PLANT FOR IN-WELL SEPARATION OF OIL FROM WATER Russian patent published in 2014 - IPC E21B43/38 

FIELD: oil-and-gas industry.

SUBSTANCE: invention can be used for maintenance of seam pressure at water transfer between wells. Proposed plant comprises oil-well tubing with electric rotary pump and flushing check valve lowered in flow string, annulus above said pump for accumulation and reservation of separated oil, separation chamber arranged at well borehole bottom above said pump, flow channel communicating said annulus with said separation chamber, water inlets and outlets. Note here that said pump is equipped with outer sealing jacket to communicated pump inlet with intake device arranged in separation chamber and consisting of shank plugged at its bottom and separated into sections with inlets. Shank is equipped with barrel arranged level with every inlet to intake separated water in said intake device and trap oil drops. Note here that said inlets are arranged in row along said shank and feature diameter decreasing in every next section and upward. Said flow channel is composed by clearance between said jacket and flow string.

EFFECT: simplified design, higher reliability and quality of separation.

2 dwg