Room 342
Session 32: Projects
Moderators: Hisham Saadawi, ADCO, Abu Dhabi; Trevor Munk, Chevron
This session will discuss managing offshore megaprojects, calculation of erosion to thermoplastic, and lining technology. |
0830 |
166363 |
Development of a Compact Topsides Processing Plant
R. Mikkelsen, FMC Technologies; D. Carrijo de Melo, Petrobras |
0855 |
166149 |
Mitigation Techniques of Acoustic Induced Vibration (AIV) Effect For Blowdown Piping System
A.M. Moussa, Burullus Gas |
0920 |
166310 |
Managing Offshore Megaprojects—Success is an Option
G.H. Sterling, Consultant |
0945 |
166423 |
Calculation of Erosion of Velocity Due to Liquid Droplet with Application to Oil and Gas Industry Production
H. Arabnejad, S.A. Shirazi, B.S. McLaury, J.R. Shadley, University of Tulsa |
1040 |
166118 |
Design of a Cyclonic Solids Jetting Device and Slurry Transport System for Production Systems
C.H. Rawlins, eProcess Technologies |
1105 |
166388 |
Deciding Whether to Fund Either CCS or CCUS Offshore Projects: Are We Comparing Apples and Pears in the North Sea?
R. Harrison, Senergy Limited; G. Falcone, TU Clausthal |
1130 |
166424 |
Prevention of Pulsations Caused By Flexible Risers
S. Belfroid, J. Golliard, H. Korst, TNO Energy |
ePosters |
|
166454 |
A Simplified Slug Flow Model for Highly Viscous Oil-Gas Flow in Horizontal Pipes
R. Brito, E. Pereyra, C. Sarica, C. Torres, The University of Tulsa |
|
166080 |
A Modern Approach to Optimizing Underground Natural Gas Storage
M.J. Economides, University of Houston; X. Wang, XGas |
Room 238 and 239
Session 33: Data-Driven Predictive Analytics
Moderators: Keith Killian, ExxonMobil; Luigi Saputelli, Frontender
Presentations in this session will include discussions on application of data-driven modeling, data mining and predictive analytics research and development, and practices in upstream oil and gas operations. |
0830 |
166313 |
Identification of Horizontal Well Placement Using Fuzzy Logic
A.S. Popa, Chevron |
0855 |
166111 |
Data Driven Analytics in Powder River Basin, WY
M. Maysami, R. Gaskari, S.D. Mohaghegh, Intelligent Solutions |
0920 |
166137 |
Using Big Data and Smart Field Technology for Detecting Leakage in a CO2 Storage Projects
S.A. Haghighat, S.D. Mohaghegh, V. Gholami, A. Shahkarami, D.A. Moreno, West Virginia University |
0945 |
166472 |
Causal Analysis and Data Mining of Well Stimulation Data Using Classification and Regression Tree with Enhancements
S. Bhattacharya, M. Maucec, J.M. Yarus, D.D. Fulton, J.M. Orth, A. Singh, Halliburton |
1040 |
166449 |
New Approach to identify Analogue Reservoirs
H. Rodriguez, E. Escobar, S. Embid, N. Rodriguez, M. Hegazy, Repsol; L. Lake, The University of Texas at Austin |
1105 |
166304 |
A Framework-Oriented Approach for Determining Attribute Importance When Building Effective Predictive Models for Oil and Gas Data Analytics
S. Dursun, K. Rangarajan, A. Singh, Halliburton |
1130 |
166240 |
Using Data-Driven Analytics to Assess the Impact of Design Parameters on Production from Shale
S. Esmaili, S.D. Mohaghegh, West Virginia University |
Room 255, 256, and 257
Session 34: Coil Tubing and Well Operations in Production
Session Chairpersons: Bertrand Theuveny, Schlumberger; Jeff Chang, Florida Chemical
Intervention in live production wells can be planned efficiently and safely. The number of tools available to remediate well problems is rapidly increasing. A new, exciting set of activities can solve problems and save wells from early death. Discover how we can diagnose and cure traditional problems encountered in a wide range of applications from sand clean-out to setting resins in wellbore. |
0830 |
166496 |
The Growth of Coiled Tubing and the Benefits of Thinking Small Again
A. Terry, B. Pate, R. Stanley, Baker Hughes |
0855 |
166531 |
Case History: Sand Handling and Hydrocarbon Containment During a Coiled Tubing Cleanout of a Live Deepwater Well
