The precision and the fast identification of abnormalities of bottom hole are essential to prevent damage and increase production in the oil industry. This article presents a study about a new automatic approach to the detection and the diagnosis of faults in the Sucker-rod Pumping through dynamometric cards of bottom hole. The main idea is the recognition of the well production status through the image processing of the bottom's hole dynamometric card (Boundary Descriptors) and Euclidean Distance. This proposal was implemented to oilfields cards of PETROBRAS with success.