The product is a lab manual titled “OU Mewborne Petroleum PE 4331 Drilling And Production Lab Manual Spring 2012” by Samuel O Osisanya. Used manual with work and answers handwritten for many of the questions. Binding is very good and all pages are intact. The cover shows sign of being used. Get old class work to help you pass! The manual is focused on the subject areas of Petroleum Engineering , specifically related to drilling and production.