Hi Per Factsheets Overview
- 1. ASCOM Three phase separators Compact, efficient and less sensitive to wave motion The performance requirements of horizontal SHEET NO. 1 | JULY 2010 three phase separators have experienced a strong development in the past decade. This resulted from increasingly challenging separation duties, i.e. on FPSO‘s. ASCOM separator designs stand out for two reasons: 1) sophisticated dynamic CFD simulation design methods are routinely used to optimise the use of available space in the vessel; 2) proprietary state-of-the-art separation internals are applied with unmatched performance characteristics. New build and revamp The Ascom design methodology can easily be applied to improve the performance of existing separators. All internals can be installed through manways. Overall design methodology Ascom separators are designed so that upon entry the fluids are efficiently pre-separated into a gas and liquid phase. These two flows then are carefully distributed over the gas and liquid section of the separator. This is achieved by the inlet device, a critical component of the separator, and by using Computational Fluid Dynamics(CFD)design methods to optimise the flow path of the two fluid phases. Oil / water separation The even distribution of the liquid phase is achieved Summary through the use of customised distribution baffles, The advantages of ASCOM separators / HiPer which can also mitigate any occurring wave motion. separation internals are: The application of an ASCOM HiPer coalescer plate • Minimum separator size pack can further enhance the oil/water separation • Maximum overall liquid separation efficiency performance of the separator. from gas, • Maximum oil from water and water from oil Gas / liquid separation separation efficiency, The bulk of the gas/liquid separation takes place in • Less sensitive to any wave motion of FPSO‘s and directly downstream of the inlet device. ASCOM • Excellent turndown characteristics, offers a full range of different inlet devices, ranging • Low pressure drop, from vane type inlet devices to the powerful HiPer • Clean & fouling service possible, inlet cyclones to take on any challenge. • No maintenance due to robust design, Downstream of the gravity separation section the • Installation through manway, proprietary ASCOM demisting internals will • No welding required for installation, guarantee the removal of any remaining fine liquids. • Easily replaces existing older internals. Further reading: Factsheet 11/12 HiPer Inlet Diffusers Factsheet 13/14/15 HiPer Mist Eliminating Equipment Factsheet 16 HiPer Perforated Distributor
- 2. ASCOM Scrubbers (gas/liquid separators) Maximising performance, minimising carryover Improving the gas / liquid separation SHEET NO. 2 | JULY 2010 efficiency of vertical separators (‗Scrubbers‘) can relatively easily be achieved through the thorough consideration of the fluid flows into and within the vessel and ensuring these flows are handled in a smooth manner. The selection of high performance vessel internals in this regard is critical as the cost benefits of cheap internals do not weigh up to the advantages of achieving much higher separation efficiencies and the risks of poor performance, e.g. compressor failure(s). Inlet device: the most critical item The most critical item is the selection of the inlet device. In the industry a wide range of types is being used, ranging from inlet baffles, half open pipes to more elaborate vane type inlet devices and cyclonic inlet devices. Irrespective of the service, only vane type inlet devices and cyclonic inlet devices will handle the fluids smoothly enough at the inlet nozzle to benefit most during the remaining separation process. This is being recognized by ASCOM and this approach has also been applied to the other internals in the HiPer product range! Droplet coalescence: maximizing overall performance The bulk of the separation takes place by gravity between the inlet nozzle and the mist eliminating equipment. In situations where conditions are demanding (high liquid loading, high operating Summary pressure, small vessel) coalescers can be considered The advantages of the ASCOM HiPer internals to maximise separation efficiency. Obviously this are: technology can also be employed to reduce the vessel size. • Maximise droplet coalescence, • Maximise overall liquid separation efficiency Mist elimination: protection of downstream from gas, equipment • Excellent turndown characteristics, The overall mist eliminating efficiency depends on the • Low pressure drop, amount of liquid entrained in the gas, the droplet size • Clean & fouling service possible, distribution, and the efficiency of the mist eliminating • No maintenance due to robust design, equipment. The equipment will be selected and • Removable through Man Way, designed such to ensure the highest performance • No welding required for installation, under the particular operating conditions. • Easily replaces existing older internals. Further reading: Factsheet 11/12 HiPer Inlet Diffusers Factsheet 13/14/15 HiPer Mist Eliminating Equipment
