49
The Application of Ejector Technology to Subsea Fields of the Future David Hoon, Technical Director. Subsea 2013 - 6th February 2013
The Application of Ejector Technology to Subsea Fields of the Future
David Hoon, Technical Director.
Subsea 2013 - 6th February 2013
What are Ejectors?HOW EJECTORS WORK
Low Pressure
HighPressure
Intermediate Pressure
Ejectors use high pressure fluid to compress a low pressure fluid to an intermediate pressure
What are Ejectors?HOW EJECTORS WORK
Low Pressure
HighPressure
Intermediate Pressure
Ejectors use high pressure fluid to compress a low pressure fluid to an intermediate pressure
Nozzle
What are Ejectors?HOW EJECTORS WORK
Low Pressure
HighPressure
Intermediate Pressure
Ejectors use high pressure fluid to compress a low pressure fluid to an intermediate pressure
NozzleDiffuser
What are Ejectors?
An Ejector is a simple device which uses the energy within a high pressure fluid to entrain and compress
a low pressure fluid to an intermediate pressure.
HOW EJECTORS WORK
Low Pressure
HighPressure
Intermediate Pressure
Ejectors use high pressure fluid to compress a low pressure fluid to an intermediate pressure
NozzleDiffuser
What are Ejectors?
Ejectors are also known as Eductors or Jet Pumps.
HOW EJECTORS WORK
Low Pressure
HighPressure
Intermediate Pressure
Ejectors use high pressure fluid to compress a low pressure fluid to an intermediate pressure
NozzleDiffuser
Why choose Ejectors?
• No moving parts
• No maintenance
• Requires no electrical power
Why choose Ejectors?
• No moving parts
• No maintenance
• Requires no electrical power
• Often no operating costs
• Proven in service
• Simple construction
• Compact size / small footprint
Why choose Ejectors?
• Zero emissions
• Environmentally friendly
• Resistant to erosion
Why choose Ejectors?
• Zero emissions
• Environmentally friendly
• Resistant to erosion
• Handles liquid and gas slugs without damage
• Simple to start-up, operate & shut down
• Suitable for use with gasses and liquid
Why choose Ejectors?
... ideal features for use subsea!
• Zero emissions
• Environmentally friendly
• Resistant to erosion
• Handles liquid and gas slugs without damage
• Simple to start-up, operate & shut down
• Suitable for use with gasses and liquid
Possible Sources of HP Energy• HP gas well
• Compressor gas, recycled / discharged
• HP production separator gas
• Lift / Injection gas
HP Gas
Possible Sources of HP Energy• HP gas well
• Compressor gas, recycled / discharged
• HP production separator gas
• Lift / Injection gas
• HP oil well
• Injection water
• HP production separator liquid
• Pumped liquids, oil, water or mixture
HP Gas
HP Liquid
Potential Subsea Applications
• Production Boosting
• Subsea Processing
Potential Subsea Applications
• Production Boosting
• Subsea Processing
Example - Production Boosting
Duplex - Holland (10,000lb rated)
Example - Production Boosting
This Ejector increased production by 31.6mmscfd, by bringing two shut-in wells back into production.
Duplex - Holland (10,000lb rated)
Example - Production Boosting
• Boost production
• Reduce condensate loading
• Prevent wells becoming shut-in
• Extend field life
• Maximise recovery
The Ejector lowers pressures at the well head to:
Example - Production Boosting
Duplex - Holland (10,000lb rated)
Subsea field of the future!
Example - Production Boosting
Duplex - Holland (10,000lb rated)
Subsea field of the future!
Example - Production Boosting
This Ejector boosted production by ~15% using wasted energy across the anti-surge valve
and eliminated the need for 2nd stage compression
Example - Production Boosting
Subsea field of today!
Example - Production BoostingSolution:
HP gas from the existing compressor on recycle used to
power the jet pump.
Benefits:
• Lowered arrival pressure at the platform by 200 psi enabling
loaded wells to produce consistently.
