Transfer PUMP & Texsteam Pump ELC - SWT 3/31/2023 PUMP S Contents: •Function •Types •Description •Selection •Safety •References ELC - SWT 3/31/2023 PUMP S PUMP S Lecture Objectives, by the end of this lecture, YOU should be able to: - Explain the functions of the SWT transfer pumps - Select a pump - List all safety aspects concerning pumps ELC - SWT 3/31/2023 •Transfer pumps are used to: PUMP S -Empty tank. -Re-inject oil into an existing production flowline. -Boost when there is insufficient pressure to achieve atomization at the burner ELC - SWT 3/31/2023 Transfer pumps types: PUMP S Positive Displacement or Centrifugal •Positive displacement pumps employ a moving piston, or a diaphragm, or a rotor (Rotary pump = gear or screw), to move a fixed volume of liquid per revolution of the pump. •Centrifugal pumps contains a central rotating wheel, the impeller, to impart high velocity to the liquid, and then converts to pressure. ELC - SWT 3/31/2023 Rotary pumps PUMP S •Gear type transfer pump (VIKING): An electric or diesel engine drives the rotor that drives the idler. ELC - SWT 3/31/2023 Rotary pumps •Screw type transfer pump (MOINEAU): -The rotor (external helix with a round cross-section) & rubber stator are the keys components. ELC - SWT 3/31/2023 PUMP S Rotary pumps PUMP S •Safety Relief Valve: -If the discharge line is blocked or closed, pressure builds up until the motor stalls. -To avoid a pump part or discharge line breaks, pumps are equipped with a SRV that prevents pressure buildup. ELC - SWT 3/31/2023 Centrifugal pumps PUMP S •Radial Flow (SUNDYNE): -Flow enters the center of the wheel and it is propelled radially to the outside. ELC - SWT 3/31/2023 Centrifugal pumps PUMP S •Axial Flow (GOULD = PMP-GA): -The impeller produces liquid velocity & the volute forces the liquid to discharge from the pump. ELC - SWT 3/31/2023 VIKING MOINEAU SUNDYNE PUMP SUNDYNE S Low flowrate Medium High flowrate High flowrate 2000 bbls/d flowrate 4000 8000 bbls/d 10000 bbls/d Electric 90 KW Electric 132 KW Old generation Transfer pumps used on Well Testing operations Transfer PUMPS Flowrate bbls/d Type of drive Diesel 15 hp Diesel 52 hp Start/Delta or Electric 13 or Electric 35 starter KW KW Service No H2S No H2S H2S H2S Type Volumetric Gear Volumetric Centrifuge Centrifuge Screw ELC - SWT device Safety 3/31/2023 Safety relief Safety relief By-pass By-pass Maxi. Pressure valve 250psi valve 300psi 415psi 415psi GOULD GOULD GOULD PUMP GOULD S Low flowrate Low flowrate Medium High flowrate 1600 bbls/d 2000 bbls/d flowrate 5000 10000 bbls/d New generation Transfer pumps used on Well Testing operations Transfer PUMPS Flowrate bbls/d Type of drive Electric Electric Electric Electric Power needed 37 KW 20 KW 37 KW 150 KW Service H2S H2S H2S H2S Type Centrifuge Centrifuge Centrifuge Centrifuge Safety device By-pass By-pass By-pass By-pass Maxi. Pressure 550psi 200psi 300psi 410psi Connection 3”602 F 3”602 F 3”602 F 3”602 F Inlet 3”602 M 3”602 M 3”602 M 3”602 M ELC - SWT 3/31/2023 Centrifugal pumps PUMP S •Bypass valve: -It allows some of the flow to be diverted, making it easier to start the pump and preventing pump overload. -It can be used also to control & adjust the flowrate by diverting some of the flow. ELC - SWT 3/31/2023 •Transfer pumps Selection: PUMP S -Pumping capacity required: continuous flowtest through tank empty tank after test only -Discharge pressure required. -Safety regulations (electrical or diesel). -H2S -Wellsite electrical supply ELC - SWT 3/31/2023 •Transfer pumps Selection (additional consideration): PUMP S -The 10,000 bbl/d pump requires a high current starting (200 A). P Ex: rig electricity supply is 380 V, 3 phases (watt) V3 x Volts Using the simplified formula I (Amp) = -The 10,000 bbl/d pump needs a heavy & expensive elec.cable. -If power is not available from the rig, a Generator is needed. ELC - SWT 3/31/2023 •Transfer pumps Safety: PUMP S -Electric pumps must be correctly grounded, cables, sockets must be in good condition & have a circuit breaker. -Rotate the pump shaft by hand to ensure it turns freely. -When starting the pump, make sure it turns in the correct direction. -Verify that the suction valve is open before starting the pump. Running the pump without fluid will destroy the pump. ELC - SWT 3/31/2023 •Transfer pumps Safety: PUMP S -Right after starting the pump, bleed off air or vapors that could be trapped in the pump. -If the pump does not deliver fluid at the discharge port within 30 seconds, stop it and verify starting procedure. -To ensure that the suction is flooded at all times, set the tank supplying at sufficient elevation above pump inlet. -A check valve must be mounted on the discharge line to prevent fluid from returning to the pump. ELC - SWT 3/31/2023 •Net Positive Suction Head (NPSH): PUMP S -It is the height of a column of liquid required at the suction port of a pump to produce a specific output pressure from the pump. ELC - SWT 3/31/2023 •Cavitation (insufficient NPSH) PUMP S -When the pump suction is under a low pressure / high vacuum condition, the pump will cavitate ----”The number 1 Pump Killer” ELC - SWT 3/31/2023 Positive displacement / Diaphragm (TEXSTEAM) PUMP S -Inject chemical under high pressure into the effluent, generally at Subsea,Flowhead, Flow lines, Choke manifold or inlet Separator. -It can be used also to pressure test surface equipment. ELC - SWT 3/31/2023 PUMP S •Texsteam pump: Chemical OUT Check valve Burst disc / SRV Bleed off valve (to eliminate air at start) Safety Relief Valve Grease fitting Piston Air supply (50psi) Pin Check valve IN Regulator Check valve OUT Air to lever (12psi) Master valve ELC - SWT 3/31/2023 Chemical IN Diaphragm •Texsteam pump: ELC - SWT 3/31/2023 PUMP S •Texsteam pump (model 5005) (Schlumberger PUMP model): ELC - SWT 3/31/2023 Plunger size ½” Max. discharge Press. 12,000 psi Maximum Volume Continuous: 85 GPD intermittent: 105 GPD Stroke length Long 1 ¼” Short ½” Max. air pressure 50 psi Strokes per minute Minimum: 5 Maximum, continuous: 60 Maximum, intermittent:75 S •Texsteam pump (model 5005): ELC - SWT 3/31/2023 PUMP S PUMP S References: . On Line Training . Animation “Texsteam” . InTouch: Technical Data Sheet & Maintenance manual ELC - SWT 3/31/2023 Transfer PUMP & Texsteam Pump ELC - SWT 3/31/2023 The End PUMP S