- 3. HiPer MixedFlow de-oiling hydrocyclones Compact produced water treatment Tangential deoiling hydrocyclones have long been present on the upstream produced SHEET NO. 3 | JULY 2010 water market. With governments around the globe increasingly sharpening the maximum allowable oil in water discharge quantities to a maximum of 20 ppm and below, convention-nal hydrocyclones are often not adequate to meet these new national and international regulations. MixedFlow Hydrocyclones Contrary to tangential or axial cyclones, the ASCOM MixedFlow Hydrocyclone is based on a mixed flow principle, which results in a stabilizing and coalescing effect on the oil-water flow. All available pressure energy is converted in to a rotating motion within the cyclone. This results in the generation of much higher G-forces that will be responsible for an adequate and stable oil- water separation. Adverse effects usually emerging in conventional cyclones, such as boundary layer disturbances and flow-destabilization do not occur and, not surprisingly, recent test data confirms earlier findings that the ASCOM MixedFlow Hydrocyclone has an excellent performance by showing both very high separation efficiency and a low pressure drop. Summary The advantages of the ASCOM MixedFlow Hydrocyclone are: • Extremely high separation efficiency, • Very low pressure drop, • Low maintenance due to robust design, • Easily replaces existing hydrocyclone liners. Further reading: Factsheet 11/12 HiPer Inlet Diffusers Factsheet 13/14/15 HiPer Mist Eliminating Equipment
- 4. HiPer Vane Diffuser Maximising the gas / liquid separation efficiency SHEET NO. 11 | JULY 2010 In the processing industry a wide range of inlet devices are being used ranging from inlet baffles, half open pipes to more elaborate vane type inlet devices and cyclonic inlet devices. Irrespective of the service, only vane type inlet devices and properly designed cyclonic inlet devices will handle the fluids at the inlet nozzle adequately and will maximise the separation performance. All other inlet devices will result in a very poor gas distribution AND in an increase of the liquid content entrained in the gas due to the high shear forces exerted by these devices. Ensuring excellent bulk gas / liquid separation The overall separation efficiency of a particular vessel can only be maximised when the bulk amount of the liquid is separated at the inlet nozzle. This requires the incoming fluid flow to be smoothly introduced into the vessel such that the velocities are reduced and the liquid can separate by gravity. The ASCOM HiPer Vane Diffuser will ensure an adequate gas distribution as a direct result of its aerodynamically optimised vane geometry. The geometry and layout contain large open areas and therewith ensures that there is no additional pressure drop, no potential for blockage and no maintenance required due to the very robust design. Summary The advantages of the ASCOM HiPer Vane Diffuser are: • Smooth introduction of fluids in to vessel, • Maximises liquid drop-out, • Good gas distribution, • Integrated Flow Conditioner, • No pressure drop, • No blockage possible due to large open areas, • No maintenance due to robust design, • Removable through Man Way, • No welding required for installation, • Easily replaces existing older inlet devices. Further reading: Factsheet 11/12 HiPer Inlet Diffusers Factsheet 13/14/15 HiPer Mist Eliminating Equipment
- 5. HiPer Inlet Cyclone Maximising the gas / liquid separation efficiency The HiPer Inlet Cyclone Separator can be SHEET NO. 12 | JULY 2010 applied as inlet device in both vertical and horizontal 2 and 3 phase separators. The HiPer Inlet Cyclone is based on the principle of creating centrifugal forces in order to perform efficient gas-liquid separation. The multiphase flow from the inlet piping is gently introduced into the cyclone with a special designed low shear inlet section. Inside the cyclone gas and liquid are separated by g forces, liquid flows downwards into the liquid section of the separator and gas exits through the vortex finder of the inlet cyclone after which further demisting can be performed in downstream equipment if necessary. Ensuring excellent liquid-liquid separation and foam breaking performance The low shear design and moderate g forces in the HiPer Inlet Cyclone are beneficial in three phase separation and applications where foam is present in the inlet stream due to the foam breaking performance of the cyclone. Strong reductions of anti-foam chemicals are possible with HiPer Inlet Cyclones in foam sensitive applications. Summary The advantages of the ASCOM HiPer Inlet Cyclone Diffuser are: • High gas and liquid handling capacity, • Efficient bulk gas-liquid separation, • Low shear design to enhance oil-water separation, • Geometry optimised with R&D and CFD simulations, • Foam breaking, • No maintenance due to robust design, • Installation through Man Way, • No welding required for installation, • Wide operating range of 0—100% of design flow, • Easily replaces existing older inlet devices.