T. Peruzzi, Murphy Oil; E. Gagen, R. Reynolds, Schlumberge; L. Cunningham, Murphy Oil |
0920 |
166207 |
Engineering Analysis of Coiled Tubing Failure in a Gas Well with Hydrate Plugging
S. Hamid, Sanjel |
0945 |
166401 |
Industry Trends Utilizing Larger Diameter Coiled Tubing for Extended Reach Operations in Northwestern Canada
L. Edillon, STEP Energy Services |
1040 |
166337 |
New Water Depth Record for Electric Line Operations, Retrieving Asphaltenes with Riserless Light Well Intervention
S. Ashcraft, Anadarko; O. Karlsen, A.E. Luviano, B. Morrison, Welltec |
1105 |
166418 |
Identifying Small Leaks with Ultrasonic Leak Detection-Lessons Learned in Alaska
J. Julian, BP; A. Duerr, ASD; J. Jackson, University of Alaska; J. Johns, Archer |
1130 |
166077 |
Large Scale Jet Pump Performance Optimization in a Viscous Oil Field
M.K. Singh, D. Prasad, A. Singh, M. Jha, R. Tandon, Cairn India Ltd. |
ePosters |
| |
166374 |
Experimental Study of Liquid Viscosity Effect on Two-Phase Stage Performance of Electrical Submersible Pumps
H.M. Banjar, J.A. Gamboa, H. Zhang, University of Tulsa |
| |
166301 |
Video Production Logging and Polymer Gel Yields Successful Water Isolation in the Fayetteville Shale
J.W. Brady, Devon; D.Shattuck, Southwestern Energy; M.H. Parker, Swift Energy; C.S. Sramek, EV Downhole Video; A. Jones, Occidential Petroleum; J. Gould, Baker Hughes |
Room 244 and 245
Session 35: Completion Systems and Techniques
Session Chairpersons: Mark Glaser, Weatherford; Evan Graybill, Chevron
This session presents a variety of applications of completion and workover technology. Topics include technological advances in wellbore equipment, case studies of completion installation practices, and novel techniques that improve well completions. |
0830 |
166330 |
Flow Analysis: A Critical Step in Completion Design and Optimization: A Case Study of Multizone Completion Designs
E.J. Pogoson, A.H. Cardona, Baker Hughes |
0855 |
166217 |
Integrating Completion and Drilling Techniques to Improve and Maximize Production Over the Life of the Well
G. Scott, L.M. Smith, Alaskan Energy Resources; A. Johnston, Alaska Oilfield Consultants |
0920 |
166182 |
Radio Frequency Identification (RFID) Leads the Way in the Quest for Intervention Free Upper Completion Installation
I.A. Adan, Weatherford |
0945 |
166379 |
A Case History: The Installation of a System to Restore Full Safety Valve Functionality to a Malaysia Offshore Well with Damaged Control Line
M. Aminuddin, B. Norhafifi, A. Izura, k. Hazrina, N. Nordin, M. Faizal, S. Setiawan, Y. Yuzmanizeil, F. Brian, Petronas; S. Sharp, I. Afrizal, M. Zafarol, Weatherford |
1040 |
166368 |
Design, Installation, and Initial Performance of Ultra-High-Rate Gas Deepwater Completions—Tamar Field, Offshore Israel
J.C. Healy, J.R. Sanford, K.J. Dufrene, J.N. Fink, D.F. Reeves, T. Hopper, Noble Energy |
1105 |
166382 |
The State-of-the-Art Completion Technological Innovation: The First 25,000-psi 500oF Permanent Bridge Plug
A. Ruffo, G. Deng, J.C. Doane, G. Anderson, D.J. Lehr, S.D. Collins, Baker Hughes |
1130 |
166145 |
Stress Redistribution Analysis in Multiple Eccentric Packers During Completion Operations
Y. Zhang, University of Houston; R. Samuel, Halliburton |
Room E3
Session 36: Drilling Automation
Session Chairpersons: Mario Zamora, Schlumberger; Fred Florence, National Oilwell Varco
Drilling automation uses surface and downhole sensors connected to rig controls via computerized applications to improve safety and performance and minimize non-productive time. This session looks at the latest automation activities including new telemetry techniques, autonomous downhole tools, and key security issues. It features a report on an industry joint project, and a keynote speaker who challenges the oil and gas participants to match automation progress in other industries. |
