METHOD OF DUAL OIL PRODUCTION FROM LAYERS OF ONE WELL WITH SUBMERSIBLE PUMP SET (VERSIONS) Russian patent published in 2009 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to production of carbohydrates, and is intended for dual operation of at least two layers of single well equipped with submersible pump set and packer. Provides improvement of method efficiency. Substance of invention: according to one version, method includes lowering of packer installed between two layers in well concentrically to two columns of pipes - internal and external, as well as lowering of two artificial lifts. At that lower of them, for production of fluid from lower layer, is lowered on external column of pipes and is arranged as electro-submersible, comprising mainly pump with inlet module and submersible electric motor with power cable. According to invention, lower electro-submersible pump is selected with working parameters according to debit of lower layer. It is lowered in well below packer with cable lead and installed at the depth higher, lower or at the level of lower layer for fluid production from it along circular space created between two columns of pipes. Above electro-submersible pump, device of cross flow is installed, arranged with eccentric channels for lifting of lower layer fluid and cross channel with axial outlet for inflow of upper layer fluid. Upper artificial lift is selected with working parameters according to debit of upper layer. At that it is lowered separately into external column of pipes higher than the device of cross flow on internal column of pipes and is installed at the depth higher, lower or at the level of upper layer for fluid production from it along internal column of pipes. Upper artificial lift is equipped with either sealing jacket with cable lead or tailpiece, every of which has lower sealing hollow stem installed tightly in axial outlet of cross channel for separation of fluid flows of upper and lower layers. Electro-submersible pump and upper artificial lift are put into operation simultaneously or serially, or periodically for separate production of fluid from layers along different columns of pipes with the possibility of further account of their debits on the well surface. Other versions have differences depending on operation conditions and properties of produced carbohydrates.

EFFECT: improvement of method efficiency.

31 cl, 8 ex, 19 dwg