- 6. HiPer Mesh Mist Eliminator Droplet removal for a wide range of conditions Wire mesh mist eliminators have long been SHEET NO. 13 | JULY 2010 applied in the upstream and downstream processing industries. As a stand-alone device or in combination with vane or cyclone mist eliminators this device can be used over a wide range of non-fouling operating conditions. Characteristics The HiPer Mesh Mist Eliminator is a highly efficient mist eliminating device within its operating window. It is suitable for non-fouling environments; it has excellent turndown properties (25 – 100%) and can be used in a wide range of services such as separators, compressor suction scrubbers and dehydration columns, both in new built and retrofit applications. It is made of multiple layers of crinkled wire and therewith is able to catch and agglomerate small droplets and limit the carryover to a minimum. The mesh will be made according to the material specification in the vessel datasheet and designed to fit the respective vessel diameter. It will be made in sections small enough to be removable through the Man Way. Summary The advantages of the ASCOM Mesh Mist Eliminator are: • Maximises liquid droplet separation from gas within operating window, • Significantly increased liquid handling capacity, • Excellent turndown properties (25 – 100%), • No maintenance due to robust design, • Removable through Man Way, • No welding required for installation, • Easily replaces existing older demisting equipment.
- 7. HiPer Vane Mist Eliminator Good performance in LP and fouling services Vane mist eliminators have long been applied SHEET NO. 14 | JULY 2010 in the upstream and downstream processing industries. As a stand-alone device or in combination with cyclone mist eliminators this device can be used over a wide range of fouling and non-fouling operating conditions. Characteristics The HiPer Vane Mist Eliminator is an efficient mist eliminating device within its particular operating window. Industry experience learns that the droplet separation efficiency of vane mist eliminators operating at pressures greater than 10 barg rapidly decreases. Vane mist eliminators are suitable for fouling and non-fouling environments and can be used in a wide range of services such as separators and compressor suction scrubbers, both in new built and retrofit applications. The vane mist eliminators are made of curved parallel plates with special characteristics related to the particular service to collect and drain the liquid separated. It will be made in sections small enough to be removable through the Man Way. Summary The advantages of the ASCOM Vane Mist Eliminator are: • Wide range of Vane Mist Eliminators designed for various services, • Suitable for fouling service, • No maintenance due to robust design, • Removable through Man Way, • No welding required for installation, • Easily replaces existing older demisting equipment.
