Hydraulic Jar,DST tools

Hydraulic Jar Features & Benefits: Hydraulic Jar is also called Big John Jar, is included as part of a tool string to help remove stuck tools. The jar helps free a stuck tool or tool string by resisting a pull on the work string. When the work string is stretched by the pull, tension in the jar is released and an upward impact is delivered to the stuck tool. KINGWELL Hydraulic Jar Technical Data: Specifications 3 7/8″ 5″ Outside Diameter 99 127.5 Drift Diameter 38 57 Total