Characteristics of cross-jointflush valve: they are time-lapse, self-closing, beeline of water route.
四通冲洗阀特点：延时自闭、水流路径成“一”字型， 适应的水压比较多， 有手柄式、按钮式、脚踏式。
2
Ease of Application - Excessively wide tolerances tend to break capillary force; and, as a result the alloy will either fail to flow throughout the joint or may flush out of the joint.
应用简易-公差过大可能会破坏毛细作用，结果是合金无法流遍连接部位，或者从连接部位冲刷出去。
3
Floating displacement cementing technology and flushjoint casing technology are the first application in sidetracking well of Dagang Oilfield.