DEVICE FOR HIGH-PARAFFIN CRUDE OIL PRODUCTION Russian patent published in 2015 - IPC E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: device includes a flow string with a borehole pump and power cable fixed together with capillary tubing for delivery of chemical agent, which is made of armoured cable at outer surface of the flow string, a well-head tank for chemical agent and a dosing pump connected to the capillary tubing by pressure line, power cable introduced to the well through input unit made in tubing flange of wellhead equipment and connected to borehole pump control station. At the flow string there are protectors and from below the flow string is equipped with a stationary electric heater with controlled output, which is connected by extension cord to the power cable of borehole pump. The pressure line is introduced into the well through sealed side outlet of X-mass tree; at the wellhead the power cable is connected additionally to the heater control station. Upstream the pump the flow string is equipped with a bushing with radial port, to which the lower end of capillary tubing is connected.

EFFECT: increased reliability and operational efficiency, reduced specific quantity of metal, enhanced functional capabilities.

1 dwg