August 29, 2014

To whom it may concern:

Christopher Shero has worked as a summer intern under my direct supervision on the Market Research and Analysis Team at National Oilwell Varco from June 16 through August 29th 2014.

National Oilwell Varco is a leading supplier of drilling and completion technology to the global oil and gas industry. Our products range from the most advanced technologies found on offshore shelf and deepwater drilling rigs: floaters, jack-ups, and FPSOs. We make land rigs and all of the components used for drilling both conventional and unconventional wells, including surface equipment, downhole technology, tubulars, and pressure pumping equipment. We offer a wide range of completion and production technologies. NOV has a market cap of $35 billion and expected annual revenues of $19 billion. We have 61,000 employees in 880 locations throughout 62 countries. Shares of National Oilwell Varco are traded on the NYSE under the symbol NOV.

The Market Research & Analysis Team provides strategic analysis and forecasting services to our executive management team as well as other NOV decision makers throughout the world.

During his internship with us Chris produced a report detailing the outlook for oil and gas development in various shale basins throughout the world. This was no small task: the report included a detailed assessment of 20 basins in 6 different countries or regions, including the Bashenoff basin in Western Siberia, the Tarim, Sichuan, Junggar and Songliao basins in China, and the Karoo basin in South Africa, and all other significant prospects.

His report was particularly impressive because—with the exception of the Vaca Muerta formation in Argentina—there is not a lot of information available about any of these plays at this stage in their development. We plan to expand on Chris’s report as development continues and more information becomes available. The report will ultimately be used to formulate business development strategies and allocate resources and investments in those areas. Chris’s work has provided us with an excellent platform for that purpose.

I was most impressed by Chris’s initiative and self-reliance while working on the Shales Report. Once he understood the scope and objective of the project he dedicated himself to the work with a singularity of purpose and a focus that I think is rare in a person at only the beginning stages of his or her career. I was also impressed that when Chris needed additional information, resources or direction, he turned to the other members of the team rather than to me. I sensed that the team members immediately accepted him as a collaborator and a peer. This led me to the conclusion that Chris is equally comfortable working in a team environment or on his own.

In summary, Chris learns very quickly. He is dedicated and works extremely hard. He is very dependable and is fun to work with. His final semester at Texas A&M should be a breeze, and I am certain that he will be very successful at whatever he chooses to do.

Sincerely,

Tim TynanVice President: Market Research and AnalysisNational Oilwell Varco