agh
DESCRIPTION
persentationTRANSCRIPT
Slide 1
The Advanced Gas Handler (AGH)
The primary aim of the Advanced Gas Handling system is to avoid "gas-locking" in the pump which can result in inefficient cyclical operations and possible premature mechanical failure if not properly controlled.
The AGH does not separate gas - but conditions it by compressing the total fluid; so it can be produced by the pump.
Slide 2
Electric Submergible Pumps are
limited in the amount of vapor
that can be produced with the
liquid, denoted as the Vapor to
Liquid ration (VLR). The Advanced
Gas Handler significantly
increases the allowable VLR.
REDA pumps equipped with an
Advanced Gas Handler can now
produce reservoirs with high
levels of free gas traditionally
lifted by gas lift or jet pumps.
The REDA Advanced Gas
Handler can make a well more
economical by increasing the
drawdown and increasing the
amount of oil produced. This
increases recoverable reserves
and extends the economic life of
the field.
Slide 3
The Advanced Gas Handler (AGH)
The AGH improves the overall efficiency of many submersible lift systems in comparison to those employing gas separators only.
In many cases, the AGH will allow successful production of wells that previously could not be economically, or reliably produced with submersible pumps employing only gas separators, due to gas problems.
Slide 4
AGH Performance
The Reda AGH (Advanced Gas Handler) will not only eliminate bothersome U/L trips but will actually let you produce rates never thought possible in high GOR / low pressure wells.
0
500
1,000
1,500
2,000
Befo
re A
GH
Wit
h A
GH
Well in Europe gains incremental production of 439 b/d with the AGH
Barr
els
per
Day Week
-4
500
1,000
1,500
2,000
2,500
Week-2
Week0
Week2
Week4
Week6
AG
H I
nsta
lled
Barr
els
per
Day
Total Production
Net Oil Increased by
270 bpd
AGH Field Trial increases net oil by 270 b/d average and allows total production to nearly double in Indonesian well.The AGH Improved the Production Revenue Stream by nearly $5,000/day
Slide 5
100
200
300
400
With Rotary Separator Only
Average 1U/L
Shutdownper day
100
200
300
400
With AGH and Separator
Smooth ChartNo Shutdowns
The AGH results in stable operation with reduced restarts due to underload shutdown (i.e. gas lock). This improves production and enhances reliability.
REDA AGH Performance
Slide 6
The Advanced Gas Handler (AGH)
The AGH is designed to improve the overall lift efficiency of a submersible lift installation by maintaining a higher gas to liquid ratio in the tubing string.
The higher GLR will in act to reduce the hydraulic horsepower required to lift an oil well producing oil, water and gas.
Slide 7
Controlled Testing of REDA AGH In Field Fluids With Maintained Stable Operation**
% Free Gas byvolume intoAGH
62
48
AGH SERIES
400 540
** No ceiling has been established on either series
Slide 8
Advanced Gas Handling Objectives
Increase pumps ability to produce gassy wells without "gas locking".
Utilize gas to improve overall lift efficiency.
Slide 9
Research-1991
Lab Testing-1993
Prototype-1993-1994
ESP Workshop Paper- 1995
ESP Workshop Paper- 1998
REDA AGH History
Slide 10
Advanced Gas Handling Lab Tests
Flow, bpd
Standard DN1300
Lif
t, f
eet
0% Vapor4%
Vapor
0
5
10
15
20
25
30
0 500
1000
1500
2000
2500
0
5
10
15
20
25
30
0 500
1000
1500
2000
2500
Slide 11
Advanced Gas Handling Lab Tests
DN1300 With Advanced Gas Handling System
Flow, bpd
Lif
t, f
eet
0% Vapour11% Vapour
Maximum
0
5
10
15
20
25
30
0 500
1000
1500
2000
2500
Slide 12
Standard Impeller
Gas Accumulation
Slide 13
Traditional flow through an impeller
Turbulent flow in the pump breaks the gas up into fine
bubbles at the impeller entrance.
During flow through the impeller the gas bubbles tend to lag
behind the liquid in the lower pressure area of the impeller.
Centrifugal force flings the higher density liquid towards the circumference – the lower density gas accumulates below it in the impeller eye.
As the gas increases the liquid production decreases.
Slide 14
AGH Impeller
Gas AccumulationEliminated with AGH Feature
Slide 15
Flow through an AGH impeller
Mixing (or crushing) the gas bubbles is necessary to aid flow.
The key issue is to reduce the impact of the centrifugal force which promotes the gas separation.
Balance holes exist in all impellers. In AGH’s an additional passage allows re-circulation of the fluid.
This allows separated gases to be re-mixed with the liquid which increases the pumps gas volume recovery ability.
Slide 16
AGH Impeller
Gas AccumulationEliminated with AGH Feature
Gas Accumulation
Standard Impeller
Slide 17
Principle
Homogenize the mixture
Reduce bubble size
Put gas back into solution
Help gas to move to main stream
Increase gas handling ability with minimal head loss
Methods:
Principles
Slide 18
Application of AGH
In general, an AGH should be considered if the following conditions exist at the intake of the pump:Free Gas Percentage = 20 to 30% by volume (or greater) Intake VLR = 0.25 bbl/bbl (or greater)
Model OutsideDiameter,
inches
ShaftDiameter,
inches
ShaftArea,
sq inch
ShaftHP
Limit
HPRequired
MinimumEffective
Flow Rate
MaximumEffectiveFlow Rate
DN 5-21 4.00 0.6875 0.371 200 13 500 2100
GN 20-40 5.125 1.000 0.785 600 37.5 2000 4000
GN 40-80 5.125 1.000 0.785 600 45 4000 8000
SN 70-100 5.375 1.000 0.785 600 53 7000 10000
ADVANCED GAS HANDLER DATA
Slide 19
Application of AGH
The AGH can be used with a standard intake or with a gas separator.The choice will depend on how much free gas will be present at the intake for producing conditions; and on whether there is a packer preventing gas production up the annulus.
Pump
AGH
StandardIntake
Pump
AGHGasSeparator
Slide 20
Application of AGH
The AGH is available in 400, 540, 538, and 562 (as of Feb 2002) series in the following configurations:
ES FL-CT, ES CR-CT,
ARZ FL-CT, ARZ CR-CT.
Slide 21
Expand applications that can be produced with an ESP
Replace gas-lift De-water gas wells Produce gassy well below a packer
Increase production in wells experiencing downtime due
to gas-locking Continuous stable operation Benefit of gas lift effect in the tubing
Increase production in wells that have been limited to
high intake pressures to keep stable operation Continuous stable operation at lower intake
pressures - higher production rate possible
Benefits of REDA AGH