The second round interview was a large group interview with several recruiters. It started late on the first day and ended incredibly late. We were given topics before the interview to present on, and we were asked questions after we had our presentation. We were then asked questions about the topic, so don't put any information on the presentation that you can't answer. We only had several hours of sleep between the two days. On the second day, we went to an example job site. After we got back to the hotel, we had closing interviews, but I believe they already had made up their mind. The closing interview was probably meant for those they were on the fence about. The second day ended with a dinner party. We spent most of the second day riding in a bus and talking to non-recruiting Schlumberger employees, so the first day is the most important day in making a good impressions.