METHODS FOR USING A FORMATION TESTER

4 1 11@ FOR USING A FORMATION TESTER ABSTRACT 1001181 A METHOD OF TESTING A DOWNHOLE FORMATION USING A FORMATION TESTER ON A DRILL STRING. THE FORMATION TESTER IS DISPOSED DOWNHOLE ON A DRILL STRING AND A FORMATION TEST IS PERFORMED 5 BY FORMING A SEAL BETWEEN A FORMATION PROBE ASSEMBLY AND THE FORM...

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Hauptverfasser:	DAVID WELSHANS, SVETOZAR SIMEONOV, JAMES E. STONE, JAMES M. FOGAL, GREGORY N. GILBERT, LABAN M. MARSH, JEAN MICHEL BEIQUE, MALCOLM DOUGLAS MCGREGOR, MARK A. PROETT, GLENN C. GRAY
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:	4 1 11@ FOR USING A FORMATION TESTER ABSTRACT 1001181 A METHOD OF TESTING A DOWNHOLE FORMATION USING A FORMATION TESTER ON A DRILL STRING. THE FORMATION TESTER IS DISPOSED DOWNHOLE ON A DRILL STRING AND A FORMATION TEST IS PERFORMED 5 BY FORMING A SEAL BETWEEN A FORMATION PROBE ASSEMBLY AND THE FORMATION. A DRAWDOWN PISTON THEN CREATES A VOLUME WITHIN A CYLINDER TO DRAW FORMATION FLUID INTO THE VOLUME THROUGH THE PROBE ASSEMBLY. THE PRESSURE OF THE FLUID WITHIN THE CYLINDER IS MONITORED. THE FORMATION TEST PROCEDURE MAY THEN BE ADJUSTED. THE TEST PROCEDURE MAY BE ADJUSTED TO ACCOUNT FOR THE BUBBLE POINT PRESSURE OF THE FLUID BEING MONITORED. THE PRESSURE MAY MONITORED TO VERIFY A PROPER 10 SEAT IS FORMED OR IS BEING MAINTAINED. THE TEST PROCEDURE MAY ALSO BE PERFORTNED BY MAINTAINING A SUBSTANTIALLY CONSTANT DRAWDOWN RATE USING A HYDRAULIC THRESHOLD OR A VARIABLE RESTRICTOR.