Safe, sustainable gas processing at a fraction of the cost
Twister delivers reliable, high-yield separation solutions that are changing the natural gas processing landscape and providing a commercially viable, safer and more sustainable alternative to traditional separation systems. Twister technologies cover Dehydration, Hydrocarbon Dewpointing and Natural Gas Liquids (NGL) recovery - all from the same unit.
Twister SwirlValveTMImproving JT operations
The Twister SwirlValve improves the separation of two-phase flow across a pressure reduction valve such as a choke valve, JT valve or control valve. Economic benefits include more flow throughput, increased gas handling capacity, a rise in natural gas production, and the reduction in bottlenecks found in existing overloaded separators.
Applications used in:
Offshore Gas Dehydration & Dewpointing
Offshore Light Oil/Condensate Stripping with Gas Reinjection
Offshore Sour Gas Dehydration
Onshore Gas Dehydration & Dewpointing
Offshore (Sweet) Gas Dehydration
- Increased gas handling capacity
- Increased NGL production (C6+)
- Lower export gas dew points
- Easy to retro-fit in existing piping arrangement
- Debottlenecks existing overloaded separators by creating droplets in the valve
- Less liquid carry-over/gas carry under
How it works
Using the free pressure drop available in JT operation, the SwirlValve creates a rotating flow increasing droplet size and hence improving the separation efficiency of downstream separation equipment.
Similar to standard cage type control valves with pressure balanced piston, the SwirlValve design results in a compact valve with a small actuator.
Based on a standard cage flow control valve, SwirlValve builds on a well proven concept.
Ideal for brownfield applications, replacing a JT valve with a SwirlValve debottlenecks downstream separator trains. Alternatively a reduced pressure drop in JT-LTS processes can be applied while maintaining dewpoint specifications.
The SwirlValve inlet where the wet gas mixture enters.
A pressure balanced piston on the inside of the cage regulates the flow requiring low actuation forces, resulting in the use of small actuators, high reliability and long maintenance intervals.
The main feature of the SwirlValve is the tangentially oriented holes or slots in the cage, creates a swirling flow downstream of the cage. The strong swirl is maintained over the entire flow range and creates both larger droplets through coalescence, as well as separation of liquids to the wall. Both effects greatly enhance the separation efficiency of downstream equipment. This results in smaller downstream separation equipment; less carry-over, less foaming; less upsets of the hydrocarbon dewpoint and reduced loss of glycol in case of dehydration by MEG or DEG.
SwirlValve Outlet with increased droplet size compared to regular control valves enhancing the separation performance of downstream equipment. The SwirlValve can debottleneck plants by increasing the flow rate for same dew point at the same pressure drop or by reducing pressure drop for the same dew point at the same flow rate
Offshore Dehydration: Shell (SSB) B-11, Malaysia
The goal was to provide a safe gas processing solution with minimal environmental impact, while providing a significant reduction in capital and operational expenditure. 12 Twister units and 2 Hydrate Separators were provided with Twister and Shell Sarawak agreeing on a three-year Process Operation & Availability Guarantee (POAG). The risks associated with TEG sour gas dehydration (20% CO2 & 3500 ppmv H2S), economics and flow assurance made the operator decide to select the Twister Dehydration…
With its chemical free solutions, configured to each customer site and backed up by its position as the leading authority on fluid dynamics and separation, Twister offers an inherently reliable, low maintenance and high yield alternative to chemical-based technologies at significantly reduced costs.