Force majeure clauses are now the most widely used contract provisions, protecting parties if part of the contract cannot be performed owing to some extraordinary event, outside the control of the contracting parties. These boilerplate provisions, which are routinely incorporated in commercial contracts, can be used as an effective tool for controlling potential risks that may in the future affect the smooth performance of a contractual arrangement. Depending on the needs of contracting parties, as well as the requirements of a particular branch of industry, such a clause may take different forms. Based on current contract practice, this article seeks to address some critical issues related to the inclusion of force majeure clauses in long-term international petroleum contracts. In the same way, the structure of a force majeure clause and the legal and practical issues that should be taken into account in the course of drafting will be discussed.