Copyright © Robello Samuel. All rights reserved.

Technical Papers:
Journal Papers:

• “Wellbore-Trajectory Control by Use of Minimum Well-Profile-Energy Criterion for Drilling Automation" Liu, Zhengchun,Robello Samuel,SPE 170861-PA SPE Journal Paper - 2015
• “Elastic Pipe Control and Compensation for Managed Pressure Drilling Under Sea Wave Heave Conditions” Robello Samuel and Randy Lovorn, J. Energy Resour. Technol 138(1), 012903 (Sep 16, 2015) (9 pages).
• “Analytical Model to Characterize “Smear Effect” Observed while Drilling with Casing , Aniket Kumar, Robello Samuel, Accepted for ASME. 2014.
• “Rate of Penetration Optimization Using the Shuffled Frog Leaping Algorithm (SFLA)” Ping Yi, Robello Samuel, Accepted for ASME. 2014.
• “Effect of Stabilized Nanofluids on Drilling Fluids for Unconventional Shales” Ponmani, Robello Samuel, Ponmani, S, William, JKM, Samuel, R, Nagarajan, R Sangwai, JSPE, 2014
• “Comprehensive Hydro-Mechanical Energy Calculations for Drilling”, Kshitij Mohan, Faraaz Adil, Robello Samuel, ASME- Journal of Energy Resources Technology –Accepted.
• ‘Formation and characterization of thermal and electrical properties of CuO and ZnO nanofluids in xanthan gum’, Ponmani, S, William, JKM, Samuel, R, Nagarajan, R Sangwai, JS 2014,Colloids and Surfaces A: Physicochemical and Engineering Aspects,443, 97-43.
• “Analytical Model to Estimate the Downhole Temperatures for Casing Drilling Operations” , Aniket Kumar, Robello Samuel, SPE 165934 Drilling and Completions Journal, June 2013.
• “Analytical Model to Estimate the Drag Forces for Micro-hole Coiled Tubing Drilling” Robello Samuel, ASME- Journal of Energy Resources Technology
• “Analytical Model to Estimate the Downhole Casing Wear using the Total Wellbore Energy” Aniket Kumar, Joseph Nwachukwa, Robello Samuel, ASME- Journal of Energy Resources Technology – Accepted
• “Modeling and Analysis of Drillstring Vibration in Riserless Environment” Robello Samuel, Journal of Energy Resources Technology, ASME Journal of Energy Resources Technology, JERT, March. 2012
• “Drillstring Vibration with Hole-Enlarging Tools: Analysis and Avoidance.” Robello Samuel and Dongping Yao, Accepted for ASME, Journal of Energy Resources Technology.
• “Friction Factors-What are they for Torque, Drag, Vibration, Drill Ahead, Transient Swab/Surge Analysis” JSPE, Vol 73, Issues 3-4 July 2010
• “Simplified Model for Expansion and Contraction of Slotted Tubulars” Zifeng Li, Dongping Yao, Robello Samuel, JSPE, Vol 72, Issues 3-4 June 2010
• “ A New Wellpath Design Using Clothoid Spiral (Curvature Bridging) for Ultra-Extended Reach Drilling” Robello Samuel, SPEDJ, Vol 25, Number 3, September 2010
• “Surge and Drag Analysis for Extended Reach Casing and Casing Flotation Operations with centralizers: A Design Challenge? G.Robello Samuel, Colin Mason, SPE 101080, Annual Technical Conference, 2007.
• “How Good is the Torque-Drag Model?” Robert F. Mitchell, Robello Samuel, SPE105068, SPEJ-2009.
• "Annular-Pressure-Loss Predictions for Various Standoff Devices" Dongping Yao, G.Robello Samuel, accepted for SPEDC.
• “ An Innovative Ultradeepwater Subsea Blowout Preventer Control System Using Shape Memory Alloy Actuators” Gangbing Song, Ziping Hu, Kai Sun, Ning Ma, Michael Economides, Robello Samuel, Christine Economides, ASME JERT 33101-3 September, 2008.
• “Analysis of Downhole Energy Harvesting Positive Displacement Motor” ASME, Journal of Energy Resources Technology, ASME Journal of Energy Resources Technology, JERT-05-1084, Dec. 2007, VOl.129.
