简体中文
Русский
Hydraulically operated Circulation Sub offers the operator two different functions. When drilling with a mud motor, a ball may be dropped in order to shift the Circulation Sub into the open position, which in turn uses the drop ball to shut off the flow to the mud motor, forcing the circulation flow out the four [...]
Used to eliminate flow-back from the wellbore, the Dual Flapper Check Valve’s spring loaded valves provide maximum flow area while also ensuring high performance sealing capabilities. Risk of failure is virtually eliminated through the dual sealing arrangement. The Dual Flapper Check Valve is a standard coiled tubing string component and is frequently run with drilling [...]