FIELD: oil and gas industry.
SUBSTANCE: during implementation of the method the following is performed: well is separated above perforation interval of productive formation by packer; space under packer is connected to wellhead by pipe string; space of pipe string above packer is separated by spring-loaded valve; space of pipe string above spring-loaded valve is connected to intertube space of well; pipe string above place of connection with intertube space is separated from valve by plunger; fluid is extracted from space of pipe string above plunger with valve and from intertube space until current pressure in well is reached; pressure in pipe string from wellhead is increased; spring-loaded valve is opened and space under packer is connected to intertube space.
EFFECT: improving the cleaning quality.
1 dwg
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Authors
Dates
2012-05-20—Published
2011-05-27—Filed