We streamline the oil and gas industry
With a compact gas compression and separation unit (CSU), we optimize oil and gas production by replacing traditional centrifugal compressors with a water-injection–based system.
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Introduction to the compact gas compression and separation unit (CSU)
How to combine the complex and costly gas-handling system used in oil and gas production into one compact unit?
The concept is based on compressing separated gas from the wellstream using a driving fluid (water or glycols). The main difference from a traditional separation system is the replacement of conventional centrifugal compressors with pumps, using liquid as the driving compression medium.
In 2018, a K-Spice Dynamic simulation model was built to verify functionality and design. This dynamic model makes it possible to prove the concept and create a base case including fluid properties, sizing, control philosophy, and energy budget. An updated patent application was filed in 2018, ref. P28738NO00.
Straen Energy AS was certified according to ISO 9001:2015 in March 2019.
Grant of the patent, EP 3883664 B1 “System and method for processing hydrocarbons” in 2023.
This new way of compressing gas may be used for any kind of gas, including hydrogen, and we have received an international preliminary report on patentability for Application No. PCT/NO2024/050195 “System and method for compression of gas” in 2025.
CSU System
CSU System
The cost-efficient and safe alternative for gas compression
Straen Energy tailors gas compression solutions to your needs.
Increased efficiency and flexibility
Eliminating compressors provides higher efficiency and flexibility in terms of pressure differential and throughput, without the need for recycling at low gas volumes.
Lower costs
Reduced equipment requirements, simplified sealing solutions, and less maintenance lead to significant savings in both CAPEX (up to 50%) and OPEX.
Increased safety and compact design
A compact design with fewer components reduces the risk of gas leaks and increases process safety, while also requiring less space and weight.
Explore Our System & Technology
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Compact CSU unit
Developed by Straen Energy, the system includes a new way of compressing gas by using a driving fluid to compress gas in vertical cylinders. An appropriate number of cylinders and pumps provides a continuous inlet and outlet flow of gas.
CSU System
CSU technology
The Compact Compression and Separation Unit (CSU)® is an innovative technology designed for efficient compression and separation of gases and liquids.
CSU Technology
Capture and injection
CSU enables safe and efficient compression of CO₂ for both storage and transport, and meet the strict environmental requirements, reduce CO₂ taxation and contributing to sustainable solutions.
CSU Process
Hydrogen gas compression
Groundbreaking solution for compressing large volumes of hydrogen to high pressures (>100 bar) with minimal energy use and without dynamic mechanical seals in gas handling.
CompressionExplore the remarkable benefits of CSU technology
The Compact Compression & Seperation Unit (CSU) unit provides a compact, lightweight platform that combines superior process safety standards with lower costs and reduced carbon footprint.
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