METHOD OF WASHING SAND BRIDGE UNDER CONDITIONS OF WELL SERVICING

oil and gas producing industry; applicable in well servicing with use of coltubing plant with integral joint long pipes. SUBSTANCE: method includes mounting of coltubing plant; installation of blowout preventer and pumping equipment; preparation of washing foaming fluid; well washing in zone of sand...

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Bibliographische Detailangaben
Hauptverfasser:	ANANENKOV A.G, CHUGUNOV L.S, DMITRUK V.V, GLUKHEN'KIJ A.G, GOLUBKIN V.K, PIVEN' O.A, ERMILOV O.M, LAPERDIN A.N, KONONOV V.I, VASIL'EV V.I
Format:	Patent
Sprache:	eng ; rus
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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Beschreibung
Zusammenfassung:	oil and gas producing industry; applicable in well servicing with use of coltubing plant with integral joint long pipes. SUBSTANCE: method includes mounting of coltubing plant; installation of blowout preventer and pumping equipment; preparation of washing foaming fluid; well washing in zone of sand bridge. Washing foaming fluid is prepared in two stages. First, service water in amount of 70-75 vol.% is mixed with monobasic alcohol in amount of 25-30 vol.%. Then, added to obtained solution is water-soluble neonol in amount of 1.0-1.5%. In washing operation, first, jet nozzle is delivered at speed of 0.1 m/s down to 9-10 m ahead of bridge. Then speed of delivery is reduced to 0.001 m/s and foaming fluid is supplied to integral joint long pipe string. Further feed of jet nozzle for sand bridge washing is carried out with force of 300-500 kg until preset interval is reached. EFFECT: increased efficiency in well servicing and reduced cost of work. 3 cl