• “Progressing Cavity Pump (PCP): New Performance Equations for Optimal Design” G.Robello Samuel, Ken Saveth, ASME, Journal of Energy Resources Technology, Dec. 2006, Vol.128. pp 275-279.
• “Effect of Stress Concentration Factors due to Corrosion for Production Tubing Design”, Kai Sun University of Houston, Robello Samuel, SPE 90094, SPE Journal of Production and Facilities, Nov. 2005.
• “Field Validation of Transient Swab/Surge Response with PWD Data”
Robello G. Samuel, Ashwin Sunthankar, Glenn McColpin, Peter Bern,BP, and Timothy Flynn, Halliburton, SPE 85109, SPE Drilling and Completion Journal Dec 2003.
• "Performance of Positive Displacement Motor (PDM) Operating on Air," Robello Samuel, Stefan Miska, University of Tulsa, ASME, Journal Energy Resource Technology June 2003.
• “A Practical Technique to Estimate the Formation Thickness of a Kicking Zone.” G. Robello Samuel, Thomas Engler, Stefan Miska, ASME Journal of Energy Resources Technology,  March 2002 Vol 124, Issue 1 pp 1-7.
• “Evaluation and Prediction of The Performance of Positive Displacement Motor (PDM)” J.Li, Hong Xu, G.Robello Samuel, CIM 98-104, Journal of Canadian Petroleum Technology, August 2000.
• “Modeling of Pressure Buildup in A Kicking Well and Its Practical Application.” Stefan Miska, G. Robello Samuel, Azar, J.J; SPE 52884, SPE Drilling and Completion Journal, Dec 1998.

Conference Papers:

• "Casing Integrity: Strain-Based Fatigue Life Estimation Coupled with Numerical Thermal-Flow Simulation and Multi-String Stress Analysis" Zhengchun Liu, Robello Samuel, Adolfo Gonzales, and Yongfeng Kang, SPE 178448,SPE Thermal Well Integrity and Design Symposium held in Banff, Alberta, Canada, 23–25 November 2015.
• "Heat Transfer Modeling of Wellbore with Vacuum-Insulated-Tubing (VIT)" Yongfeng Kang, Robello Samuel, Adolfo Gonzales,Zhengchun Liu,SPE 178449,SPE Thermal Well Integrity and Design Symposium held in Banff, Alberta, Canada, 23–25 November 2015.
• "Swab and Surge Pressures with Reservoir Fluid Influx Condition during MPD" Robello Samuel, Randy Lovorn, IADC/SPE-178881, IADC/SPE Drilling Conference and Exhibition held in Fort Worth, Texas, USA, 1–3 March 2016.
• “Mitigating Vibration Induced Drillstring Failures Using Data Analytics: Workflow and Case Study” Ankit Mirani,Robello Samuel, IADC/SPE-178849, IADC/SPE Drilling Conference and Exhibition held in Fort Worth, Texas, USA, 1–3 March 2016.
• “Optimization of Rate of Penetration in a Convoluted Drilling Framework using Ant Colony Optimization” Wanyi Jiang, Robello Samuel, IADC/SPE-178847, IADC/SPE Drilling Conference and Exhibition held in Fort Worth, Texas, USA, 1–3 March 2016.
• “Solving the Casing Wear Puzzle Using Stiff String Model" Robello Samuel, Aniket Kumar and Adolfo Gonzales, IADC/SPE-178833, IADC/SPE Drilling Conference and Exhibition held in Fort Worth, Texas, USA, 1–3 March 2016.
• “Casing Integrity: Modeling Strength Degradation" Changning Li, and Robello Samuel, Halliburton IADC/SPE-178791, IADC/SPE Drilling Conference and Exhibition held in Fort Worth, Texas, USA, 1–3 March 2016.
• “Analytical Model to Estimate the Directional Tendency of Point and Push-the-Bit BHAs"Yuan Zhang Robello Samuel, SPE 174798, SPE Annual Technical Conference and Exhibition held in Houston, Texas, USA, 28–30 September 2015.
• Vibration Modeling and Analysis Under Backreaming Condition" SPE 174797,Robello Samuel, Halliburton; Ankit Mirani,SPE Annual Technical Conference and Exhibition held in Houston, Texas, USA, 28–30 September 2015.
