ePAC™ II Variable Speed Drive (VSD) for Progressing Cavity Pumping (PCP)

The critical challenge in optimizing PCP wells is to match the rotational speed of the pump to the varying production capacity of the well while protecting the system from mechanical damage. Conventional VSDs cannot deliver full torque at low speeds resulting in inefficient production and stalled wells.

What is needed is infinitely variable speed control with controlled torque throughout the speed range.

Weatherford meets this need with the ePAC II PCP controller providing precision torque and speed control.

Drive reliability requires the proper enclosure to protect the sensitive electronics from foreign material as well as extreme temperature variations. The ePAC II unit uses an engineered package with through-hole mounting of the amplifier heat sink to both reduce the heat and the overall size of the cabinet.

The enclosure layout provides additional room for optional internal components while Type 3R protection and electric door interlocks enhance the safety of the package.