1 / 13

Wet Compression

Wet Compression. A New Surface Flow Management Tool. Bryan V. Butler Manager, Multiphase Systems. Email: bryan.butler@weatherford.com. 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+%.

paulos
Download Presentation

Wet Compression

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Wet Compression A New Surface Flow Management Tool Bryan V. Butler Manager, Multiphase Systems Email: bryan.butler@weatherford.com

  2. 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+%

  3. Types of Wet Compressors • Positive Displacement • Twin Screw • Mass Transfer • RamPump™ System

  4. Wet Compression Twin Screw Multiphase Pump • Liquids help compress gas • Liquids control slip flow

  5. Wet Compression Mass Transfer Pump • Linear Displacement Compression • Liquids help efficiency

  6. Wet Compression RamPump™ System Operates similar to: • Linear Displacement Compression • No liquid requirement

  7. Wet Compression Installation – Field Piping LIQUID TRAP (IF NEEDED) DISCHARGE WET COMPRESSOR SKID SUCTION

  8. Wet Compression Installation – Field Piping • 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

  9. Wet Compression Installation - Controls • Downstream Pressure: Determined by downstream conditions • Inlet Pressure: Determined by pump rate Rate Control Methods: RamPump System Twin Screw & Mass Transfer Pumps • Hydraulic (100% - 0%) • 4-20 ma signal from pressure/level Xducer • Throttle (Manually Set) • VFDs for Electric Drive (100% -30%) • Throttle Controls - Engine Drive • Automatic Recirculation Controls • Transmissions or Belts & Pulleys • May need PLC

  10. MSCFPD = 0.1986 x BPDe x (p+14.7)/(t + 460) Where p = psig; t = deg F Wet Compression Flow Ratings • 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:

  11. Mass Transfer Ram Pump Twin Screw • Higher Hyd. Press. • Stronger Hsg Wall • Volumetric Effic. • Higher Rod Loads • Casing and Rotors • Seal System • Slip Flow Increases • Cylinder Walls • Volumetric Effic. Wet Compression Compression Ratios and Operating Pressures Pumps affected different ways: Mass Flow Rate is Affected by Compression Ratio

  12. Cr = 18.2 Hi-Vol Low Press. Low Vol. Hi-Press. Surge Vessel Cr = 5.9 Cr = 3.1 250 psig 30 psig 800 psig Wet Compression High Compression Ratios – Staged Installation

  13. Bryan V. Butler 11909 Spencer Rd. (FM 529) Houston, Tx. 77041 USA Manager, Multiphase Systems Main: 713 983-5000 Direct: 713 983-5223 Fax: 713 983-5040 Mobile 281 705-6228 Email: bryan.butler@weatherford.com Thank you for your attention

More Related