• Well Integrity Management: Forecasting CO2 Cavity Corrosion on Tubing of Gas Wells" SPE 174883, Malik Alsalman, Zoha Nasizadeh, and Masoud M. Hosseini,Robello Samuel, SPE Annual Technical Conference and Exhibition held in Houston, Texas, USA, 28–30 September 2015.
• Optimized Centralizer Placement for Pre-Salt Formation" Robello Samuel, HanYi Wang, OTC 26092, Offshore Technology Conference Brasil held in Rio de Janeiro, Brazil, 27–29 October 2015.
• "A Novel Integrated Wellbore Energy Model for Horizontal and Complex Wells ", Kumar Anand, Ankit Mirani, Robello Samuel, SPE 177958, SPE International Conference and Exhibition, Abu Dhab, November 2015.
• "Well Integrity as Performance Metrics in Deepwater Drilling", Robello Samuel, Bibek Das, OTC-25766-MS, Offshore Technology Conference, 04-07 May, Houston, Texas, May 2015.
• "New drill pipe reduces body wear during shale drilling",Aniket Kumar, Robello Samuel, Halliburton; Scott Granger, Vallourec, Wolrd Oil, March 2015.
• “Tubular Integrity: Analytical Approach and Modeling of Optimum Performance Envelope in Presence of Gas Hydrates” Kumar Dinkar Anand, Robello Samuel, OTC Arctic Technology Conference, 23-25 March, Copenhagen, Denmark
• “Research Examines Eagle Ford UCS” Hossein Emadi, Robello Samuel, January 2015, The American Oil & Gas Reporter.
• Modeling Method to Analyze the Effect of Dynamic Cuttings Loading on the 3-D Underbalanced Drilling Envelop, SPE-174013 Western Regional Meeting held in Garden Grove, California, USA, 27–30 April 2015.
• “Blowout Well Flow Simulation for Deep-water Drilling Using High-pressure/high Temperature (HP/HT) Black Oil Viscosity Model” Zhengchun Liu, Robello Samuel, Adolfo Gonzales, and Yongfeng Kang, SPE/IADC-173074, SPE/IADC Drilling Conference and Exhibition held in London, United Kingdom, 17–19 March 2015.
• “Elastic Pipe Control and Compensation for Managed Pressure Drilling Under Sea Wave Heave Conditions” Robello Samuel and Randy Lovorn, SPE/IADC-173005, SPE/IADC Drilling Conference and Exhibition held in London, United Kingdom, 17–19 March 2015.
• “Downhole Automation Using Spline, Catenary, and Clothoid Curves Based On Minimum Wellpath Energy” Ping Yi, University of Houston; Robello Samuel, SPE/IADC-173096, SPE/IADC Drilling Conference and Exhibition held in London, United Kingdom, 17–19 March 2015.
• “Casing Wear Factors: How do They Improve Well Integrity Analyses?” Aniket Kumar and Robello Samuel, SPE/IADC-173053, SPE/IADC Drilling Conference and Exhibition held in London, United Kingdom, 17–19 March 2015.
• “Drilling Modeling and Simulation: Current State and Future Goals ”Junichi Sugiura, Robello Samuel, Joachim Oppelt, Geoff Downton, and G. P. Ostermeyer, SPE/IADC-173045, SPE/IADC Drilling Conference and Exhibition held in London, United Kingdom, 17–19 March 2015.
• A Model for Well Reliability Analysis throughout the Life of a Well Using Barrier Engineering and Performance, Bibek Das, Robello Samuel – SPE 170355 SPE/IADC Drilling Conference and Exhibition held in London, United Kingdom, 17–19 March 2015.
• “Discrete Vibration Stability Analysis with Coupled Drilling and Bit Parameters” Ankit Mirani, Robello Samuel, 2015, ASME, OAME conference, Canada.
• “Wellbore Placement” 2015, ASME, OAME conference, Canada.
• Well Integrity, 2015, ASME, OAME conference, Canada.
• “Visualization Informed Drilling: Optimization and Automation on-the-fly at the Bit” Robello Samuel, Umesh Nalmada, Aniket Kumar, 2014 AAPG Hedberg Research Conference, June 2014, Houston.
