Costain / Gas Processing /
NGL
Extraction
Processing of natural gas is typically required to meet pipeline
hydrocarbon dewpoint specifications. Deeper recovery of NGL
components can be justified based on their higher value as
separate products compared with their value as sales gas.
Saturated and higher value unsaturated hydrocarbons from refinery and
petrochemical offgas streams can also be recovered to reduce flare gas and
provide additional products or feedstocks with attractive payback times.
Costain has completed projects worldwide ranging from hydrocarbon dewpoint
control to almost total propane recovery and deep ethane extraction. Continuous
optimisation of our cryogenic technologies ensures highly efficient process
integration, offering outstanding liquids recovery to maximise benefits of NGL
extraction whilst minimising power consumption.
PROPRIETARY
TECHNOLOGY FOR
HIGH RECOVERIES AT
MINIMUM COST
DESIGN TAILORED
FOR FEEDSTOCK, LPG
SPECIFICATIONS AND
CUSTOMER NEEDS
FULL ENGINEERING
CAPABILITY ACROSS ALL
PHASES OF THE PROJECT
LIFECYCLE
COSTAIN’S CAPABILITY
PROPRIETARY TECHNOLOGY
Costain offers a comprehensive capability ranging
from basic design packages and technology licensing
agreements, to detailed engineering, procurement and
construction management. In addition we offer ongoing
process and operational technical support.
We have developed effective processes integrating NGL
extraction with cryogenic nitrogen rejection as well as
recovering NGL from liquefied natural gas. In addition
to NGL recovery, we are also experienced in supplying:
• downstream fractionation of liquids to produce a
range of hydrocarbon products
• removal of contaminants (e.g. sulphur) to meet
product specifications
• separation of ethane from carbon dioxide
• storage facilities
Our portfolio of patented technology includes a process
achieving propane recoveries as high as 99% as well as
technology achieving deep ethane recoveries with high
CO2 tolerance. In addition, efficient use of cryogenic
turbo-expanders and mechanical refrigeration can offer
lower capital cost and reduced operating costs.
Our experience includes expertise in process module
design; maximising prefabrication minimises onsite
construction time and provides improved health and
safety control.
www.costain.com
Processes are customised to suit our clients’ particular
feedstock, product requirements and energy costs,
optimising plant design and minimising lifecycle
costs. They can also be applied to revamp and
debottlenecking projects to cater for changes in feed
conditions or achieve increased liquids recovery.
As well as designing and constructing NGL recovery
facilities, we also offer innovative, proprietary
technologies available for licensing.
Costain / Gas Processing /
Øyvind Hagen / Statoil
NGL EXTRACTION
px LTD, TEESSIDE, UK
NGL RECOVERY & FRACTIONATION
STATOIL KÅRSTØ, NORWAY
NGL RECOVERY & FRACTIONATION
• Only UK plant with the flexibility to switch
between hydrocarbon dewpointing and optimised
NGL recovery to meet market conditions
• High recovery (>99% of feed NGL) at Europe’s
largest natural gas processing plant
• Can switch between low (25%) and high (up to 80%)
propane recovery
• Two trains of 400MMSCFD each
• Conceptual design for two NGL recovery trains
based on Costain’s proprietary technology
• Further work included a study for enhanced ethane
recovery, identifying a potential cost-effective solution
with >95% ethane recovery
CONCEPTUAL STUDIES
FEED
DESIGN EPC
PROCESS STUDIES
PROJECT MANAGEMENT
COMMISSIONING SERVICES
COST ESTIMATES
CONCEPTUAL STUDIES
UNITED GAS DERIVATIVES COMPANY, EGYPT
NGL RECOVERY, FRACTIONATION & STORAGE
SHELL E&P, SCOTLAND
TURBO-EXPANDER DEBOTTLENECKING
• Pre-FEED consultancy services 1100 MMSCFD
NGL extraction and fractionation plant for UGDC
(BP, Eni and GASCO JV)
• Part of the term services contract covering work
for Mossmorran, St. Fergus and Braefoot Bay
• Designed for NGL recovery of >99%
• Independent review of third party technologies for
process plant, propane storage and export facilities
and interconnecting pipelines
CONCEPTUAL STUDIES
• Capacity expansion of existing NGL extraction
facilities to 1000 MMSCFD at St. Fergus gas
terminal, UK
• Turbo-expander units replaced in a live plant
environment within tight shutdown windows
PROJECT MANAGEMENT
TECHNICAL MANAGEMENT
CONCEPTUAL STUDIES
DESIGN
SAFETY AND ENVIRONMENTAL ASSESSMENTS
PROCUREMENT CONSTRUCTION MANAGEMENT
Manchester
//
Teesside
//
Aberdeen
//
London
www.costain.comoilandgas@costain.com
//
Maidenhead
+44 161 910 3444