Wet Compression Bryan V. Butler Manager, Multiphase Systems Bryan V. Butler Manager, Multiphase...
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Wet Compression Bryan V. Butler Manager, Multiphase Systems Email: [email protected] A New Surface Flow Management Tool A New Surface Flow Management Tool
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Transcript of Wet Compression Bryan V. Butler Manager, Multiphase Systems Bryan V. Butler Manager, Multiphase...
Wet CompressionWet Compression
Bryan V. ButlerManager,
Multiphase Systems
Bryan V. ButlerManager,
Multiphase Systems
Email: [email protected]: [email protected]
A New Surface Flow Management ToolA New Surface Flow Management ToolA New Surface Flow Management ToolA New Surface Flow Management Tool
© Weatherford. All rights reserved.
What is “Wet Compression”?
Gas and liquids in the same flow line
Gas is the predominant, continuous phase
Gas Volume Factor (GVF) is high: 95 to 99+%
© Weatherford. All rights reserved.
Types of Wet Compressors
Positive Displacement
Twin Screw
Mass Transfer
RamPump™ System
© Weatherford. All rights reserved.
Wet Compression
Liquids help compress gas Liquids control slip flow
Liquids help compress gas Liquids control slip flow
Twin Screw Multiphase PumpTwin Screw Multiphase Pump
© Weatherford. All rights reserved.
Wet Compression
Linear Displacement Compression Liquids help efficiency
Linear Displacement Compression Liquids help efficiency
Mass Transfer PumpMass Transfer Pump
© Weatherford. All rights reserved.
Wet Compression
Operates similar to: Operates similar to:
Linear Displacement Compression No liquid requirement
Linear Displacement Compression No liquid requirement
RamPump™ SystemRamPump™ System
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Wet Compression
LIQUIDTRAP
(IF NEEDED)
WET COMPRESSOR SKID
DISCHARGE
SUCTION
Installation – Field PipingInstallation – Field Piping
© Weatherford. All rights reserved.
Wet Compression
Provide Isolation and Bypass (all units)
Provide Recirculation and Safety Relief (except RamPump)
Provide Liquid Trap if needed (except RamPump)
Provide Isolation and Bypass (all units)
Provide Recirculation and Safety Relief (except RamPump)
Provide Liquid Trap if needed (except RamPump)
Capacity must allow for extended gas slugging
Filter seal flush liquids
Option -- Double Mechanical Seal System
Option -- Independent Coolant/Flush Line
Capacity must allow for extended gas slugging
Filter seal flush liquids
Option -- Double Mechanical Seal System
Option -- Independent Coolant/Flush Line
Installation – Field PipingInstallation – Field Piping
© Weatherford. All rights reserved.
Wet Compression
Downstream Pressure: Determined by downstream conditions
Inlet Pressure: Determined by pump rate
Downstream Pressure: Determined by downstream conditions
Inlet Pressure: Determined by pump rate
Rate Control Methods:Rate Control Methods:Twin Screw & Mass Transfer PumpsTwin Screw & Mass Transfer PumpsTwin Screw & Mass Transfer PumpsTwin Screw & Mass Transfer Pumps
VFDs for Electric Drive (100% -30%)
Throttle Controls - Engine Drive
Automatic Recirculation Controls
Transmissions or Belts & Pulleys
May need PLC
VFDs for Electric Drive (100% -30%)
Throttle Controls - Engine Drive
Automatic Recirculation Controls
Transmissions or Belts & Pulleys
May need PLC
RamPump SystemRamPump System
Hydraulic (100% - 0%)
4-20 ma signal from pressure/level Xducer
Throttle (Manually Set)
Hydraulic (100% - 0%)
4-20 ma signal from pressure/level Xducer
Throttle (Manually Set)
Installation - ControlsInstallation - Controls
© Weatherford. All rights reserved.
Wet Compression
Compressor are rated by SCF
Multiphase Pumps are rated by flow rate at inlet conditions
Wet Compressors are pumping equivalent barrels of gas
Formula to convert to MSCFPD from BPDe:
Compressor are rated by SCF
Multiphase Pumps are rated by flow rate at inlet conditions
Wet Compressors are pumping equivalent barrels of gas
Formula to convert to MSCFPD from BPDe:
MSCFPD = 0.1986 x BPDe x (p+14.7)/(t + 460) Where p = psig; t = deg F
Flow RatingsFlow Ratings
© Weatherford. All rights reserved.
Wet Compression
Pumps affected different ways: Pumps affected different ways:
Twin Screw Twin Screw
Casing and Rotors
Seal System
Slip Flow Increases
Casing and Rotors
Seal System
Slip Flow Increases
Mass TransferMass Transfer
Higher Rod Loads Higher Rod Loads
Cylinder Walls
Volumetric Effic.
Cylinder Walls
Volumetric Effic.
Ram Pump Ram Pump
Higher Hyd. Press.
Stronger Hsg Wall
Volumetric Effic.
Higher Hyd. Press.
Stronger Hsg Wall
Volumetric Effic.
Mass Flow Rate is Affected by Compression RatioMass Flow Rate is Affected by Compression RatioMass Flow Rate is Affected by Compression RatioMass Flow Rate is Affected by Compression Ratio
Compression Ratios and Operating PressuresCompression Ratios and Operating Pressures
© Weatherford. All rights reserved.
Wet Compression
High Compression Ratios – Staged InstallationHigh Compression Ratios – Staged Installation
Hi-Vol
Low Press.Low Vol.
Hi-Press.SurgeVessel
30psig
250psig
800psig
Cr = 5.9 Cr = 3.1
Cr = 18.2
© Weatherford. All rights reserved.
Thank you for your attentionThank you for your attention
Bryan V. Butler
Manager,Multiphase Systems
11909 Spencer Rd. (FM 529)Houston, Tx. 77041USA
Main: 713 983-5000Direct: 713 983-5223Fax: 713 983-5040Mobile 281 705-6228
Email: [email protected]
