For the block gas reservoir of bottom water drive,the forecasting problem of production rate about semi-spherical flow are usually happened when the production of gas well in gas reservoir and the construction of underground gas storage.

Finite element analysis on drawing process of FVS0812 aluminum alloy semi-spheroid;

An improved compound die was developed for the forming of a type of semisphere hard metal alloy article,in which bidirectional and floating die assembly were applied instead of conventional single action compression structure.