Device and method for testing self-suction pressure of coal bed gas underground screw pump

The invention provides a device and method for testing the self-suction pressure of a coal bed gas underground screw pump, and relates to the technical field of oil and gas production engineering, and the device comprises a test workbench, an underground screw pump, a water inlet pipeline and a driv...

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Bibliographische Detailangaben
Hauptverfasser:	SHAO SIHUA, SU LEI, SUN ZHIQIN, QUAN JIYE, HAN JIAYE, SU CE, ZHOU XIAOGANG, WANG BO, HE AIGUO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CALCULATING COMPUTING COUNTING DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELECTRIC DIGITAL DATA PROCESSING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	The invention provides a device and method for testing the self-suction pressure of a coal bed gas underground screw pump, and relates to the technical field of oil and gas production engineering, and the device comprises a test workbench, an underground screw pump, a water inlet pipeline and a driving device. Through a large number of field tests and experience summaries, the problems are solved that in the prior art, due to the fact that the self-suction pressure of an underground screw pump cannot be accurately mastered, reasonable matching of the distance between a liquid inlet of a drainage and production pipe column and a liquid suction opening of the underground screw pump cannot be achieved, and gas mixing of a coal bed gas single well is caused. According to the invention, the distance values of different types of underground screw pumps are accurately controlled on site, the suction force of negative self-suction pressure formed during operation of the underground screw pumps to shaft coal bed gas i