Multiformation production & injection

Dual pumping and bottom-hole agent injection equipment is used upon exploitation of oilfields with such complications as high viscosity and ARWD when bottom-hole formation zone treatment is necessary. Equipment set includes specialized sucker rod pump with hollow rod for agent injection below the pump. Application of flush valve allows, if necessary, valves washing of differential pump and well killing. Overheated steam can be used as an agent for bottom-hole formation treatment (in this case all the equipment should be heat-resistant).