- 8. HiPer Cyclone Mist Eliminator State-of-the-art cyclonic mist elimination In situations where the conditions are demanding due to an elevated operating pressure, a large amount of liquid entrained SHEET NO. 15 | JULY 2010 in the gas or limited gas space / vessel diameter available, demisting cyclones have increasingly been accepted over the past decade. To date several generations of mist eliminating cyclones have been put in to operation. ASCOM now introduces: The Newest Generation of cyclonic mist eliminating: State-of-the-art (2008) Mist elimination using ASCOM HiPer Mist Elimination Cyclone Advanced aeronautical Particular and significant improvements have been design expertise made to the cyclone design using the special advanced aeronautical technology for optimising the Efficiency: +++ vane blade’s aero dynamical shape to achieve an even Low pressure drop: ++ better pressure to velocity conversion. This leads to Turndown: ++ reduced pressure drops and lower shear stresses Compactness: +++ between the gas and liquid within the cyclone. These two parameters allow a higher gas flow rate per Previous generations of mist eliminating cyclone tube and consequentially this can lead to smaller vessel sizes or higher throughputs in retrofit cyclones included the following types: situations. In addition to this, the cyclones liquid handling capacity has been increased significantly. 1st Generation (1940) Reverse Flow Cyclone This makes the ASCOM Cyclone Mist Eliminator not Change of gas flow direction just another 3rd Generation Cyclone type, but its capabilities push the cyclone to a whole new level: Efficiency: ++ Low pressure drop: -- The next generation in demisting!! Turndown: - Compactness: -- Summary The advantages of the ASCOM HiPer Mist 2nd Generation (1980) Eliminating Cyclones are: Axial Flow Cyclone • Newest Generation demisting cyclones, No change of gas flow direction • Designed with advanced aeronautical technology, Efficiency: + • Maximises liquid droplet separation from gas, Low pressure drop: + • Significantly increased liquid handling capacity, Turndown: - • Excellent gas distribution properties, Compactness: + • Excellent performance in fouling service, • Reduced pressure drop, 3rd Generation (1995) • No maintenance due to robust design, Pure Axial Recycle Flow Cyclone • Removable through Man Way, Recycle of secondary gas flow • No welding required for installation, • ASCOM State of the Art technology, Efficiency: ++ • Easily replaces existing older mist eliminating Low pressure drop: + equipment. Turndown: +/- Compactness: ++
- 9. HiPer Perforated Distributor Optimised oil / water separation & wave mitigation When gas and liquid enter a horizontal SHEET NO. 16 | JULY 2010 vessel the flow velocity is relatively high and only after the flows properly have been distributed over the entire available cross- sectional area, separation can take place to achieve the efficiencies predicted by calculation. Liquid Distribution Optimised For horizontal vessels equipped with vane type inlet devices the fluids are being introduced much more evenly and consequently at lower velocities. As a result of the pressure drop over the downstream demisting equipment an even gas distribution can be achieved. However, for vessels equipped with cyclonic inlet devices the gas exiting these cyclones in jets needs redistribution to maximise the liquid drop out due to gravity separation. In order to maximise the separation of oil droplet from water and water droplets from oil separation, horizontal three phase separators require distributions baffles in the liquid phase. The liquids dropping down from the vane type inlet device or those being introduced through the inlet cyclones create a highly turbulent inlet liquid zone. The liquid velocities need to be reduced and evenly distributed over the entire cross-sectional area. This is best achieved by introducing liquid distribution baffles. Summary The advantages of the ASCOM HiPer Perforated Distributor are: • Maximises liquid droplet separation from gas, • Maximises oil separation from water, • Maximises water separation from oil, • Excellent sand handling capability, • Low pressure drop, • No maintenance due to robust design, • Equipped with removable Man Way, • Removable through vessel Man Way, • No welding required for installation, • Easily replaces existing older perforated baffles.