• Higher gas velocities, lowered liquids accumulated in the
pipeline, causing a further 140psi drop at the wellhead.
• Production increased by 24% due to wellhead pressure
reduction and lower pipeline loss.
• 2.5 Bscf of otherwise lost reserves recovered.
• Flow delivered at higher pressure compressor suction
increased compressor throughput.
Export Sales
40MMSCFD
7.4 MMSCFD 850 psig
400 psig
Ejector 1250 psig
Sub sea manifold
Recycle gas
GEMINI
Liquid
Chevron, USA (GOM)
200 psig
Compressor
Separator
• Lowered arrival pressure at the platform by 200 psi, enabling loaded wells to produce consistently.
• Higher gas velocities swept most of the liquids accumulated in the pipeline, causing a further 140 psi pressure drop at the wellhead.
Subsea field of today!
Example - Production BoostingSolution:
HP gas from the existing compressor on recycle used to
power the jet pump.
Benefits:
• Lowered arrival pressure at the platform by 200 psi enabling
loaded wells to produce consistently.
• Higher gas velocities, lowered liquids accumulated in the
pipeline, causing a further 140psi drop at the wellhead.
• Production increased by 24% due to wellhead pressure
reduction and lower pipeline loss.
• 2.5 Bscf of otherwise lost reserves recovered.
• Flow delivered at higher pressure compressor suction
increased compressor throughput.
Export Sales
40MMSCFD
7.4 MMSCFD 850 psig
400 psig
Ejector 1250 psig
Sub sea manifold
Recycle gas
GEMINI
Liquid
Chevron, USA (GOM)
200 psig
Compressor
Separator
• Production increased by 24%, due to wellhead pressure reduction and lower pipeline loss.
• 2.5 Bscf of otherwise lost reserves recovered.
• Flow delivered at higher compressor suction pressure increased compressor throughput.
Example - Gas Lift Boosting
• Lower well back-pressure
• Increase production
• Deliver to export pressure
• Less lift gas required
Subsea field of the future!
• Lower well back-pressure
• Increase production
• Deliver to export pressure
• Less lift gas required
Example - Gas Lift Boosting
Potential Subsea Applications
• Production Boosting
• Subsea Processing
Potential Subsea Applications
• Production Boosting
• Subsea Processing
Subsea Processing with Ejectors
• Hydrocyclone pressure boosting
• Separator flushing
• Sand slurry pumping
• Sand cleaningTORDIS - The World’s First Full-Field Separation System, Offshore Norway
Subsea Processing with Ejectors
• Hydrocyclone pressure boosting
• Separator flushing
• Sand slurry pumping
• Sand cleaning
• Multi-phase fluid pumping
• Micro-bubble generation for conditioning process water
• Flow Restrictor / Pressure let-down
TORDIS - The World’s First Full-Field Separation System, Offshore Norway
Sand Slurry Pumping
Subsea Processing - Marlim
Transvac Ejector
Subsea Processing - Marlim Ejector 1
Patented Multi-Nozzle Subsea Ejector suppliedfor boosting flow as part of the separator flushing operation.
Subsea Processing - Marlim Ejector 2
Subsea Ejector supplied for boosting the pressure lost over hydrocyclones.
Subsea Processing - Marlim Flow Restrictor
Flow restrictors supplied for destroying excess pressure in the reject line of the multi-phase desander module.
Design & Performance Mapping
Marlim SSAO Project : FMC Technologies Performance Test Report – Special Flow Restriction
Doc. No.: Revision: Date: Pages:
PTR13233 0 04:05:11 7 of 23
Performance Test Report:
Marlim SSAO Project – Spec Flow Restriction 05.05.11 09:35
7
3.2 Photographs of the setup continued
Special Flow Restriction
NDP07
Transvac carried out full performance mapping/validation for each of the Ejectors and flow restrictors
supplied for the Marlim Project at our R&D facility.
