计要求 ,使用情况正常 In view of the current problems in the production process of preventing oil well leakage and blowout measures, an automatic protection oil bottom hole switch has been developed. The bottom hole switch is mainly composed of a spring supported floating valve core and two upper and lower valve seats, which can automatically shut down the oil layer by the pressure difference between the upper and lower sides of the valve when the blowout or accidental blowout occurs, and can also be automatically opened during normal production So as to ensure that the production reservoir is not damaged by blowouts or lost circulation. When used, it is connected with the packer and other required process columns and installed above the perforation section of the oil layer to ensure normal production. Field tests show that this switch performance indicators meet the design requirements, the use of normal