Applied online for an REMS(Electrical) position. Got a call, almost a month later setting up a phone interview. The interview was in most part, going through my resume and my knowledge of schlumberger and their process, a few behavioral questions were put forth, as well. Asked to expect result in a couple of weeks or so.
Three weeks down, I get a phone call from one of their technology centers scheduling an onsite interview. Was asked to prepare an 8-min technical presentation on a thesis/internship/academic/previous work of choice. On the day of interview, I was given a presentation about the tech center and the expectation/benefits of schlumberger life, followed by a 1 hour extensive tour of the facility. Once this was done, the whole group (7-8 mem) sat down to interview me. The questions spanned everything from resume-based, to behavioral, to technical. But through out the interview, the team made sure that there was a cordial atmosphere and I was not being stressed out. Was finally told to expect an on-site field interview as well.
The second onsite (Field) interview was at Oklahoma. 2-day process. A few site visits followed by a team building activity that involved building a color-water pump. Was told that inputs from both the onsite teams would be evaluated before a final decision was taken.
Overall, a good research of the company and the interview process, asking good questions during the site visits, and adequate preparation for the presentation/technical part would be a good way forward.
The offer finally arrived in July, with the first initial application submitted online in march. Mine was a bit time consuming since I had to attend two different onsite interviews and the teams had to send in their assessment.