1) Can you describe the process how of crude oil is made below the earth surface? 2) Define Porosity-Permeability, there relationship and how will it effect economics of oil extraction. 3) One diagram of Wireline cable stuck at the sensor, asked me to explain the tension on the cable and how it will break. 4) Asked why we use fluid when we do milling or lathe-machine job while cutting metals and then tried to ask, if we drill a hole in earth , how will this concept work. HR type: 1) Why Schlumberger?...told him that its the biggest in term of market-cap and technology. 2) Any experience is oil-rigs?.........no experience. 3) Will you survive the manual-work done at rig and explain how, from some past experience.