Transvac Ejectors provide a proven, simple and reliable technology for boosting production of low pressure gas wells by lowering the well head pressure using existing energy sources as the motive HP gas such as:-

• HP gas energy normally wasted across a choke valve
• HP gas energy normally wasted across a compressor recycle valve
• Produced water

• No operating costs
• No maintenance costs
• No carbon footprint
• Relatively low project costs compared to compressors
• Low weight & compact size allows for production upgrades
• Patented Design
• Fast-track installation available for short-term well opportunities
• Minimal disruption to existing production operations
• Ideal solution for topside, subsea or FPSO installations

"the Gas Ejector gave us about a 15% increase in gas production, plus we didn't need to install the extra compressor - wow!"

Transvac Patented Production Boosting Ejector installed on North Sea Rig

See Application Sheet GJE010
See Application Sheet GJE011

Send us your requirements using our Transvac Gas Ejector Enquiry Form.

Visit our 'Production Boosting' micro-site at: www.ProductionBoosting.co.uk

Transvac Gas Ejectors can be used to increase the capacity of an existing mechanical compressor installation by changing the operating interstage pressure. The Ejector can be installed immediately upstream of the first stage to achieve a volume reduction, thereby increasing capacity. In some instances a mechanical compressor can be totally replaced by a Gas Ejector reducing energy costs and maintenance.

Send us your requirements using our Gas Ejector Enquiry Form

Visit our 'Production Boosting' micro-site at: www.ProductionBoosting.co.uk

The diagram below shows a typical arrangement for an Oil Ejectors application.

Send us your requirements using our Oil Ejector Enquiry Form

Visit our 'Production Boosting' micro-site at: www.ProductionBoosting.co.uk

If a suitable HP Well is available nearby, the pressure energy that is normally wasted across a choke could be used to drive an Ejector to reduce the head pressure of the LP Well, thereby bringing it back into production, even at times of high demand.

In the case of nearly and fully shut-in Wells, the increase in production rates can be significant since the P-Q curves are at their flattest in this region. (Small drop in pressure causes large increase in production).

 

The diagram shows the P-Q curve from a typical LP Well. The orange line represents the situation before the fitting of an Ejector (also called JET Compressor). Using energy from a suitable high pressure source (a choked HP Well for example) an Ejector can be used to lower the pressure at the Well head of the LP Well. If the pressure reduction achieved by the Ejector at the Well head is 'A' on the diagram, then the increased production from the LP Well will be represented by 'B'.

"The eductor is showing excellent performance to date, generating up to 0.9mln Nm3/d of "extra gas" from the shut-in wells. The Ejector will pay back for itself in less than a month"

630 barg rated Universal Design Ejector for Restarting Dead Gas Well

An added advantage is that by using an Ejector the total energy recovery from a LP Well can be increased by up to 25% additional revenue over the life of the well.

Visit our 'Production Boosting' micro-site at: www.ProductionBoosting.co.uk

Ejector technology can be used as a simple and effective method of keeping Wells and pipelines unloaded from condensate. By lowering the FHTP production from the Well is boosted, thereby increasing flow velocity and the reducing the tendency for condensate to collect. Ejectors can entrain multiphase flow without problems. If a slug of liquid is encountered the Ejector would momentarily pause before regaining normal operation.

See Application Sheet GJE011

Visit our 'Production Boosting' micro-site at: www.ProductionBoosting.co.uk

• Manufacture of internal components can be delayed until HP Well conditions are established. Manufacture of main pressure shell, not delayed.
• Delay between Well completion and installation minimised
• Internal components can be replaced to suit depleting Well conditions
• Specialist skills not required to install new internals

The patented "Universal" Design ejector comprises an external pressure retaining shell, into which can be fitted easily-replaceable internal working components (i.e. the nozzle and the diffuser). This approach allowes the design and manufacture of the pressure retaining shell to proceed, before the new HP Well conditions are known. This part takes the longest time to manufacture.

Once the new HP Well is completed and the actual conditions known, the internal nozzle and diffuser can then be designed and manufactured. Thus, the delay between Well completion and installation of the Ejector can be minimised.

An added advantage of this design is that the pressure retaining envelope can be sized to accommodate nozzle and diffuser designs for anticipated future operating conditions. Consequently, as the Well depletes over time, a new nozzle and diffuser can be fitted into the existing shell to match the new operating conditions and so maintain production at optimum level with the minimum downtime and cost.

Visit our 'Production Boosting' micro-site at: www.ProductionBoosting.co.uk