Thermo-Hydraulic Model of a Twin-Screw Multiphase Pump

2004 ◽  
Author(s):  
Celso Y. Nakashima ◽  
Silvio Oliveira ◽  
Elisio F. Caetano
Keyword(s):  
Hydraulic Model ◽  
Production Costs ◽  
Temperature Profiles ◽  
Mass Balances ◽  
Multiphase Pump ◽  
Gas Compression ◽  
Twin Screw ◽  
Absorbed Power ◽  
Heavy Fractions ◽  
Fluid Separation

The twin-screw multiphase pump has been studied as an alternative equipment to substitute the conventional system (fluid separation, liquid pumping and gas compression) in petroleum boosting. By “pumping” gas and liquid together, the multiphase pump could reduce production costs, particularly in deepwater activity. This paper presents a thermo-hydraulic model of a twin-screw multiphase pump developed to determine important parameters such as: volumetric efficiency, absorbed power, discharge conditions, heat transfer and pressure and temperature profiles. The continuous movement from suction to the discharge of pump chambers is divided in small discretive steps. This division allows the calculation of energy and mass balances for each screw chamber. At each step, it is possible to calculate mass and energy that enters and leaves one chamber. With this balance, pressure and temperature for the next step can be calculated. Differently from previous model, it considers not only water-air but also hydrocarbon mixtures (including petroleum heavy fractions) as working fluids. Besides, inclusion of screw rotation influence over peripheral backflow is not neglected as in previous models.

Thermodynamic Model of a Twin-Screw Multiphase Pump

2002 ◽  
Author(s):  
Celso Yukio Nakashima ◽  
Silvio de Oliveira Ju´nior ◽  
Elisio F. Caetano
Keyword(s):  
Turbulent Flow ◽  
Thermodynamic Model ◽  
Production Costs ◽  
Complex Flow ◽  
Multiphase Pump ◽  
Operation Conditions ◽  
Gas Compression ◽  
Twin Screw ◽  
Absorbed Power ◽  
Flow Through

The twin-screw multiphase pump has been studied as an alternative system to substitute the conventional one (fluid separation, liquid pumping and gas compression) in petroleum boosting. By “pumping” simultaneously gas and liquid, the multiphase pump could reduce production costs in deepwater activities. This paper presents a thermodynamic model of a twin-screw multiphase pump to determine performance parameters such as: absorbed power, discharge conditions and efficiency. To overcome problems with the complex flow field inside of this novel equipment, the multiphase flow was divided into a sequence of simpler processes. Such approach helps determine energy and mass balances and enables the use of a process simulator (Hysys.Process v2.1) to construct the model. The model prediction when compared to the literature show that the assumption of a smooth turbulent flow, considering the pressure loss in the entrance and discharge of the gap, fits better the phenomena than the turbulent flow when calculating the flow through the gaps. In addition, the comparison for absorbed power indicates that the assumption of gaps filled only with liquid is not valid under all operation conditions.

scholarly journals SUBSEA MULTIPHASE PUMPING SYSTEM X GAS LIFT: AN EXERGO-ECONOMIC COMPARISON

2004 ◽  
Vol 3 (2) ◽  
Author(s):  
C. Y. Nakashima ◽  
S. Oliveira Jr. ◽  
E. F. Caetano
Keyword(s):  
Offshore Platform ◽  
Production Costs ◽  
Pump System ◽  
Operational Conditions ◽  
Multiphase Pump ◽  
Pumping System ◽  
Artificial Lift ◽  
Study Results ◽  
Twin Screw ◽  
Gas Lift

This paper presents a methodology for an exergetic comparison between two artificial lift systems: a gas lift and a twin-screw multiphase pump system, and a standalone offshore platform. A software (Hysys.Process v2.1) was used to simulate an offshore platform with the artificial lift methods and calculate all properties (including exergy) of the material and energy streams. The twin-screw multiphase pump behavior was simulated with a thermodynamic model developed recently (NAKASHIMA (2000) and NAKASHIMA, OLIVEIRA and CAETANO (2002)). The operational conditions of the PETROBRAS 7- MRL-72D-RJS well operating with cited systems were predicted by an internal study conducted in PETROBRAS (BARUZZI et al. (2001a) and partially published in BARUZZI et al. (2001b)). The comparisons cover the range of 2000 to 2020, the same range adopted in the study. Results show that in general the production costs are lower when the multiphase pump is used. The main advantages of this method over the gas lift is the absence of material (gas) recycle and a better energy management.

scholarly journals SUBSEA MULTIPHASE PUMPING SYSTEM X GAS LIFT: AN EXERGO-ECONOMIC COMPARISON

2004 ◽  
Vol 3 (2) ◽  
pp. 107 ◽  
Author(s):  
C. Y. Nakashima ◽  
S. Oliveira Jr. ◽  
E. F. Caetano
Keyword(s):  
Production Costs ◽  
Pump System ◽  
Operational Conditions ◽  
Multiphase Pump ◽  
Pumping System ◽  
Artificial Lift ◽  
Study Results ◽  
Twin Screw ◽  
Gas Lift ◽  
Economic Comparison