- 10. HiPer Solids Removing Cyclones Robust, reliable & qualified for sub-sea separation Produced sand can be removed from one or Multi-Purpose Applications more well streams at a wellhead platform or In view of the low water requirement and the ability to SHEET NO. 19 | JULY 2010 remote location, but it is not always fluidise considerable amounts of solids within a practical or economical to do so. Therefore, reasonable period of time, the HiPer Solids Removing most operators chose to have the sand Cyclone forms the basis of ASCOM’s solids handling approach. Besides removing solids from a vessel, the settle in the separators first, from where it cyclone can be employed to transport accumulated can be removed from the process system. solids over a larger distance to a bagging station for The first step thereto is to fluidise the sand instance, or used to cycle the solids between into a motion fluid and route it to a location accumulators during solids cleaning operations. for accumulation, cleaning and packaging. Principle ASCOM has developed a number of complemen- tally solutions to fluidise solids. The HiPer Solids Removing Cyclones introduce a cyclonic flow of produced water into the layer of solids which leads to the fluidisation of the particles. The cyclonic flow also creates a low pressure zone in the eye of the cyclone, exactly where the extraction point is located. This pressure gradient drives the slurry removal. Per Solids Removing Cyclone a water flow rate is required of less than 5 m3/hr at a minimum pressure above the vessel’s operating pressure. However, at low operating pressures in order to extract the slurry from the vessel and process it to its designated location, the flow may require boosting. Summary Effective Removal Zone The advantages of the ASCOM HiPer Sand Subject to the availability of produced water and the Removing Cyclone: area that needs to be covered, one or more Solids • Low motion fluid flow rate required Removing Cyclones can be installed in one or • Good sand fluidisation & removal multiple sections. A minimum distance is kept • Excellent sand removal in combination with between the cyclones for the circulating water flow HiPer Sandjetting System around each cyclone not to interfere with one • Not prone to blockage another. The effective solids removal zone is • Excellent performance in fouling service approximately 1 meter in diameter and as a • Excellent pressure drop characteristics consequence, solids outside this zone will only be • Low maintenance due to robust design removed provided the angle between the solids and • Removable through Man Way the effective removal zone is larger than 34 • No welding required for installation degrees, the repose angle of sand. • Easily replaces existing older sparging equipment Reliability confirmed for Sub-Sea Separation • Can be used in combination with: In view of the fact that the Solids Removing Cyclone HiPer Sandjetting System, only contain large openings, the design is very HiPer Solids Accumulator, robust and very reliable, to such extend that the HiPer Solids Cleaning System, and technology has been qualified for use in sub-sea HiPer Solids Bagging Station. separators by a major oil company.
- 11. ASCOM TwinLine Gas/Liquid Separator Compact, highly efficient & built to piping code The space availability for economic Higher liquid handling capacity, incl. under debottlenecking of existing facilities has dynamic flow conditions such as slugs SHEET NO. 31 | JULY 2010 increasingly reduced and the installation of As a result of an overall higher separation efficiency minimal facility platforms has significantly achieved in two stages, firstly the liquid load to the downstream equipment is significantly less, and/or increased over the past decade. This secondly the TwinLine Gas/Liquid Separator can resulted in the development of compact handle and increased liquid flow compared to the (―in-line‖) gas-liquid separation equipment, conventional single-stage design with similar built according to piping specification. performance. This makes the TwinLine Separator much more reliable under more dynamic flow Design improvements conditions, as the second stage effectively and ASCOM has developed and patented a set of new efficiently watches over the performance of the first innovative solutions to overcome the limitations stage and covers where necessary. experienced with the first generation of compact separation equipment. The particular design Improved turndown performance approach that forms the basis of these solutions As a result of its design, a TwinLine Separator has a leads to a stabilizing and coalescing effect of the better turndown performance than a conventional fluid flow and adverse effects usually experienced in single boot inline separator design. Under turndown inline cyclones, such as boundary layer conditions the first separation stage will likely see a disturbances and flow-destabilization, do not occur. reduction in the separation efficiency as the reduced In addition, the TwinLine Gas/Liquid Separator is driving force may affect the liquid film stability. This based on a 2-stage separation principle. often leads to liquid carryover. Due to the presence of the second stage and due to its particular design This results in the ASCOM TwinLine Gas/Liquid characteristics, the fluids’ motion is reinforced such Separator design to stand out in three areas: that efficient droplet separation can occur, even 1) Higher overall liquid separation efficiency, under turndown conditions. 2) Higher liquid handling capacity, incl. under dynamic flow conditions such as slugs, 3) Improved turn-down performance. Higher overall liquid separation efficiency The first stage of the TwinLine Gas/Liquid Separator is designed to separate the bulk of the liquid, similar to a conventional and single boot inline separator. Where the liquid not separated in this stage becomes actual carryover in the conventional design, the second stage of the TwinLine Gas/Liquid Separator reinforces the fluids’ rotational motion due to the particular design characteristics, such that the droplets still entrained can be separated efficiently. The estimated liquid from gas separation efficiency for the conventional design would be in the range of 90 to 98%, subject to the particular operating conditions. The estimated liquid from gas separation efficiency achieved by the TwinLine Gas/Liquid Separator is similar to a conventional design in the first stage and whereas the second stage boosts the overall separation efficiency and operational reliability under dynamic flow conditions.
