Applied online and the interviewed on the phone once. Pretty easy and conversation based interview, took a couple weeks to get an offer/feedback. Once accepted you had to complete the hair and urine drug test. I had a great experience overall.

HR person of Schlumberger came to our university UET Lahore and interviewed top 10 students from each department Mechanical, Electrical and Petroleum. After interview they email the selected candidates. They selected 3 students from Mechanical, 4 from petroleum and no student from electrical. We have been informed the joining date and location of posting. My internship was in Islamabad yard area.

Interview consisted of three parts. First part was phone interview with the head of the research group which was mostly a casual conversation (what the group was doing and what the project would be). Second interview was technical, with the same person, asking general questions about the subject of my Ph.D research and technical questions. Third interview was with a recruiter and had personality questions.