gasless delay detonator
4.Combined with the structural features of YB1-1 type pressure detonator and field practice and experience. Through the analysis of different structures and features of several perforating strings,this paper simply discusses the further application of per forating technologies such as YB1-1 type detonator matching with MFE test valve,application together with a mechanical firing head, joint operation with a time delay detonator,joint operation with a Baker negative pressure valve and joint operation with a downhole pumping uint.