- 12. Summary The advantages of ASCOM TwinLine Gas/Liquid Separators: • Very compact design – ―In-Line‖, minimising space and weight requirements • High separation efficiency • High Liquid content in Gas can be handled • One or multiple separation stages SHEET NO. 31 | JULY 2010 • Low pressure drop • Low maintenance due to robust design • Retrofit: replaces existing pipe spools upstream of a scrubber or dehydration column • New built: can replace 2-Phase separators in combination with a compact scrubber • Very suitable for compact separation units to be used in marginal field development • Can be used in combination with other compact separation equipment such as Compact Desanding Cyclone, Compact De- oiling Cyclone and Compact Degassing Cyclone.
- 13. ASCOM Inline Desander Compact, highly efficient & built to piping code The space availability for economic Desander an ideal technology to remove the bulk of debottlenecking of existing facilities has the sand before it enters the separator. This can SHEET NO. 32 | JULY 2010 increasingly reduced and the installation of save significant downtime and associated costs to minimal facility platforms has significantly remove the sand from the separators manually. The Inline Desander can be installed during a brown field increased over the past decade. This modification project or integrated in the process resulted in the development of compact during the engineering stage of a new built facility. (―in-line‖) gas-liquid-sand separation equipment, built according to piping specification. Design improvements ASCOM has developed and patented a set of new innovative solutions to overcome the limitations experienced with the first generation of compact separation equipment. The particular design approach that forms the basis of these solutions leads to a stabilizing effect of the fluid flow and adverse effects usually experienced in inline cyclones, such as boundary layer disturbances and flow-destabilization, do not occur. This results in the ASCOM Inline Desander design to stand out in three areas: 1) High overall sand separation efficiency, 2) High gas handling capacity, 3) Low pressure drop. In situations where the sand load is very high or High overall sand separation efficiency sand slugs may be occurring, the Inline Desander The fluids are brought into rotation by a static swirl can be designed in a 2-stage configuration. In the element. This swirl element is designed using air-foil first stage, the bulk of the sand is separated and in technology to ensure a stable flow in the separation the second stage, as a result of the smaller diameter chamber. As the direction and the velocity of the of the cyclone, a separation polishing effect is fluid flow are identical around the circumference of achieved due to the higher g-forces generated. the desanding cyclone, this leads to a very stable liquid film and boundary layer through which the particles migrate to the wall. In the event gas is present, the liquid film is further stabilized. The absence of disturbances in the liquid film avoids significant particle re-entrainment. In addition to this, in order not to disrupt the driving force that keeps the liquid film stable, the gas and liquid flow are extracted in a very gradual manner from the separation chamber. This leads to a high overall sand separation efficiency in a highly compact manner. The separation efficiency of the ASCOM Inline Desander is significantly higher than that of commonly used sand traps. This makes the Inline
- 14. High gas handling capacity As a direct result of the even fluid flow distribution across the circumference of the Inline Desanding cyclone and the gradual extraction of the fluids from the separation chamber, the Inline Desander is able to handle a gas volume fraction of 0 – 100%. When processing fluids with high gas volume SHEET NO. 32 | JULY 2010 fractions, the liquid film is actually stabilised and as a result the sand separation efficiency continues to be high. The Inline Desander is always tailor-made to suit certain pressure drop limitations and efficiency requirements. The designs proposed typically consider the bigger picture and are therefore often unconventional and making use of ASCOM’s complementary compact separation technologies. Yet they are attractive for their compactness, cost & delivery time. Summary The advantages of ASCOM Inline Desander: • Very compact design – ―In-Line‖, minimising space and weight requirements • High separation efficiency • Streams with 0 – 100% Gas Volume Fraction can be handled • One or two separation stages, if required • Low pressure drop • Low maintenance due to robust design • Retrofit: replaces existing sand traps, older desanding cyclones or pipe spools upstream of a separator • New built: can replace 2-Phase separators in combination with a compact scrubber • Very suitable for compact separation units to be used in marginal field development • Can be used in combination with other compact separation equipment such as Compact Degassing Cyclone.
