Performance of Multiphase Twin-Screw Pump During the Period of Wet-Gas Compression
- Abhay Patil (Texas A&M University) | Gerald Morrison (Texas A&M University)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- February 2018
- Document Type
- Journal Paper
- 68 - 72
- 2018.Society of Petroleum Engineers
- Wet gas compression, Empirical Study, Multiphase twin-screw pump, Cooling effect, Viscosity effect
- 9 in the last 30 days
- 248 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 12.00|
|SPE Non-Member Price:||USD 35.00|
Sealflush recirculation in twin-screw pumps is an important function because it serves the purpose of not only cooling the seal faces but also sealing the gas leakage from one cavity to another during the period of wet gas compression, which directly affects the pump performance. This study focuses on evaluating the effect of heat generation during the period of wet gas compression on the pump performance and potential mitigation measures to consequential issues for fixed flow rate of sealflush-fluid recirculation. A new design of twin-screw pump skid with an inbuilt closed-loop sealflush-circulation loop was tested for 150-, 200-, and 250-psi pressure differentials at 10-psi suction pressure. A sealflush flow of approximately 6% was maintained at an operating speed of 3,600 rev/min with 100% gas at the pump inlet. Pump performance was observed as the temperature rose from approximately 95°F to 180°F. Heat generation caused by gas compression significantly reduced the pump volumetric efficiency. Pump performance was characterized as a function of exhaust temperature for given pressure differentials. Effect of sealflush-fluid viscosity was investigated. Volumetric efficiency was found to decrease slightly with an increase in sealflush-fluid viscosity. Sealflush fluid was quenched to evaluate the effect of cooling. Cooling the sealflush fluid significantly affected the pump performance, reinstating the efficiency to near its optimal value.
|File Size||1 MB||Number of Pages||5|
Cereijo, M. and Mercedes, A. 2003. Multiphase Twin-Screw Pump Modeling for Oil and Gas Industry. Report. College Station: Texas A&M University.
Chan, E. 2006. Wet-Gas Compression in Twin-Screw Multiphase Pumps. Master’s thesis, Texas A&M University, College Station, Texas (December 2006).
Comstock, O. 2016. Natural Gas-Fired Electricity Generation Expected to Reach Record Level in 2016. US Energy Information Administration.
Dal Porto, D. F. 1997. Multiphase-Pump Field Trials Demonstrate Practical Applications for the Technology. SPE Prod & Fac 12 (3): 159–164. SPE-36590-PA. https://doi.org/10.2118/36590-PA.
Dolan, P. G., Goodridge, R. A., and Leggate, J. S. 1988. Development of a Twin-Screw Pump for Multiphase Duties. SPE Prod Eng 3 (4): 629–632. SPE-15881-PA. https://doi.org/10.2118/15881-PA.
Falcone, G. and Harrison, B. 2015. Subsea Gas Compression Increases Chance of Deepwater Development. Oil & Gas Journal 109 (10): 68–73.
Karge, V. 1988. Two-Spindle Screw Pumps for Handling Multiphase Mixtures. Reprint of Pumps Vacuum Pumps Compressors ’88. Dr. Harnisch Verlagsgesellschaft mbH, 14–20.
Kroupa, R. 2011. Investigation of a Multiphase Twin-Screw Pump Operating at High Gas-Volume Fractions. MS thesis, Texas A&M University, College Station, Texas (May 2011).
Landopoulos, E. G. 2014. Next-Generation Multiphase Pumps for Wet Gas Compression. Universal Journal of Aerodynamics 2: 35–42.
Martén, I. and Jiménez, D. 2015. Low Oil Prices Are Challenging Natural-Gas Markets. bcg. perspectives: The Boston Consulting Group.
Morrison, G. L., Patil, A., and Cihak, D. 2012. Evaluation of a Twin-Screw Pump for Use in High Gas-Volume Fraction Flows. Presented at the ASME Summer Meeting, Rio Grande, Puerto Rico, 8–12 July. https://doi.org/10.1115/FEDSM2012-72179.
Morrison, G., Pirouzpanah, S., Barrios, L. J. et al. 2014a. Performance Evaluation of a Multiphase Electric Submersible Pump. Presented at the Offshore Technology Conference, Houston, 5–8 May. OTC-25080-MS. https://doi.org/10.4043/25080-MS.
Morrison, G., Kroupa, R., Patil, A. et al. 2014b. Experimental Investigation of Wellhead Twin-Screw Pump for Gas-Well Deliquification. Oil and Gas Fac 3 (2). SPE-159910-PA. https://doi.org/10.2118/159910-PA.
Patil, A. 2013. Performance Evaluation and CFD Simulation of Multiphase Twin-Screw Pumps. Doctoral dissertation, Texas A&M University, College Station, Texas (May 2013).
Prang, A. J. 2004. Enhanced Multiphase Flow Predictions in Twin-Screw Pump. Proc., the 21st International Pump User Symposium, pp. 69–76. Houston: Texas A&M University.
Rabiger, K. 2009. Fluid Dynamic and Thermodynamic Behaviour of Multiphase Screw Pumps Handling Gas-Liquid Mixtures With Very High Gas Volume Fractions. PhD doctoral, Faculty of Advanced Technology, University of Glamorgan.
Singh, A. 2003. Modelling Twin-Screw Multiphase Pump Performance During Periods of High Gas Volume Fraction. Master’s thesis, Texas A&M University, College Station, Texas.
Vetter, G. W., Wolfgang, W., Korner, H. et al. 2000. Multiphase Pumping With Twin-Screw Pumps—Understand and Model Hydrodynamics and Hydroabrasive Wear. Presented at the 17th International Pump User Symposium, Turbomachinery Laboratory (pp. 153–169). Houston: Texas A&M University.