• “Wellbore Trajectory Control Using Minimum Well Profile Energy Criterion for Drilling Automation” Zhenchun Liu, Robello Samuel – ATCE 2014
• “Reliability Informed  Drilling: analysis for a Dual Gradient Drillling System” Bibek Das, Robello Samuel – ATCE 2014
• “Effects of Temperature on the Compressive strength of Eagle Ford Oil shale Rock – An experimental Study”  Hossein Emadi, Mohamed Soliman, Robello Samuel, Malgorzata Ziaja, Rozbeh B. Moghaddam – ATCE 2014
• “Simultaneous Fracturing and Drilling” Eurasia Oil & Gas, March 26, 2014
• “Geomechanical Modeling of Wellbore Stability in Anisotropic Salt Formations”, HanYi Wang, Robello Samuel, SPE 166250-MS, LACPC, 2014.
• “Optimization of for PDC Cutter Wear”, Michael Liu, Chris Marland, Robello Samuel, SPE 166250-MS, LACPC, 2014.
• “The Effect of Temperature on the Compressive Strength of Eagle Ford Oil Shale Rock An Experimental Study” Hossein Emadi, Mohamed Soliman, Robello Samuel, Malgorzata Ziaja, Rozbeh B. Moghaddam, IADC 2014.

• “Improved Model for Tapered Casing Design under Pressure Testing” Robello Samuel, Zhenying Wang, and Adolfo Gonzales, IADC 2014.
• “Analytical Model to Estimate the Casing Wear Due to Vibrational Impacts of the Drill String” Robello Samuel, Aniket Kumar IADC 2014.
• “ Real-time Rate of Penetration Optimization Using the Shuffled Frog Leaping Algorithm (SFLA)” Ping Yi, Robello Samuel, Intelligent Energy Conference, Netherlands, 2014.
• Effect of Stabilized of Stabilized Nanofluids on Water Based Drilling Fluids For Deepwater HPHT Wells” P.Swaminathan, J.K.M.William, R.Samuel, R. Nagarajan, J.Sangwai, International Symposium of Fusion Technology in Oil and Gas Development, South Korea, Jan.2014.
• “Stress Redistribution Analysis in the Eccentric Multiple Packers during Completion Operation” , Yuan Zhang, Robello Samuel, SPE 166145, ATCE 2013, New Orleans.
• “Geomechanical Modeling of Wellbore Stability in Salt Formations”, HanYi Wang, Robello Samuel, SPE 166144, ATCE 2013, New Orleans.
• “Experimental Study of the Swelling Properties of Unconventional Sale Oil and the Effects if Invasion on compressive Strength” , Hossein Emadi, Mohamed Soliman, Robello Samuel, SPE 166250, ATCE 2013, New Orleans.
• “Analytical Model to Characterize “Smear Effect” Observed while Drilling with Casing , Aniket Kumar, Robello Samuel, SPE 163486 to be presented in the 2013 SPE/IADC Conference, Amsterdam, Netherlands.
• “Analytical Model to Estimate the Drag Forces for Micro-hole Coiled Tubing Drilling” , Yuan Zhang, Ye Hao, Robello Samuel, SPE 163480 to be presented in the 2013 SPE/IADC Conference, Amsterdam, Netherlands.
• “Analytical Model to Estimate the Downhole Temperatures for Casing Drilling Operations” , Aniket Kumar, Robello Samuel, SPE 159278 to be presented in the 2012 SPE Annual Technical Conference, San Antonio, Texas.
• “Position/Fracture Uncertainty and Ranging During Drilling and Fracturing” Robello Samuel and Olivier Germain, Rui Gang, SPE 159721 to be presented in the 2012 SPE Annual Technical Conference, San Antonio, Texas.
• “Analytical Model to Estimate the Downhole Casing Wear using the Total Wellbore Energy” Robello Samuel, to be presented in the 2012 LACPAC Conference, Mexico City.
• “Field Application of an Analytical Model for Estimating the Downhole Temperatures Owing to Wellbore Friction” Aniket Kumar and Ajay Pratap Singh, Robello Samuel,  2012 SPE/IADC Asia Pacific Conference, Tianjin, China.
• “Vibration Analysis in Riserless Conditions” Robello Samuel, 2012 SPE/IADC Conference, San Diego.
• “Analytical Model to Predict the Effect of Pipe friction on Downhole Temperatures for Extended Reach Drilling (ERD)” Aniket Kumar, Ajay Singh, Robello Samuel, 2012 SPE/IADC Conference, San Diego.