This paper presents a methodology for an exergetic comparison between two artificial lift systems: a gas lift and a twin-screw multiphase pump system, and a standalone offshore platform. A software (Hysys.Process v2.1) was used to simulate an offshore platform with the artificial lift methods and calculate all properties (including exergy) of the material and energy streams. The twin-screw multiphase pump behavior was simulated with a thermodynamic model developed recently (NAKASHIMA (2000) and NAKASHIMA, OLIVEIRA and CAETANO (2002)). The operational conditions of the PETROBRAS 7- MRL-72D-RJS well operating with cited systems were predicted by an internal study conducted in PETROBRAS (BARUZZI et al. (2001a) and partially published in BARUZZI et al. (2001b)). The comparisons cover the range of 2000 to 2020, the same range adopted in the study. Results show that in general the production costs are lower when the multiphase pump is used. The main advantages of this method over the gas lift is the absence of material (gas) recycle and a better energy management.

scholarly journals A Review on the Application of Multiphase Twin Screw Pump as a Downhole Wet Gas Compressor to Improve Gas Wells Recovery Factor

2021 ◽  
Vol 15 ◽  
pp. 223-232
Author(s):  
Sharul Sham Dol ◽  
Niraj Baxi ◽  
Mior Azman Meor Said
Keyword(s):  
Volume Fraction ◽  
Energy Industry ◽  
Gas Wells ◽  
Screw Pump ◽  
Research Activities ◽  
Wet Gas ◽  
Gas Compression ◽  
Twin Screw ◽  
Gas Volume Fraction ◽  
Gas Volume

By introducing a multiphase twin screw pump as an artificial lifting device inside the well tubing (downhole) for wet gas compression application; i.e. gas volume fraction (GVF) higher than 95%, the unproductive or commercially unattractive gas wells can be revived and made commercially productive once again. Above strategy provides energy industry with an invaluable option to significantly reduce greenhouse gas emissions by reviving gas production from already existing infrastructure thereby reducing new exploratory and development efforts. At the same time above strategy enables energy industry to meet society’s demand for affordable energy throughout the critical energy transition from predominantly fossil fuels based resources to hybrid energy system of renewables and gas. This paper summarizes the research activities related to the applications involving multiphase twin screw pump for gas volume fraction (GVF) higher than 95% and outlines the opportunity that this new frontier of multiphase fluid research provides. By developing an understanding and quantifying the factors that influence volumetric efficiency of the multiphase twin screw pump, the novel concept of productivity improvement by a downhole wet gas compression using above technology can be made practicable and commercially more attractive than other production improvement strategies available today. Review and evaluation of the results of mathematical and experimental models for multiphase twin screw pump for applications with GVF of more than 95% has provided valuable insights in to multiphase physics in the gap leakage domains of pump and this increases confidence that novel theoretical concept of downhole wet gas compression using multiphase twin screw pump that is described in this paper, is practically achievable through further research and improvements.

Numerical Investigation on a Twin-Screw Multiphase Pump Under low IGVF

2021 ◽  
Vol 14 (4) ◽  
pp. 335-344
Author(s):  
Shuaihui Sun ◽  
Pengbo Wu ◽  
Pengcheng Guo ◽  
Guangzhi Yi ◽  
Ahmed Kovacevic
Keyword(s):  
Numerical Investigation ◽  
Multiphase Pump ◽  
Twin Screw

The Kvaerner Multiphase Pump System for Deepwater Applications

2001 ◽  
Author(s):  
Ove F. Jahnsen ◽  
John Yardley ◽  
Geoff High ◽  
Brede Thorkilsen
Keyword(s):  
Development Program ◽  
Gas Content ◽  
Modular System ◽  
Pump System ◽  
Multiphase Pump ◽  
Current Test ◽  
System Solution ◽  
Twin Screw ◽  
The Individual ◽  
Pump Inlet

Abstract This paper describes Kvaerner’s prototype subsea multiphase pump system and the DEMO 2000 development program (current test completion date 2nd Q2001). Reference is also made to service proven sub-systems, components and subsea expertise incorporated into the pump module and system design. Availability and reliability consideration together with novel plans for the future is presented. The Subsea Multiphase Pump and motor are packaged into a modular system solution that is readily adaptable to template and manifold configurations and maximises the use of existing qualified components and sub-systems. A guidewireless system is adopted and Kvaerner’s design ensures self-alignment upon installation at simple flowbase interfaces, making it ideal for deepwater applications. Due to the individual 40 tonne weight, and moonpool dimensions, of both flow base and pump module, light monohull vessels can be utilised to execute installation and retrieval. The pump unit is Bornemann twin-screw design, service proven and modified for subsea use up to 2000-meter water depth, driven by an oil-filled Loher electric motor that provides efficient power with corresponding low weight. Some main pump features are flexible operation covering all gas-liquid ratios together with tolerance for slug flow and some sand. Of particular importance, compared to centrifugal pump designs, the twin-screw volumetric arrangement is able to maintain the pressure boost specification independent of gas content at the pump inlet, and without an upstream mixing tank.

Field Experience with the First Twin-Screw Multiphase Pump in a Saudi Arabia Oil Field

2013 ◽  
Author(s):  
Rayid S. Al-Anazi ◽  
Shaleh M. Al-Ajmi ◽  
Esshaq M. Al-Hasan ◽  
Mohammed H. Al-Buali
Keyword(s):  
Saudi Arabia ◽  
Field Experience ◽  
Oil Field ◽  
Multiphase Pump ◽  
Twin Screw

301 Twin-Screw Multiphase Pump Characteristics and Pressure Measurement on Casing Wall

2000 ◽  
Vol 005.2 (0) ◽  
pp. 69-70
Author(s):  
Akinori FURUKAWA ◽  
Hisasada TAKAHARA ◽  
Ken MATSUDA ◽  
Hidetsugu ODA
Keyword(s):  
Pressure Measurement ◽  
Multiphase Pump ◽  
Twin Screw
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