Top Drive, Ibop, Whashpipe manufacturer / supplier in China, offering API Qy Full Hydraulic Double-Action Drilling Jar with Heavy Shocking for Well Drilling and Fishing 89-203mm, API Qy89-203 Full Hydraulic Drilling Jar with Comprehensive Test Report for Downhole Operation, Reliable API Qy Full Hydraulic Drilling Jar, Size 89-203mm Max Tensile 3000 kN and so on.