Jacket ball valves shall be able to work norm ally under all field conditions specified in the technical specifications.

夹套球阀应能在本技术规格书规定的所有现场条件下正常运行。

Consequently to find out their merit and shortage, and provide the reference for applying the system reliability theory in the field of shallow ocean jacket platforms.

从而找出两种方法各自的优点、缺点，为系统可靠性理论在海洋石油平台系统可靠性分析方面的应用提供了参考依据。

This paper briefly outlines the major features of the jacket and topside structure in Pinghu oil and gas field development.

概括了平湖油气田开发工程中使用的导管架和平台上部结构的特点。

This paper gives a brief introduction of the WHP structural design of Wenchang oil field , and discusses how the jacket type is selected.

介绍文昌油田基本设计项目井口平台结构设计过程，论述导管架方案的确定，以及在基本设计中需要注意的问题。

Secondly, two dimensional conductive model of cooling jacket was set up and numerical simulation was carried out using one dimensional results. Temperature field in cooling jacket was computed.

其次建立了推力室的冷却套二维导热模型，使用数值模拟的方法和一维计算的结果，得到了冷却套的温度场。