Our approach
Core applications
Product Range
Data Driven
Environmental performance

The most refined solids management technology in the world

The only dual cyclone desander on the market with a 2x2 meter footprint. With a fit-for-purpose, modular design, DualFlow strategically developed to create a flexible, stackable and compact solution that fits in easily on crowded platform environments.

Technical Specification 5K DualFlow Desander
Dualflow 3D
Dualflow 3D


Height: 3 280mm
Width: 2 000mm
Depth: 2 000mm
Weight: 8 500kg
Pressure Vessel:
Duplex Duplex S31803
Valves: Duplex S31803 and AISI 316
/ AISI 316
Pipes: Duplex S31803 and AISI 410
Frame: Carbon steel (S355)
DNV RP A203 - Qualified separation efficiency
PED 97/23/EC CE
Norsok Z-015, ZONE II
DNV 2.7-3 Portable Offshore Units
ASME B16.34
Maximum flow rate (fluid):
3 168m³
Maximum flow rate (gas):
565 000 Sm³/day
Maximum sand rate:
200 kg/hrs
Particle size for 99.8% efficiency:
20 micron

* depends on the application
Min. operating temp:
-28 ºC
Max. operating temp:
+120 ºC
Preview 20210923 Fourphase 065 01 Workshop O 833311

Next generation cyclone technology

The DualFlow contains two patented, single liner cyclones in one unit. As one vessel is isolated and flushed, production continues through the other. 560 sensors return real time data on flow rate, pressure, temperature, weight, and asset integrity. Delivering a proven separation efficiency of 99.8%, and a dynamic range of 20 microns to 10mm solids up to 20 000 bbl/day and 20 MMscfd. The result is continuous production and better asset management, as the data allows early stages of erosion to be managed.
Working as a closed loop
FourPhase deliver hands-fee solids management to improve HSE offshore. By combining automated desanders and flushing with closed tanks, the system, any hazardous bi-products such as NORM, H2S or Benzene can be produced to the surface without exposure to offshore operators.

Maintain optimal flow rates

Proven to optimise production, DualFlow uses its real time data to tune well flow. By maintaining optimal flow rates, production is maintained at a consistent level, avoiding drops in production from choking back the well. This maximises solids free production, lowering the cost per barrel and enhancing production performance.

Improving production
Fourphase 158 05 Operations Room
Fourphase 158 05 Operations Room

The first automated solids management system

Capable of automated, remote operations, the system delivers solids-free production flow while reducing operational costs and eliminating risks related to human error. Connected to the system’s real time data, the DualFlow is aided by a control system which can perform advanced prediction simulations in real time.

Digital integration
Fourphase 236 06 Confernces
Fourphase 236 06 Confernces

Actively improves ESG reporting

With 560 sensors integrated into every DualFlow, the key is in the data that is captured in real time. This knowledge enhances decision making and reduces the need for carbon heavy interventions.

Environmental performance
Fourphase Nature 20200501 033
Fourphase Nature 20200501 033
Fourphase Desander Sand Management System North Sea
Case Studies
January 16 2023
30% hydrocarbon production increase on a sand-producing gas well
Continuous production worth $2.0M/month was enabled using a DualFlow desander. The well produced 140Mscf/month of gas.

Read More
Fourphase Desander Offshore Filter Solution
Case Studies
January 13 2023
Efficient surface sand removal adds $2.6M monthly production
Achieve continuous flow from the well by managing sand production via inline de-sanding.

Read More
Fourphase In The Us On Truck
Case Studies
May 26 2021
Returning the shut-in “devil’s well” to production
How we retuned the shut-in “devil’s well” to 6 000 bbl/day, creating $30M USD additional profit

Read More
Fourphase 080 02 Test Room
Insights Articles
March 31 2023
The key features of a smart desander
How does a automated desander work, and how does different cyclonic desanders compare? Read this article to learn more.

Read More
Fourphase Nature 20121128 007
DualFlow improves the production of underperforming wells and enables operators to optimise asset integrity and increase field economics.

Improving Production
Fourphase 045 01 Workshop
Fourphase 045 01 Workshop

Market differentiating technology

Compact 2m x 2m (6.6 ft) footprint
Separation efficiency of 99,8% and solid particle range from 20μm – 10mm
Highly automated system with remote operation
Real time solids measurement and data gathering
An interlock system to control all valves
Intuitive design with two vessels that can be run separately, in series and parallel
Single liner technology
560 inbuilt sensors
Fourphase 030 01 Workshop
Fourphase 030 01 Workshop

Benefits to your project

Fits easily on crowded platform environments
Enables retrofit without modification to offshore platforms
Reduces jetting of solids to sea
Reduces POB and mundane tasks on-site
Eliminates risk of operator error
Facilitates quick, confident decision making that cuts down associated risk
Reduces the need for carbon heavy interventions
Improves HSE
Enables continuous production
Facilitates a wide flow range
Ensures safe remote operations
Handles a variety of applications, including CT interventions, online desanding and production