DCP MIDSTREAM

Incident Narrative

ON JANUARY 11 AT APPROXIMATELY 5:20 PM MST AT THE DCP WATTENBERG CHERRY HILLS - MEWBOURN NGL METER SKID FILTER, THE INLET PSV-200 LIFTED AT APPROXIMATELY 970 PSIG, BELOW ITS SET PRESSURE OF 1440 PSIG, ALLOWING NGL TO FLOW TO THE FACILITY FLARE FOR APPROXIMATELY 40 MINUTES. THE PIPELINE WAS IN STEADY-STATE OPERATION AT APPROXIMATELY 970 PSIG FLOWING APPROXIMATELY 900 BARRELS PER HOUR AT THE TIME OF THE PSV LIFT. NO PRODUCT WAS RELEASED TO GROUND OR ATMOSPHERE, ALL FLOW FROM THE PSV WENT TO THE FLARE. THE NGL PIPELINE CONTROLLER RECEIVED A SCADA ALARM AT 5:20 PM MST FOR FLOW TO FLARE AND DISPATCHED FIELD RESOURCES TO INVESTIGATE. FIELD PERSONNEL ARRIVED ON SITE AND BLOCKED IN PSV-200 AT 5:56 PM MST ENDING THE RELEASE TO FLARE. ENGINEERING CALCULATED APPROXIMATELY 128 BBLS OF NGL WAS FLARED DURING THIS TIME. PRIOR TO THIS RELEASE, PSV-200 WAS TESTED ON 1/7/2020 AND FOUND TO BE FUNCTIONING AT THE INTENDED SET POINT OF 1440 PSIG. FOLLOWING THE RELEASE, PSV-200 WAS RE-TESTED 3 TIMES ON 1/13/2020, FOUND TO BE FUNCTIONING AT THE INTENDED SET POINT OF 1440 PSIG AND WAS PLACED BACK INTO OPERATION. DEBRIS INTRODUCED FROM NITROGEN INJECTION DURING TEST ON 1/7/2020 CAUSED THE VALVE TO OPEN PREMATURELY. FACILITY OPERATING PROCEDURES WERE AMENDED TO INCLUDE FLUSHING VALVE TUBING TEST PORT PRIOR TO TESTING VALVE.