Pros
Stress on Safety of employees, Very process oriented, they follow Halliburton Management System (HMS) for everything and HMS is extremely good system compiled by some of the best in the industry. Safety awareness and training opportunities in plenty. Domain knowledge and expertise is easily accessible, you can have your questions answered by best in the industry and can gain from their knowledge. Opportunities to grow are easily available. All employee dealings with HR will be on SAP and it is very systematic.
Cons
You must know that they are looking for the best of the best, though they may not hire the best. Your communication skills, written language, temperament, personality, social bonding, technical knowledge, endurance everything will be put to the test. Introverts will find it very difficult to grow infact they may perish soon. Join them if you have a go-getter attitude. Otherwise stay away, it will scar you for life. Payscales are lower than their competitors.