0830 |
166071 |
Self-Adapting Bottom Hole Assembly Vibration Suppression
M. Hutchinson, D. Burgess, F. Thompson, A. Kopfstein, APS Technology |
0855 |
166215 |
Unique Acoustic Telemetry Network With Distributed Pressure Measurement Nodes Enables Accurate Real-Time Analysis of Sweep Effectiveness
M. Reeves, D.G. Smith, D. Groves, XACT Downhole Telemetry; A. Brehm, S.A. Rovira, K. Armagost, Anadarko |
0920 |
166263 |
Drilling Systems Automation: Current State, Initiatives and Potential Impact
J.D. Macpherson, Baker Hughes; J.P. de Wardt, DE WARDT and CO.; F. Florence, National Oilwell Varco; C.D. Chapman, Schlumberger; M. Zamora, M-I SWACO; M.L. Laing, SAS; F. Iversen, IRIS |
0945 |
Invited Speaker |
Wildcatting the Solar System: Drilling and Sampling Other Worlds
Dr. Michael New, Astrobiology Discipline Scientist, NASA |
1040 |
166165 |
Downhole Steering Automation and New Survey Measurement Method Significantly Improves High-Dogleg Rotary-Steerable System Performance
J. Sugiura, A. Bowler, R. Hawkins, S. Jones, P. Hornblower; Schlumberger |
1105 |
166116 |
A Dynamic Imaging Particle Analysis System for Real-Time Analysis of Drilling Muds
L. Brown, M. Duplisea, S. Bowen, Fluid Imaging Technologies |
1130 |
166428 |
Closed Loop Automation of Downhole Weight on Bit Improves Sliding Performance and Reduces Conservatism in Unconventional Horizontal Well Development
T. Pink, W.L. Koederitz, A. Barrie, National Oilwell Varco; D. Bert, D. Overgaard, Chesapeake |
ePoster |
| |
166163 |
Successfully Exploration Drilling in a Very Narrow Mud Weight Window with a Crossflow Using Automated Managed Pressure Drilling: Control Technology and High Quality MPD Engineering, A Case History in Mexico East
J. Rodriguez, A. Dominguez, S. Villalobos, Pemex; M.A. Chavarria, J.A. Morales, J.C. Beltran, C.A. Ruiz, J. Rojas, Schlumberger |
Room E2
Session 37: Innovations of Conductivity
Session Chairpersons: James Strain, Bear Creek Engineering; John Lassek, Schlumberger
Conductivity of created hydraulic fractures is a critical factor in stimulation design for conventional and unconventional reservoirs. This session explores innovations in new proppant materials, reducing environmental impact, and effective proppant selections in fracture design. Papers presented in this session are a balance of sound laboratory work and real world case studies demonstrating the impact of these techniques. |
0830 |
166323 |
Development and Field Testing of Advanced Ceramic Proppants
M.G. Mack, C. Coker, Oxane Materials |
0855 |
166251 |
Environmental Stewardship: Global Applications of a Non-Radioactive Method to Identify Proppant Placement and Propped Fracture Height
R.J. Duenckel, T.T. Palisch, X. Han, P.M. Saldungaray, Carbo Ceramics |
0920 |
166249 |
Methodological Approach for Optimization of Completion Practices in Mature Carbonate Fields
A. Babaniyazov, C.H. Jackson, ConocoPhillips |
0945 |
166096 |
Transport and Distribution of Proppants in Multistage Fractured Horizontal Wells - A CFD Simulation Approach
A.B. Bokane, S. Jain, Y.K. Deshpande, F. Crespo, Halliburton |
1040 |
166107 |
65 Years of Fracturing Experience: The Key to Better Productivity is Not What We Have Learned, But What We Have Forgotten and Failed to Utilize!
F.E. Syfan, GoFrac; T.T. Palisch, Carbo Ceramics; J. Dawson, Independence Oilfield Chemicals |
1105 |
166299 |
Hydraulic Fracture Design Flaws—Proppant Selection
M. Yang, M.J. Economides, University of Houston ; C. Wei, PetroChina; C. Gao, Plains Exploration and Production |
1130 |
166216 |
A New Standardized Laboratory Protocol to Study the Interaction of Organic-Rich Shales with Drilling and Fracturing Fluids
J. Zhou, C. Jung, J. Pedlow, M.E. Chenevert, M.M. Sharma, University of Texas At Austin |
ePosters |
|
166431 |
Unconventional Completions: Which is Right for Your Application?
