Compression & Solutions
SMCP-250 Arctic wellhead compressor unit
Arctic resistance (–55°C) · Highest availability (≥ 98 %) · Zero CO2 emission · Energy efficient
As a gas well’s pressure declines, the gas velocity is ­often
not enough to transport liquids upward through the
tubing to the surface. A liquid column starts to build up,
and eventually kills the well. This is commonly ­referred
to as “liquid loading.”
By compressing the gas near the wellhead, you can
­significantly reduce the flowing wellhead pressure. This
immediately increases your production rate and prevents
liquid loading. Consequently, using a wellhead compressor
can substantially extend the service life of a well.
Designed for harsh arctic conditions
Modern technologies are used to test internal heat distribution
at minus 55 degrees outside temperature.
Depending on reservoir characteristics, a gas well with an
additional depletion compressor can continue to produce
commercial gas for up to 10 years. With that additional
life span in mind, Siemens developed a mobile wellhead
compressor solution that can be reused at a second or
even third production site. To make installation, removal,
transportation, and reinstallation as easy as possible, we
integrated all functions into a single skid-mounted assembly
that provides easy access to all required interfaces.
High availability from –55°C to +40°C
Field redevelopment in harsh, remote, and even hostile
locations requires a high degree of customization. Both
equipment and staff may be subjected to severe climate
conditions. A remote controlled solution reduces the need
for frequent on-site work of your personnel at these sites.
To address these challenges, Siemens designed a mobile
field development solution in an isolated container that
can be installed wherever required. The unit includes a
fully remote-controlled oil-injected screw compressor with
an electric motor drive. The mobile wellhead compressor
can operate in severe ambient temperatures b
­ etween
–55°C and +40°C. With an output of 450 kW and a capacity
of up to 100,000 normal cubic meters per day, this solution can extend the production life of a well that would
otherwise die.
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The unit can also be equipped with an optional XL highefficiency inlet separator that includes a slug catcher and
an inlet cooler. A high efficient inlet separator and oil
conditioning equipment prevent oil degradation. These
systems prohibit oil viscosity drop, accumulation of salts,
water contamination, and the buildup of aggressive
substances.
Proven technology for tough conditions
In collaboration with a major Russian gas producer,
­Siemens has developed a compression solution suitable
for reliable operation in extremely low ambient temperatures. It features a superior temperature resistance and
houses the compressor and controls in two separately
conditioned rooms. It also includes an indirect closed
cooling system. O
­ ther features include made-to-measure
heating, air-conditioning and v­ entilation systems, perfectly
adapted to the unit’s heat development while in operation.
Customized solutions based on a proven concept
Because compressor oil degradation is the most reported
cause of failure in unconditioned gas applications, Siemens
offers customized solutions to prevent frequent oil change
and severe rotor bearing damage. These include:
■■ Highly efficient inlet separators
■■ Two-stage inlet separator systems
■■ Slug catchers
■■ Inlet gas coolers
■■ Special oil type selection
■■ Alternative oil temperatures
■■ Dedicated bypass oil conditioning systems
■■ Independent bearing oil system
In addition, our oil-flooded screw compression solutions
consist of standard class A components and equipment,
and include automation and remote monitoring to allow
for unmanned operation. The compressor’s high efficient
oil-separator helps ensure low oil carry-over.
Specifications for Siemens Mobile Wellhead Compressor Unit SMCP-250 arctic*
Rated power
450 kW
Capacity (inlet 2 bar (a))
100,000 nm3/d
Inlet pressure
≥ 1 bar (a)
Discharge pressure
≤ 12 bar (a)
Ambient temperature
–55°C to +40°C
Compressor type
Oil-injected screw compressor
Driver type
Electrical
Capacity control
Slide valve / Variable speed (option)
Cooling
Air-cooled closed cooling water system
Control and operation
Local panel on skid / Telecontrol (option)
Applied standards
ASME, API 619, 97 / 23 / EC Pressure Equipment Directive, GOST-R, R
­ ostekhnadzor
Single lift unit
Yes
Dimensions compressor unit (l x w x h)
12.0 x 2.6 x 3.0 m
Dimensions cooling unit (l x w x h)
7.2 x 2.8 x 2.8 m
Weight compressor unit
35 tons
Weight cooling unit
7 tons
* Units are designed for road transport. Specifications may vary per specific design.
The Siemens Wellhead Compressor Family
Discharge
pressure bar (a)
SMCP-250: 25-100
SMCP-300: 40-200
20
SMCP-500: 60-300
15
10
5
Flow
(1000 nm3/d)
50
100
150
200
250
300
Siemens Netherlands
Prinses Beatrixlaan 800
2595 BN Den Haag
For more information contact our Centre of Competence
for Field Redevelopment:
Siemens Netherlands
Energy, Oil & Gas, Compression and Solutions
E-mail:oilgas.nl@siemens.com.
Phone: +31 703 333 333
Oil & Gas Division
Order No. E50001-G440-A181-X-4A00 | Printed in Germany |
Dispo 21618 | c4bs No. 7807 |
TH 104-120506 | BR | 000000 | DB | 06122.0
© 06.2012, Siemens AG
www.siemens.com/oil-gas