This document develops the exploratory study that leads to establishing a state of knowledge about standardized BST. The central theme was categorized and subcategorized using the index method - validated by the ORCA research group in 2018 -, having as a guiding norm the generation by the American Petroleum Institute (API), and using as keys: the concept, the principles of operation, criteria and constructive characteristics, the classes, and the norms that govern the testers by displacement. The selected sources have as origin Manuals construction and calibration companies, Patents, industrial texts and academic theses. It is concluded that in future research on BST it is necessary to deepen the tests and calibrations for specific productive purposes.