- 15. ASCOM TwinLine Degasser Compact, highly efficient & built to piping code The space availability for economic Improved turndown performance debottlenecking of existing facilities has As a result of its design, a TwinLine Degasser has a SHEET NO. 33 | JULY 2010 increasingly reduced and the installation of better turndown performance than a conventional minimal facility platforms has significantly single boot inline degasser design. Under turndown conditions the first separation stage will likely see a increased over the past decade. This reduction in the separation efficiency as the reduced resulted in the development of compact driving force may affect the gas core stability. (―in-line‖) gas-liquid separation equipment, Subject to the pressure drop available on the gas built according to piping specification. side, this may lead to a reduced gas extraction. Due to the presence of the second stage and due to its Design improvements particular design characteristics, the fluids’ motion is ASCOM has developed and patented a set of new reinforced such that efficient gas separation can innovative solutions to overcome the limitations occur, even under turndown conditions. experienced with the first generation of compact separation equipment. The particular design approach that forms the basis of these solutions leads to a stabilizing and coalescing effect of the fluid flow and adverse effects usually experienced in inline cyclones, such as boundary layer disturbances and flow-destabilization, do not occur. In addition, the TwinLine Degasser, subject to the performance requirements and operating conditions, is based on a single or dual-stage separation principle. This results in the ASCOM TwinLine Degasser Summary design to stand out in two areas: The advantages of ASCOM TwinLine Degassers: 1) Higher overall gas separation efficiency, • Very compact design – ―In-Line‖, minimising 2) Improved turn-down performance. space and weight requirements • High separation efficiency Higher overall gas separation efficiency • High Gas content in Liquid can be handled The first stage of the TwinLine Degasser is • One or multiple separation stages designed to separate the bulk of the gas. Where the • Low pressure drop gas not separated in the first stage becomes actual • Low maintenance due to robust design carryunder in the conventional design, the second • Changes the gas/liquid flow regime favorably stage of the TwinLine Degasser reinforces the fluids’ • Retrofit: replaces existing pipe spools rotational motion due to the particular design upstream of a separator or metering skid characteristics, such that the gas bubbles still • New built: can replace 2-Phase separators in entrained can be separated efficiently. combination with a TwinLine Gas/Liquid Separator The estimated gas from liquid separation efficiency • Very suitable for compact separation units to achieved by the TwinLine Degasser is similar to a be used in marginal field development conventional design in the first stage and whereas • Very suitable for compact separation units to the second stage boosts the overall separation be used in sub-sea separation efficiency and operational reliability under dynamic • Can be used in combination with other flow conditions. However, where sufficient pressure compact separation equipment such as drop for the gas phase and sufficient liquid carryover TwinLine Gas/Liquid Separator, Compact handling capacity for the liquid is available, a single Desanding Cyclone, Compact De-oiling stage Degasser could be sufficient to achieve the Cyclone. required performance.