贵州织金区块煤层气单井控压产气阶段排采制度研究

煤层气单井排采控压产气阶段的关键问题是如何合理制订排采制度。以贵州省织金试验区煤层气开发排采资料为依托,分析了织金煤层气藏特征,探讨了产气量、产水量、套压、液面深、井底流压等排采动态参数间的规律,提出了井底流压稳定值的计算方法,并研究了井底流压的控制,最后给出了适合该区块排采制度的建议。

Design of a Special PLC for Garbage Truck

A special PLC is designed for the control system of garbage truck,based on the feature and applications of vehicular electrical device.The purpose is developing a kind of mature products to control the hydraulic system.The general design plans are described,in detail,and the design points are analyzed and summarized.