METHOD AND SYSTEM FOR FLOWABLE PRODUCT PRODUCTION FROM WELL BY SIMULTANEOUS PRODUCT SEPARATION AND CHEMICAL INJECTION IN WELL Russian patent published in 2006 - IPC E21B43/38 E21B43/22 E21B37/00 

FIELD: hydrocarbon and water production from wells, particularly arrangements for separating materials produced by the well, especially for well having production zone located above injection one or for well having production zone located under injection one.

SUBSTANCE: method involves separating flowable product into hydrocarbon flow and water flow; simultaneously injecting chemical in preselected well zone. System comprises downhole separation device for product separation and chemical injection device. Separation device includes separation means to divide product flow into oil and water ones, injection pump to supply flowable product to separation means and pump to extract hydrocarbon flow to day surface. Chemical may be injected in well production zone and transported by water flow to treat both well zones with chemical. Chemical may be injected directly into injection well zone.

EFFECT: possibility of simultaneous chemical injection and product separation in oil or gas well, reduced costs, decreased sediment forming and increased well productivity.

13 cl, 6 dwg