Transvac R&D Test Facility
• 8 Liquid flow loops
• Pressures up to 250 bar
• Flows up to 700m3/h
• Sand slurry test rig
• Multi-phase flow loop
...for your fields of the future, consider Ejectors.
Who we are...
• Privately owned company
• Based in the United Kingdom
• Over 40 years experience
• Custom designed products, across many industries
• Transvac’s own patented designs
• In-house control over design, manufacture & non destructive testing
• R&D Test Facility
Thank you.Please visit us on stand B43 in the exhibition hall.
Current R&D Projects
• Micro-bubble generating device
• High pressure liquid Ejectors compressing gas
• Gas motivated Ejectors entraining liquids
Subsea Ejectors for Multi-Phase Handling
Transvac has performance tested Ejectors for multi-phase applications for subsea processing. Ejector technology is now proven to be a reliable and robust alternative to mechanical multi-phase pumps.
RemovableDiffuser / Throat
RemovableNozzle
Size 3 DuplexUniversal Design
Flare Gas RecoveryEjector & Silencers
Universal Design
QUALITY ASSURANCEQUALITY MANAGEMENT SYSTEM - ISO 9001:2008
This is to certify that:
Transvac Systems LimitedMonsal HouseBramble WayAlfretonDE55 4RHUnited Kingdom
Holds Certificate No: FM 33189and operates a Quality Management System which complies with the requirements of ISO 9001:2008 for the followingscope:
Design, Research & Development and manufacture of fluid jet, heat transfer and masstransfer equipment.Design, Research & Development and manufacture of fluid jet, heat transfer and masstransfer equipment.
For and on behalf of BSI:
Chair, Certification Body Management Committee.
Originally registered: 12/01/1996 Latest Issue: 21/12/2011 Expiry Date: 17/01/2015
Page: 1 of 1
This certificate was issued electronically and remains the property of BSI and is bound by the conditions of contract.An electronic certificate can be authenticated online.Printed copies can be validated at www.bsigroup.com/ClientDirectory
The British Standards Institution is incorporated by Royal Charter.BSI (UK) Headquarters: Kitemark Court, Davy Avenue, Knowlhill, Milton Keynes MK5 8PP. Tel: 0845 080 9000
Quality System Registration
Issued by: RSA Certification Services 17 York Street, Manchester, M2 3RS
This certificate remains the property of RSA Certification Services and is bound by the terms of the Certification Agreement
This is to certify that: Transvac Systems Ltd. Monsal House Bramble Way Alfreton Derbyshire DE55 4RH Has been granted Registration Certificate No: RSACS/368956-1/1 In respect of a Quality Management System which has been assessed and found to comply with the requirements of module H of Annexe III of the Pressure Equipment Directive 97/23/EC and Schedule 4 of the UK Pressure Equipment Regulations 1999 (SI 2001) for the following: SCOPE:
Design and manufacture of Pressure Equipment described as pressure vessels and pressure accessories for vacuum, fluid handling, heat transfer and gas scrubbing applications
For RSA:
_____________________________ First registered: 03 Feb 2003 Valid from: 10 Oct 2012 Expiry: 15 Feb 2015
• Transvac has a good reputation as a supplier of high quality custom design products
• Accredited to BS EN ISO 9001 : 2008
• Qualified on both FPAL No. 44491 & Achilles No. 25938
• Accredited to Module H of the Pressure Equipment Directive
• Promatomnadzor Permission of Belarus - Mozry Refinery
MECHANICAL DESIGN
• Design codes: PD5500, ASME VIII, ASME B31.3, RTOD and other standards
• Client Specs: NORSOK / Shell DEP
• Others: NACE (materials)
• In-house FEA capability
R&D Test Facility
CFD Ejector Modelling Sand Slurry Ejector CFD Modelling
High pressure performance mapping with gas injection
Why choose Ejectors? What is the alternative?
• Special designs & construction
• Maintenance issues
• Heavy construction
• Huge energy costs
• High capex cost
• Large footprint
Transvac R&D Test Facility
Subsea field of the future!
Example - Production Boosting