• “What are Effective and True Forces” Robello Samuel , Aniket Kumar, 2012 SPE/IADC Conference, San Diego.
• “Casing Run Analysis for Top Hole” Robello Samuel, John Gradishar, SPE 147189 ATCE conference, Denver, November, 2011. 
• “Tubular Failures in Riserless Environment” Robello Samuel, Rishi Adari, John Gradishar, Willie Iyoho, SPE 134512, IADC, Amsterdam, 2011. 
• “Vibration Analysis for Hole Enlarging Tools” Robello Samuel, SPE 134512, Annual Technical Conference, Florence Italy 2010. 
• “Amplifier/Booster Joint Positioning Framework Design for a High-Speed Wired Telemetry System in MWD/LWD Downhole Tool Environment” Sumit Rath, Robello Samuel, SPE 134504, Annual Technical Conference, Florence Italy 2010.
• “Friction Factors-What are they for Torque, Drag, Vibration, Drill Ahead, Transient Swab/Surge Analysis” SPE 128059, accepted for IADC/SPE conference, New Orleans 2010.
• “Catenary Well Profiles for Ultra-Extended Reach Wells” Xiushan Liu, Robello Samuel, SPE 124313, Annual Technical Conference, New Orleans 2009.
• “Effect of Eccentricity and Rotation on Annular Friction Pressure Losses with Stand-off Devices, Ajay Singh, Robello Samuel, SPE 124190, Annual Technical Conference, New Orleans 2009.
• “Wellbore Drilling Indices, Tortuosity, Torsion and Energy: What Do They have to Do with Wellpath Design?”Robello Samuel, SPE124710, Annual Technical Conference, New Orleans 2009.
• “Pipe Sticking Prediction and Avoidance Using Adaptive Fuzzy Logic Model” A.Murillo, J.Newman, Robello Samuel, SPE 120128, Production Operation Symposium, Oklahoma City, 2009.
• “Ultra Extended Reach Drilling (u-ERD: Tunnel in the Earth) - A New Wellpath Design”, Robello Samuel, SPE 119421, IADC Amsterdam 2008.
• “Tracking Drilling Efficiency Using Hydro-Mechanical Specific Energy”, Kshitij Mohan, Faraaz Adil, Robello Samuel, SPE 115714, IADC Amsterdam 2008.
• “Actual 3D Shape of Wellbore Trajectory: An Objective Description for Complex Steered Wells” Xisuhan Liu, Robello Samuel, SPE 115714, Annual Technical Conference, Denver 2008.
• "Annular-Pressure-Loss Predictions for Various Standoff Devices" Dongping Yao, G.Robello Samuel, IADC 2008 Conference.
• “Surge and Drag Analysis for Extended Reach Casing and Casing Flotation Operations with centralizers: A Design Challenge? G.Robello Samuel, Colin Mason, SPE 101080, Annual Technical Conference, 2007.
• “Modeling of Expandable Slotted Tubulars” Lif Zifeng, Dongping Yao, G.Robello Samuel, SPE 101080, Annual Technical Conference, 2007.
• “Robust Well Cost Estimation Using Support Vector Machine Model” Sandipan Laskar, Pradeep Buddaraju, G.Robello Samuel, SPE 106577, SPE Digital Energy Conference and Exhibition, Houston, April 2007.
• “How Good is the Torque-Drag Model?” Robert F. Mitchell, Robello Samuel, SPE105068, 2001 IADC/SPE conference in Netherlands, Feb. 2007.
• “Integral Centralizer Sub and Enhanced Torque and Drag Calculations Improve Casing Installation”,  Deep offshore Technology International Conference and Exhibition, Hank Rogers, Adil Bayramov, G.Robello Samuel
• “Vibration Analysis Model Prediction and Avoidance: A Case History” G.Robello Samuel, Gary Schottle, D.B.Gupta, SPE 102134, IADC India Conference, Mumbai, India, 2006.
• “Harvesting Wasted Energy Downhole” Robello Samuel, E&P Hart, February 2006.
• “Stuck Pipe Prediction and Avoidance: A Convolutional neural Network Approach” Sekhar Nagarakanti, Chakarpani Siruvuari, Robello Samuel, IADC 2006 conference.
