Agh

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