W. Burton, Baker Hughes |
|
166474 |
Experimental Investigation of Propped Fracture Network Conductivity in Naturally Fractured Shale Reservoirs
Q. Wen, China University of Petroleum; X. Jin, S.N. Shah, University of Oklahoma; Y, Li, China University of Petroleum |
Room 243
Session 38: Innovative Technologies for Advanced Reservoir Descriptions
Session Chairpersons: Paul Mckay, ION Geophysical; Olatunji Akinwunmi, Total
Reservoir description is at the core of the oil industry and it requires the constant development of innovative technologies as reservoirs become more complex and poorly understood, like unconventionals. The session offers a series of presentations of highly innovative technologies aimed at describing highly complex reservoirs along with their field applications. |
0830 |
166234 |
Experimental Investigation of Water Saturation Effects on Barnett Shale's Geomechanical Behaviors
S. Lin, B. Lai, University of Louisiana |
0855 |
166356 |
Predicting Formation Pressures from Passive Magnetotelluric Technology
A. Lopez Manriquez, Delgac |
0920 |
166370 |
Geomechanics of Hydraulic Fracturing Inferred From Composite Radiation Patterns of Microseismicity
J.T. Rutledge, R.C. Downie, S.C. Maxwell, J.E. Drew, Schlumberger |
0945 |
166485 |
A New Model for Geomechanical Seismicity Based Reservoir Characterization Including Reservoir Discontinuity Orientations
S. Hosseini, F. Aminzadeh, The University of Southern California |
1040 |
166178 |
Geological Attributes from Conventional Well Logs: Relating Rock Types to Depositional Facies in Deepwater Turbidite Reservoirs
C. Xu, C. Torres-Verdin, R. Steel, University of Texas at Austin |
1105 |
166446 |
Magnitude-Based Calibrated Discrete Fracture Network Methodology
J.P. McKenna, MicroSeismic |
1130 |
166463 |
Seismic Anisotropy Characterization in Heterogeneous Formations Using Borehole Sonic Data
J. Jocker, Schlumberger; M. Ferla, F. Pampuri, Eni, E. Wielemaker, Schlumberger |
ePoster |
|
166490 |
Crosswell Seismic Guided 3D Seismic Interpretation Results in Successful Infill Well Location in Bunyu Field (Indonesia)
A. Syarif, Z. Irwanzah, T. Handayani, Pertamina; S. Dogra, Schlumberger |
Room 338 and 339
Session 39: Petrophysical Applications
Session Chairpersons:Badarinadh Vissapragada, Schlumberger; Annie Audibert-Hayet, Total
This session is devoted to novel petrophysical techniques and technologies to improve the determination of rock and fluid properties in conventional reservoirs and the integration of petrophysical data with those originated from other sources. |
0830 |
166180 |
Performance And Analysis Of A Borehole Gravity Log In An Alaska North Slope Grind and Inject Well
J.L. Brady, BP; M. Bill, ASRC Energy Services; C. Nind, Scintrex; H. Pfutzner, F. Legendre, Schlumberger; R. Doshier, Orbis Engineering; J. MacQueen, Micro-g LaCoste; L. Beyer, Petrotechnical |
0855 |
166082 |
Connate Water Saturation - Irreducible or Not: The Key to Reliable Hydraulic Rock Typing in Reservoirs Straddling Multiple Capillary Windows
C. Xu, C. Torres-Verdin, Q. Yang, .L. Diniz-Ferreira, University of Texas at Austin |
0920 |
166258 |
Correcting LWD Propagation Resistivity Logs in Horizontal Sinusoidal Wells for Better Water Saturation Estimate: Case Study in a Deepwater, Channelized Turbidite Reservoir
H. Wang, P. Garrow, P. Silva, Chevron |
0945 |
166121 |
Petrophysical and Geological Evaluation of Laminated Clastic Rocks Using Borehole Electrical Image and NMR Data Integration
H. Al-Khatib, K. Mirotchnik, J.H. Jonkers, Weatherford |
1040 |
166329 |
A Heavy Oil Mobility Quicklook Using Dielectric Measurements at Four Depths of Investigation
S.T. Grayson, J.L. Hemingway, Schlumberger |
1105 |