• “Design and Performance Evaluation of an Ultradeepwater Subsea Blowout Preventor Control System Using Shape Memory Alloy Actuators Ning Ma, Ziping Hu, G.Robello Samuel, Christine A. Ehlig-Economides, Gangbing Song, SPE 101080, Annual Technical Conference, 2006.
• “An Innovative Ultra Deepwater Subsea Blowout Preventer (BOP) Control System Using Shape Memory Alloy Actuators” Gangbing Song, Ziping Hu, Kai Sun, Ning Ma, Michael Economides, Robello Samuel, Christine Economides, IADC 2006 Miami, Conference.
• “Tortuosity Factors for Highly Tortuous Wells: A Practical Approach” G.Robello Samuel, Kaiwan Bharucha, Yuejin Luo, SPE 92565, SPE IADC 2005 Conference, Amsterdam.
• “Effect of Stress Concentration Factors due to Corrosion for Production Tubing Design”, Kai Sun University of Houston, Robello Samuel, SPE 90094, SPE Annual Technical Conference, September 2004.
• “Accelerating Drilling Technology with eKnowledge Factory: A Changing Paradigm”, Robello Samuel, Glenn McColpin, SPE 90048, SPE Annual Technical Conference, September 2004.
• “The Effect of Hole Curvature on the Wellbore Pressure Loss Prediction for Highly Tortuous Ultradeep Wells” Robello Samuel, IADC/SPE 87183,  Dallas, March 2004
• “A simple practical approach provides a technique for calibrating tortuosity factors Yuejin Luo, BP, Kaiwan Bharucha, Robello Samuel, Faris Bajwa - Oil & Gas Journal, Sep 15, 2003.
• “Model accurately predicts intermediate casing-run surge pressure in Marlin SS-1 well” G. Robello Samuel, Faris Bajwa, John LeBlanc, Mark Franklin, Oil and Gas Journal, Aug. 26, 2002.
• “Multistring Casing Design for Deep Water and Ultra Deep HPHT Wells” G. Robello Samuel, Adolfo Gonzales, Scot Ellis, Issa Kalil Synopsis Journal of Petroleum Technology May 2002.
• “Method Optimizes hydraulics with PDM and bit” G. Robello Samuel, Glenn McColpin, Oil & Gas Journal, Apr.8 2002.
• “A Study of Surge Pressure Analysis while Running 13 5/8 Inch Casing in Marlin SS-1”John LeBlanc, Mark Franklin, Faris Bajwa, G. Robello Samuel” Wellconnected May 2002
• “Dynamic Swab-Surge model: Validation/field examples” G. Robello Samuel, Glenn McColpin, Peter Bern, World Oil December 2001.
• “Multistring Casing Design for Deep Water and Ultra Deep HPHT Wells” G. Robello Samuel, Adolfo Gonzales, Scot Ellis, Issa Kalil SPE74490, SPE 2002 IADC Conference.
• “Wellbore Hydraulic Optimization with Downhole Motor and Bit” G. Robello Samuel, Glenn McColpin SPE72320, IADC/SPE Middle East Drilling Technology Conference, 2001.
• “Method Characterizes Well While Drilling” G. Robello Samuel, Stefan Miska; American Oil & Gas Reporter January 2001.
• “Field Validation of Swab/Surge Pressure Response with PWD data” G.Robello Samuel, Ashwin Suntharkar, Peter Bern, Tim Flynn. SPE67717, 2001 IADC/SPE conference in Netherlands.
• “Be Dynamic-Surge Analysis” Peter Bern,” Robello Samuel WellConnected, January 2001.
• “Wellhead Growth Index aids in Casing Design” Robello Samuel, Adolfo Gonzales, Oil and Gas Journal, Oct.30, 2000.
• “Multistring-Casing Design Optimization with Wellhead Growth” G.Robello Samuel, Adolfo Gonzales, Journal of Petroleum Technology May 2000.
• “WellPlan-Hydraulics Improvement” G.Robello Samuel, Peter Bern, WellConnected, April 2000.
• “Design Modification and Analysis of Downhole Motor for Underbalanced Drilling” G. Robello Samuel, Stefan Miska; SPE/ICoTA Conference Houston, April 2000.
• “Formation Characterization of A Horizontal Well While Drilling: An On-site Tool” G. Robello Samuel, Stefan Miska; SPE59129, IADC/SPE Conference New Orleans, March 2000.
