SLB Junior Field Engineer interview questions

Submitted an application online. Two weeks later, received a phone call for an HR interview scheduled for two days later. HR interview went well, ~45 minutes long, typical behavioural interview. Received a phone call the morning after for a manager interview, scheduled it for that afternoon. Manager interview lasted 5 minutes. Couldn't tell if it went extremely well or extremely bad, but I was expecting the interview process to end here. Received a phone call with offer the next morning.

Meet in regional HQ in Paris with a few other candidates. A mix of group exercise, building up the tallest structure with paper sheets... 1:1 interviews where you get the chance to be challenged and pushed to the limit; stay calm and keep articulating your case as this is to test your behavior under pressure. 2 parts: presentation of Schlumberger and presentation of candidates.