circulating sub

Features & Benefits
A circulating sub falls under the downhole 
accessory tool category that regulates flow rates, 
especially drilling in slimhole wells or wellbore 
cleanout projects. Circulating sub is 
manufactured to the following specs 
connections, lengths, weights and material grade.
Crossover Circulating Sub/Swages are 
manufactured from AISI 4140/4145. They 
typically are female hammer union on the top