AUTOMATIC STANDPIPE PRESSURE CONTROL IN DRILLING

AUTOMATIC STANDPIPE PRESSURE CONTROL IN DRILLING A METHOD OF CONTROLLING STANDPIPE PRESSURE IN A DRILLING OPERATION CAN INCLUDE COMPARING A MEASURED STANDPIPE PRESSURE TO A DESIRED STANDPIPE PRESSURE, AND AUTOMATICALLY ADJUSTING A CHOKE IN RESPONSE TO THE COMPARING, THEREBY REDUCING A DIFFERENCE BET...

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Bibliographische Detailangaben
Hauptverfasser:	VARPE, FREDRIK, KNUDSEN, KJETIL ARNE
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Zusammenfassung:	AUTOMATIC STANDPIPE PRESSURE CONTROL IN DRILLING A METHOD OF CONTROLLING STANDPIPE PRESSURE IN A DRILLING OPERATION CAN INCLUDE COMPARING A MEASURED STANDPIPE PRESSURE TO A DESIRED STANDPIPE PRESSURE, AND AUTOMATICALLY ADJUSTING A CHOKE IN RESPONSE TO THE COMPARING, THEREBY REDUCING A DIFFERENCE BETWEEN THE MEASURED STANDPIPE PRESSURE AND THE DESIRED STANDPIPE PRESSURE. A STANDPIPE PRESSURE CONTROL SYSTEM FOR USE IN A DRILLING OPERATION CAN INCLUDE A CONTROLLER WHICH OUTPUTS AN ANNULUS PRESSURE SETPOINT BASED ON A COMPARISON OF A MEASURED STANDPIPE PRESSURE TO A DESIRED STANDPIPE PRESSURE, AND A CHOKE WHICH IS AUTOMATICALLY ADJUSTED IN RESPONSE TO THE ANNULUS PRESSURE SETPOINT. A WELL SYSTEM CAN INCLUDE A STANDPIPE LINE CONNECTED TO A DRILL STRING IN A WELLBORE, A SENSOR WHICH MEASURES PRESSURE IN THE STANDPIPE LINE, AND A CONTROLLER WHICH OUTPUTS AN ANNULUS PRESSURE SETPOINT BASED AT LEAST IN PART ON A DIFFERENCE BETWEEN THE MEASURED PRESSURE AND A DESIRED STANDPIPE PRESSURE. (FIG. 2)