x-over sub

Cross Over Sub Crossover sub is mainly used in oil, gas and geology drilling process to connect with other drill stem parts. It is connected of upper drilling tools and lower drilling tools. It has well structure and well property. Because of the different connecting components, there are different requirements to crossover subs. Size: All size Please specify when ordering: Size, Connection. Cross-over subs are made from 4137H alloy steel.which are fully heat-treated to API