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REDA Continuum
Unconventional extended-life ESP
APPLICATIONS
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Casing 5.5 in or larger
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Gassy production environments
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Abrasive production environments
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Reservoirs with uncertain productivity
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Wells with steep production decline
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Unconventional shale reservoirs
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Conventional oil wells
BENEFITS
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■■
■■
■■
■■
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Improves ESP system reliability
Increases uptime and extends system
run life
Improves cash flow through accelerated
production and continuous operation
Reduces operating cost through superior
hydraulic efficiency
Enhances performance in gassy and
abrasive applications
Lowers total cost of ownership
FEATURES
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Enhanced compression design
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Factory-shimmed construction
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Abrasion-resistant bearing configuration
for ultimate shaft support and stability
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Wide operating range
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Bowed vane for superior performance
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REDA Gard* submersible pump stage
design that helps to minimize abrasive
stage wear (for the Continuum 4000)
The REDA Continuum* unconventional extended-life ESP, a component
of REDA* electric submersible pump systems, is a mixed-flow stage
pump engineered for unconventional flow behavior and challenging
environments. Featuring enhanced compression design and wide opening
vanes, the Continuum ESP improves recovery and reliability in gassy
and abrasive applications. With the ability to operate at high efficiency
through a wide operating range, the Continuum ESP eliminates the need
for costly replacements due to production changes, reducing overall
operation expenses and optimizing uptime.
Superior performance and reliability in unconventional plays
Developed using computational fluid dynamics to model stage geometry
and architecture, the Continuum ESP is engineered to deliver higher lift,
superior efficiency, and reduced power consumption. Its design further
improves upon the field-proven high reliability of REDA compression
pump designs.
The Continuum ESP was extensively tested using state-of-the-art tools
and proprietary techniques to model operation at different production
rates and fluid conditions, including at low-flow-rate and abrasive
conditions. These solutions were validated with an instrumented string
test and X-ray visibility in a flow loop test and an accelerated erosion
loop test.
The optimized geometry, architecture, and material selection of the
Continuum ESP allows for a wider operating range, which improves
pump performance at low rates, in transient flow, and in abrasive
environments. Its enhanced compression design enables Continuum
ESPs to operate even at flow rates below the lower limit of the catalogrecommended operating range. The minimum flow rate of the Continuum
ESP’s operating range is determined by system constraints, including
protector thrust bearing, motor cooling, shaft brake horsepower limit, and
system efficiency.
Enhanced stability and strength
The Continuum ESP offers various radial shaft-support options for a
variety of well conditions. The abrasion-resistant configurations feature
bearings with bushings and sleeves made out of zirconia, tungsten
carbide, or silicon carbide, evenly spaced throughout the pump. The
ceramic bushings are mounted within diffusers on two supporting Aflas®
O-rings, using the REDA systems’ patented bearing technology. These
features allow the bushing to better align to the shaft and minimize
vibrations, reducing the risk of damage.
For applications with high production of abrasive materials, the full
bearing housing keyless sleeve configuration is recommended, with one
bushing and sleeve per stage made of either tungsten carbide or silicon
carbide. The keyless sleeve design enables uniform stress distribution,
which greatly reduces the possibility of cracking under load or from
shock impact.
REDA Continuum
REDA Continuum ESP Specifications
Continuum 1000
OD, in [mm]
4.00 [101.6]
Stage geometry
Mixed flow
Recommended operating range, bbl/d at 60 Hz (m3/d at 50 Hz) 200–1,350 [26–179]
Efficiency at best efficiency point (BEP), %
68.41
Head per stage at BEP, ft at 60 Hz (m at 50 Hz)
27.66
Burst pressure, psi [kPa]
5,000 [34,474]
6,000 [41,368] (optional)
Ni-Resist®,
5530 alloy
Carbon steel, Redalloy* high-nickel alloy
0.68 [12.27]
154 (High-Strength MONEL®), 240 (INCONEL® 718)
ARZ-ZZ, ARZ-TT, ARZ-SS,
FBH-TT-KS, FBH-SS-KS†
ARZ zirconia, tungsten carbide, silicon carbide
Enhanced compression design, factory-shimmed
Stage metallurgy
Housing metallurgy
Shaft diameter, in [mm]
Shaft material and rating at 60 Hz, hp
Shaft radial support options
Radial bearing material
Pump construction
Continuum 4000
4.00 [101.6]
Mixed flow
3,500–7,000 [556–1,113]
75.17
32.82
6,000 [41,368]
Ni-Resist,
5530 alloy
Carbon steel, Redalloy alloy
0.87 [22.23]
316 (High-Strength MONEL), 492 (INCONEL 718)
ARZ-ZZ, ARZ-TT, ARZ-SS,
FBH-TT-KS
ARZ zirconia, tungsten carbide, silicon carbide
Enhanced compression design, factory-shimmed
†ARZ* abrasion-resistant zirconia bearing, zicronia bushing and sleeve; ARZ abrasion-resistant zirconia bearing, tungsten carbide bushing and sleeve; ARZ abrasion-resistant zirconia bearing, silicon carbide bushing and sleeve; full
bearing housing, tungsten carbide bushing and keyless sleeve; full bearing housing, silicon carbide bushing and keyless sleeve
ft
BEP
Flow = 984
Head = 27.66
Power = 0.29
Efficiency = 68.41
30
hp
Eff
3.00 60%
25
2.50 50%
20
2.00 40%
15
1.50 30%
10
1.00 20%
5
0.50 10%
0
250
500
750
1,000
1,250
1,500 1,600
Capacity (bbl/d)
ft
BEP
Flow = 4,310
Head = 32.82
Power = 1.39
Efficiency = 75.17
35
hp
Eff
7.00 70%
30
6.00 60%
25
5.00 50%
20
4.00 40%
15
3.00 30%
10
2.00 20%
5
1.00 10%
2,000
3,000
4,000
5,000
6,000
Capacity (bbl/d)
REDA Continuum ESP 1000 (top) and 4000 (bottom) pump curves.
*Mark of Schlumberger
Other company, product, and service names
are the properties of their respective owners.
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