| Transport of small cuttings in extended reach drilling M Duan, S Miska, M Yu, N Takach, R Ahmed, C Zettner SPE International Oil and Gas Conference and Exhibition in China, SPE-104192-MS, 2006 | 187 | 2006 |
| Critical conditions for effective sand-sized solids transport in horizontal and high-angle wells M Duan, S Miska, M Yu, N Takach, R Ahmed, C Zettner SPE Drilling & Completion 24 (02), 229-238, 2009 | 163 | 2009 |
| Vital role of nanopolymers in drilling and stimulations fluid applications S Singh, R Ahmed SPE Annual Technical Conference and Exhibition?, SPE-130413-MS, 2010 | 137 | 2010 |
| Hole cleaning and drilling fluid sweeps in horizontal and deviated wells: Comprehensive review H Mahmoud, A Hamza, MS Nasser, IA Hussein, R Ahmed, H Karami Journal of petroleum science and engineering 186, 106748, 2020 | 130 | 2020 |
| A mechanistic model to determine the critical flow velocity required to initiate the movement of spherical bed particles in inclined channels A Ramadan, P Skalle, ST Johansen Chemical Engineering Science 58 (10), 2153-2163, 2003 | 130 | 2003 |
| Review of elastomer seal assemblies in oil & gas wells: Performance evaluation, failure mechanisms, and gaps in industry standards H Patel, S Salehi, R Ahmed, C Teodoriu Journal of Petroleum Science and Engineering 179, 1046-1062, 2019 | 128 | 2019 |
| Experimental study and modeling of yield power-law fluid flow in annuli with drillpipe rotation R Ahmed, S Miska SPE/IADC Drilling Conference and Exhibition, SPE-112604-MS, 2008 | 126 | 2008 |
| Significance and complications of drilling fluid rheology in geothermal drilling: A review A Mohamed, S Salehi, R Ahmed Geothermics 93, 102066, 2021 | 118 | 2021 |
| Experimental study of MSE of a single PDC cutter interacting with rock under simulated pressurized conditions N Rafatian, S Miska, LWW Ledgerwood, R Ahmed, M Yu, N Takach SPE Drilling & Completion 25 (01), 10-18, 2010 | 116 | 2010 |
| Degradation of well cement in HPHT acidic environment: Effects of CO2 concentration and pressure O Omosebi, H Maheshwari, R Ahmed, S Shah, S Osisanya, S Hassani, ... Cement and Concrete Composites 74, 54-70, 2016 | 110 | 2016 |
| Surge-and-swab pressure predictions for yield-power-law drilling fluids F Crespo, R Ahmed, M Enfis, A Saasen, M Amani SPE Drilling & Completion 27 (04), 574-585, 2012 | 107 | 2012 |
| Effects of nanoparticles and temperature on heavy oil viscosity H Patel, S Shah, R Ahmed, S Ucan Journal of Petroleum Science and Engineering 167, 819-828, 2018 | 101 | 2018 |
| Modeling and experimental study of CO2 corrosion on carbon steel at elevated pressure and temperature R Elgaddafi, A Naidu, R Ahmed, S Shah, S Hassani, SO Osisanya, ... Journal of Natural Gas Science and Engineering 27, 1620-1629, 2015 | 94 | 2015 |
| Experimental study on cuttings transport with foam under simulated horizontal downhole conditions Z Chen, RM Ahmed, SZ Miska, NE Takach, M Yu, MB Pickell, J Hallman SPE/IADC Drilling Conference and Exhibition, SPE-99201-MS, 2006 | 87 | 2006 |
| Strength optimization of cementitious composites reinforced by carbon nanotubes and Titania nanoparticles MA Mousavi, A Sadeghi-Nik, A Bahari, C Jin, R Ahmed, T Ozbakkaloglu, ... Construction and Building Materials 303, 124510, 2021 | 86 | 2021 |
| Rheology of foamed cement RM Ahmed, NE Takach, UM Khan, S Taoutaou, S James, A Saasen, ... Cement and Concrete Research 39 (4), 353-361, 2009 | 86 | 2009 |
| Experimental study and modeling of cuttings transport using foam with drillpipe rotation M Duan, S Miska, M Yu, N Takach, R Ahmed, J Hallman SPE Drilling & completion 25 (03), 352-362, 2010 | 81 | 2010 |
| Application of a three-layer modeling approach for solids transport in horizontal and inclined channels A Ramadan, P Skalle, A Saasen Chemical engineering science 60 (10), 2557-2570, 2005 | 81 | 2005 |
| Settling behavior of spherical particles in fiber-containing drilling fluids R Elgaddafi, R Ahmed, M George, F Growcock Journal of Petroleum Science and Engineering 84, 20-28, 2012 | 78 | 2012 |
| The effect of drillstring rotation on equivalent circulation density: modeling and analysis of field measurements R Ahmed, M Enfis, H Miftah-El-Kheir, M Laget, A Saasen SPE Annual Technical Conference and Exhibition?, SPE-135587-MS, 2010 | 78 | 2010 |
Subhash Shahprofessor of petroleum engineeringبريد إلكتروني تم التحقق منه على ou.edu