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Numerical Modeling of Erosion in Dense Slurry Flows
Hojjati, Shahabedin (Research Institute of Energy and Resources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Republic of Korea) | Pouraria, Hassan (New Mexico State University, USA) | Jeon, Seokwon (Seoul National University, 1 Gwanak-ro, Gwanak-gu, Republic of Korea)
ABSTRACT: Dense slurries are often produced and transported in mining engineering. Handling such high-volume fraction particulate flows often results in high pressure drop and severe erosion damage in facilities. Underestimating the erosion damage may result in catastrophic health, safety and environmental problems. The present study aims at modeling erosion in dense slurries by using computational fluid dynamics simulation. We use dense discrete particle model which takes into account both particle-fluid and particle-particle interactions. Numerical modeling is first conducted for a slurry impingement test with available experimental data through which the accuracy of the model is validated. Then, CFD simulation is conducted for a flow loop transmitting slurry flow. A comparison of the obtained CFD results with measured erosion rate (R=96.05%, mean percentage error=11.24%) indicates a great potential of DDPM for modeling erosion in dense slurries. INTRODUCTION Dense slurries are encountered in several industrial sectors such as mining and petroleum engineering. High volume fraction of particles in such flow systems results in several issues such as high pressure drop, particle deposition and erosion, to name a few. Fluid handling facilities in such systems suffer from severe wear and underestimating the damage from erosion may result in catastrophic health, safety and environmental problems. Hence, the capability of predicting erosion damage in a quantitative manner is of paramount importance for designing such systems. Due to the importance of erosion in different industrial sectors, several studies were carried out to identify the influential factors affecting the severity of erosion. Besides, several models have been proposed to quantify the erosion damage (Arabnejad et al., 2015; Finnie, 1960; Oka et al., 2005; Zhang, 2006). Such erosion models are often used along with computational fluid dynamics (CFD) models to precisely predict the trajectory of particles and the erosion damage due to the interaction of particles and walls. Thus far, several researchers used CFD models to investigate the flow-field and erosion in different geometrical conditions (Chen et al., 2006; Darihaki et al., 2017; Pouraria et al., 2017). However, numerical modeling of erosion in dense slurries has been scarce. Furthermore, erosion prediction is often conducted using discrete particle model (DPM) in which the inter-particle collisions are totally neglected. Due to the low particle loading in most of processing systems such an assumption is generally valid. However, as the particle loading increases, the influence of suspended particles on the motion of carrier fluid and the inter-particle collisions becomes more important. In such cases, simplified models such as DPM cannot predict the flow fields. Hence, using more sophisticated methods are essential.
Thermoplastic Lined Tubing: A Cost-Effective and Uptime-Enhancing Solution to Prolong Well Run Life
Alisaee, M. K. (Petroleum Development Oman) | Al Hinai, M. I. (Petroleum Development Oman) | Al-Mandhari, S. (Petroleum Development Oman) | Al Riyami, S. Y. (Petroleum Development Oman) | Al Saadi, F. (Petroleum Development Oman) | Alhinai, G. (Petroleum Development Oman) | Al Busaidi, I. K. (Petroleum Development Oman) | Al Harthy, A. H. (Petroleum Development Oman) | Al Masfry, R. (Marjan Petroleum) | Al Suleimani, A. (Marjan Petroleum) | Al Riyami, H. (Marjan Petroleum)
Abstract Production deferment and its associated costs are one of the key challenges in Well Reservoir Formation Management (WRFM) environment especially as wells are aging and frequently failing prior to their expected well life span. This could happen due to various reasons and one of them is the tubing erosion/corrosion in artificially lifted wells such as PCP and ESP. Therefore, the idea of installing thermoplastic lined tubing came up as an attempt to prolong the completion run life and thus reduce oil deferment along with CAPEX and OPEX. Fields in South of Oman operate at harsh reservoir conditions. Wells are producing relatively heavy oil at high BSW and high sand content. In 2020, hoist intervened 31 times in two fields (A and B) with a total of 70 active PCP wells only. 74% of failures were attributed to hole in tubing and 60% of these had less than one year run life. These alarming statistics necessitated out-of-the-box thinking. Thermoplastic lined tubing came into a picture as a mean of reducing failures by minimizing the friction between tubing and pump rods. This new method was first piloted in PDO in four wells in field A. Despite being installed for over two years, none of the wells in pilot have failed till to date. Completion run life has increased by double and nearly triple in some cases and wells are still continuously operating successfully. This is a great achievement when it comes to deferment and cost reduction. In field A & B, each hoist intervention cost $100-150k, and deferment might last for 20-40 days before well restoration take place. Preliminary results showed a saving of three interventions per well within two years and an increase of well uptime. The successful results extended the current plan to full deployment that will include other artificial lift well types. Furthermore, more than 30 thermoplastics lined tubing installations are currently expected per year in different fields for different clusters in PDO. Thermoplastic lined tubing has not only proven to increase completion run life but also improve workovers cost and has element of energy saving due to reducing friction loss between pump rods and the internal of the tubing. This means less pump torque and less power consumption to lift the fluid to surface with an estimated power saving of 7-10%.
- Oceania > Papua New Guinea > Papuan Peninsula > Central Province > National Capital District > Petroleum Retention License 15 > P’nyang Field (0.98)
- Oceania > Papua New Guinea > Papuan Peninsula > Central Province > National Capital District > Petroleum Retention License 15 > Elk-Antelope Field (0.98)
- Oceania > Papua New Guinea > Papuan Peninsula > Central Province > National Capital District > Petroleum Retention License 15 > Angore Field (0.98)
- (9 more...)
Sucker Rod Guides and variants sucker rod body wear protection devices have been around for more than 60 years. Originally starting as a rod scraper or paddle, early devices applied to the rod body as a flat metal section, tac-welded to the sucker rod body, in effort to scrape paraffin from the tubing and distribute rod side-loading across the tubing wall. Fast forward 70 years, and guides have evolved primarily from thin metal sheets to plastics, over-molded directly to the sucker rod body. Polymeric materials are non-linear, meaning their performance and mechanical properties vary with relative humidity and temperature. Material wear rates are inversely related to mechanical properties.
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (21 more...)
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)