Applied Technology Workshop Twin Screw Multiphase Pump. Ove Jahnsen 08 February 2005

Transcription

1 Applied Technology Workshop Twin Screw Multiphase Pump Ove Jahnsen 08 February 2005

2 Introduction SUBSEA MULTIPHASE TWIN SCREW PUMPS MultiBooster A part of AkerKvaerner's Subsea Integral Product Line Main Stream of Kvaerner Oilfield Products Operations. The most common technology for onshore & offshore pumping of hydrocarbons in a multiphase flow 27-Feb-05 Page 2

3 Why Seabed boosting? Enhanced production - Wellhead pressure draw-down - Increased discharge pressure Low pressure reservoirs (Extend life of old ones) 27-Feb-05 Page 3

4 Twin Screw - Simple Pumping Principle Positive displacement by use of twin-screws Moving compartments arranged between two inter-meshing screws 27-Feb-05 Page 4

5 Demo 2000 Subsea Pilot Project - Program Objective: Subsea Pilot Installation : Phase 1 Demo 2000 Multiphase pump development MultiBooster TM - Engineering/design/construction, testing (FAT) and water tank testing with Hydrocarbons at Kårstø gas and condensate terminal Phase 2 Screening Screening of suitable field locations and selection of pilot site for the MultiBooster Phase 3 Balmoral Installation Phase 3.1; Upgrade and testing of unit to chosen site Phase 3.2; Engineering, Procurement, Construction, Installation and Operation of Pump System 27-Feb-05 Page 5

6 MultiBooster Program What did it take to get there? A Champion (asset) with An application Added Value Finances Manageable Risk Learn to walk before you start running Sponsors Somebody to share cost That can see the incentives Access to operational data A convincing program Partner must believe you can do it Realistic schedule and budgets Technical Assurance 27-Feb-05 Page 6

7 Balmoral MultiBooster Project Multibooster installed in spare slot on exisiting Balmoral Template Tie-in to exisiting 4 well Manifold on Balmoral Additional tie-in to test header 1100 m 3 /h, 18 bar, GVF 77% 27-Feb-05 Page 7

8 Pump Arrangement VSD & Control Container HPU Container Umbilical Wet Mate HV Connector Control Pod Valve Base 27-Feb-05 Page 8

9 icon SEM with Condition Monitoring- Qualified Technology Topside equipment PC Power supply PolyManager Modem 9600baud VAC icon SEM Subsea Pump Modem Serial interface board Data acquisition board ICP interface Bearing mounted accelerometers Processor 4-20mA 4-20mA temperature sensors PSU Analogue input board Temperature transmitters PT1000 Motor winding temperature sensors 27-Feb-05 Page 9

10 Technical Assurance through testing Graphic User Interface - LabView Balmoral test: GVF 0-100% 0-10 bar suction pressure 20 bar differential 1200 m 3 /h 27-Feb-05 Page 10

11 Interfaces Verified by Stack up Test 27-Feb-05 Page 11

12 Subsea Twin-screw Multiphase Pump Sucessfully qualified through Sub-component testing Barrier fluid System Test Lubrication and cooling System Tests Control & Monitoring System Tests HV Wet Mateable Connector Qualification Power & Umbilical System Tests Complete Integrated System Testing by Pumping water Pumping air and water mixture Pumping live condensate and gas mixture (Demo 2000) 27-Feb-05 Page 12

13 Next step is Deep Water Issue Challenge Status Pressure rating Effect on Qualification needed: - shut-in ( psi) Housing, seals Housing - external (4 500 psi) Electrical hook-up High voltage & power wet-mate connector Water depth Installation and Methods available hook-up Flow Base Valves, connectors, seals Equipment available Control and Monitoring Umbilical Low voltage equipment Weight and dynamic effects System and sensors available. Vibration sensors need qualification Adapting known solutions Pressure compensation housing that allows for installation down to 3000 meter and shut in pressure up to psi 27-Feb-05 Page 13

14 Group Questions What will it take to have assets recognize this as added value technology? Psychological Barriers have they been reduced in the last years? 27-Feb-05 Page 14