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

2. 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

3. 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

4. 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

5. 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

6. 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).

7. 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

8. 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

9. 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

10. 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.

11. 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.

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

13. 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

14. 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

15. 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 BPD.

16. 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

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