Work through solved problems using Schaum's Study Guides.
Use the Library's free Interlibrary Loan service to request books, journal articles etc.
Books you can get from the shelves
Devereux, S. (1999). Drilling for oil & gas: a nontechnical guide. Tulsa, OK: PennWell. (General Collection: TN871.2 D477 1999)
Hyne, N. J. (2012). Nontechnical guide to petroleum geology, exploration, drilling, and production. Tulsa, OK: Penn Well Corp. (General Collection: TN870.5 H9624 2012) Also see ebook version below.
E-books