With the development of the gas field production, the gas producing pipe stings are often plugged in the high-pressure production stage of gas well. 气井采气管柱堵塞在气藏开发中经常发生,特别是在气井高压生产阶段。
A study of the design feature of e~ 3 counter-rotating turbine(ⅰ)& consideration on the design of high-pressure stage E~3对转涡轮设计特点分析(Ⅰ)&高压涡轮基元级方案分析
And a low loading coefficient is more favorite for high-pressure rotor in the counter-rotating elementary stage designing process. 对转涡轮高压级基元设计应尽量选择较大载荷系数等观点和建议。
Some zircons pre-served the inherited cores, while most zircons were formed at the high-pressure granulite-facies metamorphic stage. 其中少量锆石具有继承性锆石的核,而多数锆石则形成于高压麻粒岩相变质阶段。
Applications of the high-pressure water cutting also belong to the primary stage in China. 国内的高压水切割应用还属于处级阶段。