The development plan of Casabe field defined the drilling of producer wells with "S type" deviation geometry and cased hole completion with progressive cavity pump (PCP) systems because this plan offers the greatest advantages in wells with solids production. However, this combination creates an environment for repetitive failures due to severe friction between rod string and production tubing. A group of 40 wells with PCP was identified;these wells had three or more interventions per year. An extensive root cause analysis concluded that 44% of failures in wells with PCP were directly linked to tubing and rod wear, especially in highly deviated wells and high operating revoluetions per minute (RPM).

With the aim to increase the run life and decrease the intervention index of producer wells, a pilot test of new technologies such as the electric submersible PCP (ESPCP) were proposed; an ESPCP isa bottom-drive PCP that eliminates the rod string while maintaining the advantages of solids handling. These capabilities were expected to contribute to a significant increase in run life and, thus, have a direct impact on operating costs and production.

The first stage of a pilot test started in August 2012 with the installation of the ESPCP system in three wells. The results showed an outstanding increase of run life and savings of USD 3.6 million. By the end of 2016, 10 wells were producing with this system. This paper describes the implementation of the ESPCP system in Casabe field, the technical and economic advantages, and the lessons learnt.

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