FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to oil-and-gas industry and can be used in oil production to reduce well drowning and make well service life longer. Proposed device comprises pipe string. Said pipe string is perforated in its lower part when used in horizontal or inclined-directional well. Pipe string inside accommodates tubing column wherein submerged pump is mounted. Note here that tubing column perforation hole area per column unit side surface, first, decreases along its length and, then increases. In pump location zone, there can be no perforation at all.
EFFECT: reduced drowning, longer life of wells, increased yield, lower costs.
5 cl, 9 dwg
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