One control station should be located at least 50 feet from the center line of the wellbore. ... stack, while the main hydraulic fluid is supplied through a hose or rigid line to the pod and accumulators on the blowout preventer stack. ... A device is available to operate the kelly cock hydraulically from the rig floor in two to four seconds. 6.A.2 Lower Kelly Valve. ... 6.A.10 Manual Drilling Fluid Weighing Devices.A drilling fluid balance designed to weigh a compressed sample of drilling fluid cananbsp;...
|Title||:||API Recommended Practice|
|Author||:||American Petroleum Institute. Production Dept|