Drill Stem Subs

Packard International manufacture varieties of drill stem subs. Our drill stem subs are made of high grade steel (4145 modified) and are capable of performing in harsh condition. They can be custom manufactured to a client’s specification. Some of the drill stem subs that we provide are:

• Lift Subs - Allow lifting out the drill string
• Impression Blocks - Used for down hole fishing
• Pump-in Subs - Allow heavier/lighter mud to be pumped into the drill string
• Swivel Subs - Double-pin subs that connect the swivel to the kelly valve
• Crossover Subs - Allow change from one thread type to another
• Kelly Saver Subs - Save threads on the Kelly Valve