166154 |
Environmental and Transport Effects on Core Measurements of Water Saturation, Salinity, and Wettability, and Hydrocarbon Composition
S. Misra, C. Torres-Verdin, K. Sepehrnoori, University of Texas At Austin |
1130 |
166252 |
Predicting Porosity and Permeability of Carbonate Rocks from Core-Scale to Pore-Scale Using Medical CT, Confocal Laser Scanning Microscopy and Micro CT
S.M. Shah, J. Yang, J. Crawshaw, O. Gharbi, E. Boek, Imperial College London |
ePoster |
| |
166106 |
Microresistivity Image Inpainting and Visualization
S. Assous, J.A. Whetton, P.A. Elkington, Weatherford |
Room 344 and 345
Session 40: Fundamentals of Flow from Micro to Macro
Session Chairpersons: Nicholas Kalita, BG Group; George Petrosky, ConocoPhillips
Fundamental fluid flow processes at various scales are the focus of this session. On a smaller scale, the presenters focus on imaging, experimental, and theoretical research. The influence of small-scale phenomena such as sorption and transport at well and field level is also examined. The settings are highly varied and include classic oil and gas bearing shale, as well as the purely generic. |
0830 |
166498 |
Reservoir-Condition Pore-Scale Imaging of Supercritical Carbon Dioxide
M. Andrew, B. Bijeljic, M.J. Blunt, Imperial College |
0855 |
166324 |
Modeling Gas Flow Through Hydraulically-Fractured Shale-Gas Reservoirs Involving Molecular-To-Inertial Transport Regimes and Threshold-Pressure Gradient
F. Civan, University of Oklahoma |
0920 |
166173 |
A New Approach for the Simulation of Fluid Flow in Unconventional Reservoirs Through Multiple Permeability Modeling
B. Yan, M. Alfi, Y. Wang, J.E. Killough, Texas A&M University |
0945 |
166526 |
Experimental and Theoretical Study of Three-Phase Relative Permeability in Oil Reservoirs
H. Shahverdi, M. Sohrabi, Heriot-Watt University |
1040 |
166289 |
Asphaltene Deposition in Capillary Flow
C.M. Seifried, S. Al Lawati, J. Crawshaw, E. Boek, Imperial College London |
1105 |
166403 |
Potential of Improved Waterflooding in Acid-Hydraulically Fractured Shale Formations
S. Morsy, Texas Tech University; J.J. Sheng, A. Gomaa, Baker Hughes; M.Y. Soliman, Texas Tech University |
1130 |
166162 |
The Condition of Capillary Condensation and Its Effects on Adsorption Isotherms of Unconventional Gas Condensate Reservoirs
B. Li, J., Baker Hughes; A. Mehmani, J. Chen, University of Texas at Austin; D.T. Georgi, G. Jin, Baker Hughes |
ePosters |
|
166375 |
Experimental and Numerical Analysis of Gas Transport in Shale Including the Role of Sorption
K.R. Alnoaimi, A.R. Kovscek, Stanford University |
Room 252, 253, and 254
Session 41: Reservoir Engineering Applied to Unconventional Reservoirs
Session Chairpersons: Raymond Ambrose, Hilcorp Energy; Christopher Clarkson, University of Calgary
This session consists of seven papers and three posters that focus on the reservoir engineering aspects of unconventional reservoirs. With the ever increasing number of wells and completions in these types of reservoirs, their importance is increasing. Topics in this session include liquids, geomechanics, decline curve analysis, and reserves estimations are discussed. |
0830 |
166380 |
Optimized Well Modeling of Liquid-Rich Shale Reservoirs
A. Juell, C.H. Whitson, Norwegian University of Science and Tech |
0855 |
166177 |
Completion and Production Strategies for Liquids-Rich Wells in Ultra-Low-Permeability Reservoirs
A. Kumar, R.G. Dusterhoft, S. Siddiqui, Halliburton |
0920 |
166377 |
Density-Based Rate-Time Production Analysis of Unconventional Gas Reservoirs Under Gas Slippage and Desorption
P. Vardcharragosad, L.F. Ayala, Pennsylvania State University |
0945 |
166152 |
