FIELD: oil producing industry. SUBSTANCE: well design includes vertical and horizontal sections of cased wellbore and tubing located in it. Outlet of vertical wellbore is located under producing formation at depth ensuring formation of oil lock. Tubings with pump are lowered to lower point of casing. It is perforated at the level of formation roof to provide for control of pressure in gas space. Level gage is installed in internal cavity of casing string. EFFECT: higher efficiency. 1 dwg
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Authors
Dates
1997-06-27—Published
1993-01-14—Filed