• “Analytical Study of the Performance of Positive Displacement Motor (PDM): Modeling for Compressible Fluid” G. Robello Samuel, Stefan Miska; ASME/OAME 2000 Conference, New Orleans, March 2000.
• “Optimization of Multistring Casing Design with Wellhead Growth” G.Robello Samuel, Adolfo Gonzales, SPE56762. SPE Annual Conference, Houston, October 1999.
• “Rubbing Forces Provide Insights into PDM Wear Analysis” G.Robello Samuel, Stefan Miska, Oil and Gas Journal, Apr.19, 1999.
• “Optimization of Drilling Parameters with the Performance of Multilobe Positive Displacement Motor (PDM)” G.Robello Samuel, Stefan Miska, IADC/SPE 47791 IADC/SPE Jakarta, Sept.1998, Eastern Regional SPE meeting, Pittsburgh, Nov.1998 and Mid-continent SPE Symposium March 1999.
• “Evaluation and Prediction of The Performance of Positive Displacement Motor (PDM)” J.Li, Hong Xu, G.Robello Samuel, SPE 50408 SPE/CIM-Horizontal Well Conference, Calgary, Sept. 1998.
• “Performance Index provide engineers tool to select PDM and track performance” G.Robello Samuel, Stefan Miska and Jeff Li, Oil and Gas Journal, Aug.31, 1998.
• “Progressing Cavity Pump (PCP): New Performance Equations for Optimal Design” G.Robello Samuel, Ken Saveth, SPE 39786, SPE- Permian Basin Conference, Midland, March 1998.
• “Short-Radius Laterals: An Operator’s Experience” Journal of Petroleum Technology, July 1997.
• “Analytical Study of the Performance of Positive Displacement Motor (PDM): Modeling for Incompressible Fluid” G. Robello Samuel, Stefan Miska; SPE 39026 SPE – LACPEC, 1997.  Brazil.
• “Drilling Ultra Short Radius Dual Lateral Wells in Oklahoma - An Operator’s Experience”, Charles Ellis, G. Robello Samuel. SPE 37493-Production Operations Symposium, Oklahoma, 1997.
• “A Practical Technique to Estimate the Formation Thickness in a Kicking Well.” G. Robello Samuel, Stefan Miska; SPE 37472-Production Operations Symposium Oklahoma, 1997.
• “The Experimental Investigation of Thermal Insulation on a Diesel Engine Liner.”  G. Robello Samuel, ASME - Energy Week Conference at Houston. January 1997.
• “An Approach to the Design and Selection of Different Slim Downhole Motors for Coiled Tubing Drilling.” Alfredo Sanchez, G. Robello Samuel, Philip Johnson; SPE 37054 - 2nd International Three-Day Conference and Exhibition on Horizontal Well Technology, Calgary, Canada, Nov. 18-20, 1996
• “Modeling of Pressure Buildup in A Kicking Well and Its Practical Application.” Stefan Miska, G. Robello Samuel, Azar, J.J; SPE 35245 - Permian Basin Conference, Midland, 1996.
• “Percussion Drilling. Is It A lost Technique?... A Review.” G. Robello Samuel; SPE 35240- Permian Basin Conference, Midland, 1996.
Reports:
• “Performance Modeling of Positive Displacement Motor (PDM)” Tulsa University Drilling Research Projects (TUDRP) -Advisory Board Meeting Report, Nov.1995, May 1996, Nov. 1997, May 1997, Nov. 1997.
• “Advanced Horizontal Coiled Tubing Drilling System” Stefan Miska, G. Robello Samuel, Weiyong Qiu; U.S. Department of Energy, Annual Report; 1996, 1997.
• “Modeling and Design of High Performance Positive Displacement Motor” RFFP submitted to Gas Research Institute, Chicago, 1996.
• “Comprehensive Program for Sizing Electrical Submersible Pump”,  G. Robello Samuel, Report, Tulsa University Artificial Lift Projects. May, 1995.
• “Advanced Horizontal Coiled Tubing Drilling System” Stefan Miska, G. Robello Samuel, Weiyong Qiu, Sanchez A, Azouz I, Johnson P; U.S. Department of Energy, Annual Report. 1995
• “Change Over of Production Casing from 7.5” to 5” for Cauvery Basin Onland Wells” G. Robello Samuel, S.V.S.H.S. Raju; Report. ONGC (India), 1992.