Diagnosing Pressure-Dependent-Permeability in Long-Term Shale Gas Pressure and Production Transient Analysis
F. Vera, C.A. Ehlig-Economides, Texas A&M University |
1040 |
166201 |
Geo-mechanics Coupled Reservoir Flow Simulation for Diagnostic Fracture Injection Test Design and Interpretation in Shale Reservoirs
A.S. Padmaker, Chevron |
1105 |
166365 |
Comparison of Decline Curve Analysis Methods with Analytical Models in Unconventional Plays
M. Meyet R. Dutta, C. Burns |
1130 |
166214 |
A New Method for Modeling Multi-Phase Flowback of Multi-Fractured Horizontal Tight Oil Wells to Determine Hydraulic Fracture Properties
C.R. Clarkson, University of Calgary; J. Williams-kovacs, TAQA North |
ePosters |
|
166279 |
Estimation of Effective Fracture Volume Using Water Flowback and Production Data for Shale Gas Reservoirs
A.B. Alkouh, Texas A&M University; S. McKetta, Southwestern Energy; R.A. Wattenbarger, Texas A&M University |
| |
166334 |
An Experimental Study of Cyclic Gas Injection to Improve Shale Oil Recovery
T.D. Gamadi, J.J. Sheng, M.Y. Soliman, Texas Tech University |
Room 343
Session 42: Downhole Tools and Drilling Dynamics
Session Chairpersons: Robello Samuel, Halliburton Fellow; Xianping Wu, Shell
Drilling dynamic dysfunctions continue to be a hot topic of research in new tools and techniques. You will hear about new insights gained through high frequency measurements and modeling, as well as field results of application of the latest technology to mitigate the effects of vibrations. Casing drilling continues to expand as highlighted by a study here, as well as other innovations in logging and reaming tools. Innovations in PDC bits, motors, and use of a fluid hammer to manage axial and tortional energy at the bit will be highlighted. |
0830 |
166212 |
New Insights into Drilling Dynamics Through High Frequency Vibration Measurement and Modeling
H. Oueslati, J.R. Jain, H. Reckmann, L.W. Ledgerwood, R. Pessier, Baker Hughes; S. Chandrasekaran, TATA Consultancy |
0855 |
166445 |
Step Change Drilling Technology Modifies Drill String Dynamics and Results in Reduced Drilling Vibrations
M.J. Gaines, R. Morrison, D. Herrington, National Oilwell Varco |
0920 |
166127 |
Ream-on-Demand System Eliminates Dedicated Trip to Enlarge Rathole in Deepwater Gulf of Mexico Operation
N. Lirette, Noble Energy; M. Aubin, J. Davis, H. Duvvuru, M. Nagaraj, Schlumberger |
0945 |
Invited Speaker |
Large Bore Expandable Liner Hanger Provides Reliable, Cost-Effective Solution for Liner Placement in Critical Well Path (OTC 24169)
M.R. Johnson, Halliburton |
1040 |
166112 |
All in One for Casing While Drilling Technology: Numerical, Analytical, and Experimental Results and Field Observations
S. Salehi, University of Louisiana; M. Karimi, Weatherford; M. Stahri, University of Tulsa; A. Aladasan, Kuwait Oil; C. Ezeakacha, University of Louisiana |
1105 |
166465 |
Fully Rotating PDC Cutter Gaining Momentum: Conquering Frictional Heat in Hard/Abrasive Formations Improves Drilling Efficiency
Y. Zhang, Y. Burhan, C. Chen, S. Tammineni, B. Durairajan, S. Mathanagopalan, R. Ford, Smith Bits, a Schlumberger Company |
1130 |
166501 |
Deepwater Wells Top Hole Cement Volume Evaluation Using Innovative Hole Size inversion from LWD Propagation Resistivity Measurements
A.G. Peternell, M.I. Dooply, S. Leveque, G. Tovar, J. Horkowitz, Schlumberger |
ePoster |
|
166457 |
A New Approach for Build Rate Estimation of Downhole Motors
N. Marchand, M. Kalantari, National Oilwell Varco |
|
166433 |
Fluid Hammer Increases PDC Performance Through Axial and Torsional Energy at the Bit
S.W. Powell, D. Herrington, B. Botton, B. Ivie, National Oilwell Varco |
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