DOWNHOLE PNEUMATICALLY DRIVEN PUMP ASSEMBLY Russian patent published in 2016 - IPC F04F1/08 

FIELD: oil and gas industry.

SUBSTANCE: device contains the accumulation chamber (AC) formed by two electromagnetic valves (EMV), by two mechanical valves (MV), by two level sensors (LS) and by the electronic control unit (ECU). The Accumulation Chamber Operation Control Unit (ACOCU) is placed on the day surface and comprised by the electric cabinet (EC), two pumps, the receiver (R). The first output of EC is connected to ECU, and its second and third outputs are connected to pumps. ACOCU input is connected with one of EMV by the pipeline through the well space, free from the accumulation chamber, through the pipeline section connected to EMV. Two intermediate receivers (IR) fitted with own LSs are added to ACOCU. ACOCU pumps are two hydraulic pumps (HP) are used, the input of each of which is connected to the bottom of the respective IR. The output of the first HP of the first IR is connected to the second IR, and the output of the second HP of the second IR - to the first IR. Each IR is fitted with the inlet valve (IV) and the outlet valve (OV) installed above IR and connected to them. IVs are connected among themselves and connected to the pipeline upstream ACOCU. IVs are connected among themselves and connected by the pipeline upstream to the named R.

EFFECT: device allows to increase productivity and reliability, to provide possibility of production of oil with high viscosity and with raised content of mechanical impurity.

1 dwg