A PROPOSAL TO TRANSPORT FLUIDS FROM WELLHEAD TO FLOW STATION USING A GAS DISPLACEMENT PUMP. Juan Carlos Brown, 6th July 2017

THE PROBLEM: A well producing in Natural Flow (NF) or Gas Lift (GL) can not produce due to a high Top Head Pressure (THP). The THP increase limits well production and eventually could avoid its flow WELL THP To Flow Station Flow Line Optional MERLA GAS LIFT

THE PROBLEM: A well producing in Natural Flow (NF) or Gas Lift (GL) can not produce due to a high Top Head Pressure (THP). An usual option consist to install a Multiphase Pump, but this is associated with a high CAPEX and OPEX and also security issues. likewise a high GOR can limit the pump's application. POZO THP Multiphase Pump To Flow Station Flow Line Optional MERLA GAS LIFT

THE PROBLEM: A well producing in Natural Flow (NF) or Gas Lift (GL) can not produce due to a high Top Head Pressure (THP). In some cases is possible to install a Gas Separator, Tanks, Pumps and Personal, it have associated EXPENSES too. Gas Measurement PCV To Gas Gathering System WELL PSV GAS INLET OIL-GAS SEPARATOR STORAGE TANK LCV LIQUID PUMP To Flow Station Flow Line MERLA GAS LIFT High Pressure Gas SEE V1. V2 AND V3 IN THE NEXT SHEET

Gas Displacement Pump (GDP) THE PROBLEM: A well producing in Natural Flow (NF) or Gas Lift (GL) can not produce due to a high Top Head Pressure (THP). It could be possible in some cases transport de oil crude via truck instead of pumping. Gas Measurement PCV To Gas Gathering System WELL PSV GAS INLET INCREASE THE COST OIL-GAS SEPARATOR STORAGE TANK LCV To Flow Station Gas Displacement Pump (GDP) MERLA GAS LIFT High Pressure Gas SEE V1. V2 AND V3 IN THE NEXT SHEET

PROPPOSAL Next is shown the Description of the Gas Displacement Pump (GDP), a proposal to transport the well's fluids from the head to the flow station without a mechanical pump or trucks, using instead an available source of high pressure near the well´s location (Usually the same of the gas lift system).

Gas Displacement Pump (GDP) INTEGRATED PACKAGE: OIL AND GAS SEPARATOR COMBINED WITH AN GAS DISPLACEMENT PUMP. (IN GAS LIFT WELLS) Gas Measurement PCV To Gas Gathering System WELL PSV GAS V1 INLET OIL-GAS SEPARATOR V3 GAS LCV Operational Flexibility LIQUID V2 Gas Displacement Pump (GDP) To Flow Station Flow Line GDP Feed MERLA High Pressure Gas GAS LIFT SEE V1. V2 AND V3 IN THE NEXT SHEET

HOW WORKS THE GAS DISPLACEMENT PUMP TO GAS GATHERING SYSTEM 1200 psig HIGH PRESSURE GAS (IN THIS CASE 1200 PSIG) V3 V1 OPEN TO ALLOW THE LIQUID DISPLACEMENT CLOSE TO MOVE OUT ONLY THE LIQUID THE PRESSURE REACHED INSIDE THE VESSEL IS ENOUGH TO BRING THE FLUIDS UNTIL THE FLOW STATION ( IN THIS CASE 300 PSIG) 300 psig 5 psig CLOSE AFTER DEPRESSURIZE THE VESSEL OPEN TO DEPRESSURIZE THE VESSEL FILL OF THE VESSEL LIQUID FROM THE SEPARATOR 60 psig V2 280 psig OPEN TO DISPATCH THE LIQUIDS TO THE FLOW LINE CLOSE TO PERMIT THE VESSEL´S FILL SEE V1. V2 AND V3 IN THE PREVIOUS SHEET

Gas Displacement Pump (GDP) INTEGRATED PACKAGE: OIL AND GAS SEPARATOR COMBINED WITH AN GAS DISPLACEMENT PUMP. (IN WELLS WITHOUT ARTIFICIAL LIFT) Gas Measurement PCV To Gas Gathering System WELL PSV GAS V1 INLET OIL-GAS SEPARATOR V3 GAS LCV Operational Flexibility LIQUID V2 Gas Displacement Pump (GDP) To Flow Station Flow Line GDP Feed High Pressure Gas SEE V1. V2 AND V3 IN THE PREVIOUS SHEET

ADVANTAGES OF THE GDP Less expensive than a Pump (Single phase or Multiphase) Due to It don't have mobile parts, it almost don't need maintenance. It don't consume electricity only small quantities of high pressure gas which will be recompressed. The device is easy and cheap to make using recovered material. The performance of the GDP is analogous to a positive displacement pump. If you need more pumping capacity, the system automatically increase the number of strokes by a time period.

GDP ISSUES You need a reliable source of high pressure gas (Usually 1200 psig) In a biphasic current a previous liquid gas separation is recommendable. You will not consume electricity but you have to consider the compression cost in your economical evaluation. Usually the larger the pumping capacity the container size increases.

DEVICES USED IN OIL AND GAS INDUSTRY, USING THE SAME PRINCIPLES

BLOWCASE (DEVICE MADE IN 80’S) THE DEVICE WAS USED FOR PUMPING CONDENSATE FROM A GAS COMPRESSION PLANT TO CRUDE OIL STORAGE TANKS (APPROXIMATELY 2000 METERS AHEAD), USING 1200 PSIG NATURAL GAS

THE LIQUID WAS PUMPED IN FEW MINUTES, USING 1200 PSIG NATURAL GAS BILGE PUMP DEVICE INSTALLED IN 2007, IT WAS USED TO PUMP OIL AND WATER FROM A RECOLECTION CELLAR TO A TANK INSIDE THE SAME LOCATION, ITS CAPACITY IS 350 BARRELS PER DAY. FULL AFTER BEFORE EMPTY THE LIQUID WAS PUMPED IN FEW MINUTES, USING 1200 PSIG NATURAL GAS

GAS DISPLACEMENT PUMP (GDP) INSTALLED IN 2010 IT WAS USED TO PUMP LIGHT CRUDE (30° API) FROM 600 TO 900 PSIG IN ORDER TO MIXER WITH A GAS LIFT CURRENT BEFORE THE INJECTION TO THE OIL WELL, USING 1200 PSIG NATURAL GAS. LIQUID RATE 100-200 BPD.

FUNCIONAMIENTO GAS CHAMBER PUMP THE SAME PRINCIPLES CAN BE USED FOR ARTIFICIAL LIFT THE DEVICE IS KNOWN AS: GAS CHAMBER PUMP FUNCIONAMIENTO GAS CHAMBER PUMP Valve Electronic Controller OIL WELL VALVE 1 To Flow Station Bottom Hole Sensor Surface Display CLOSE OPEN Flow Line CLOSE OPEN INJECTION GAS INJECTION TUBING 1.315” VALVE 2 CLAMPS 3- 1/2”x 1,315” 3 1/2” TUBING 7” X 3 Y 1/2” PACKER OPTIONAL OIL ACCUMULATION CHAMBER Bottom Hole Pressure Sensor Standing Valve Liner Hanger RESERVOIR

A PROPOSAL TO TRANSPORT FLUIDS FROM WELLHEAD TO FLOW STATION USING A GAS DISPLACEMENT PUMP. Juan Carlos Brown, 6th July 2017