I applied in-person. I interviewed at Halliburton (Mumbai) in Jan 2013
Interview
Submit CV to the Hiring manager.
They will call you in case if you have relevant experience & job openings are there.
Hiring process it bit slow hence it might take a bit time to get confirmation call.
Interview questions [1]
Question 1
For Oil & Gas they ask more of technical stuff related to your profile.
They check your willingness to travel as in operations side job profile you need to travel a lot.