Oil drilling tool circulating sub With Hammer union Thread

Product Description The Circulating Sub is connected betweenwellhead pipe stringand ground circulating system. When casing is running or completed, the circulating sub can be connectedto provide fluid circulation. According to the application, circulating sub is connectedbetween Kelly and casing orbetween casing and a hose. Features The circulating sub during running casing isequipped with casingpin thread on one end and DP thread, DP box thread or union thread onthe other.