Developing activities or tasks in the oil industry, demands great knowledge and experience for their execution. However, contracting local non-specialized workforce has become a challenge in terms of risk prevention and control for those who are exposed and do not have experience and knowledge in workover and well service operations (WO/WS operations). Accidents have caused injuries, property damages and operative incidents. WO/WS operations accident rate represents 39% of the field's total, i.e., there is greater risk exposure thus activities are more critical.

A worker, who has been properly trained, is aware of the risks and knows what must be done in such regard. Research has shown that training is one of the most important factors in successful safety programs. The above confirms the relevance and importance of such training practices, which emphasize on the initial instruction and follow-up of workplace safety procedures.

The analysis in this paper is based on the need to have competent workers able to perform their activities, for which they must have specific knowledge, behaviors and skills related to their assignments. Achieving the above requires a systematic training, considered under a planned set-up process so that they can do their job in a safe manner, as well as the transfer of techniques that not only develop awareness, information and knowledge, but also how-to related skills through a "commitment that implies getting one's hands dirty, learning by doing and a guided practice".

The decision to look for alternatives aiming at strengthening knowledge and work best practices was made jointly with WO/WS contractor companies, betting on the optimization of the operations in terms of safety that would subsequently reduce the accident rate.

The skill strengthening strategy was first implemented in the last month of 2017 and was exclusively directed for key personnel of WO/WS operations.

This paper intends to analyze risk reduction in a population exposed to work accidents in the WO/WS operations for the following positions: supervisor, rig operator, derrick man and roughneck, for the period between 2014 and 2019, showing a considerable drop in occupational accident rate for the last year.

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