ePAC™ II Progressing Cavity Pumping

Quick Links to Information Below

• ePAC II Progressing Cavity Pumping Overview
• Interfaces of the ePAC II Progressing Cavity Pumping Systems
• ePAC II Progressing Cavity Pumping Data Protection
• ePAC II Progressing Cavity Pumping Performance Features
• Cost Saving Features of using ePAC II Progressing Cavity Pumping Systems

ePAC II Progressing Cavity Pumping Highlights

Limits rod torque PCP specific firmware Reduces power consumption Minimizes equipment wear Maximum torque from zero to base speed High speed operation up to 300-Hz Downhole pump protection Gauge option controls low fluid level    without pumpoff Reduces backspin time Flexible configuration Simple operation and setup Programmable restart function

• ePAC II Progressing Cavity Pumping Drive Protection
• Specifications of the ePAC II Progressing Cavity Pumping

PDF Documents

• ePAC II Progressing Cavity Pumping
• ePAC II Progressing Cavity Pumping - Spanish Version
• ePAC Progressing Cavity Pumping
• ePAC Progressing Cavity Pump System - Russian Version
• ePAC Progressing Cavity Pump System - Spanish Version

ePAC II Progressing Cavity Pumping Overview

Designed for oilfield applications, the ePAC II progressing cavity pumping (PCP) unit incorporates flux vector technology allowing precision control of both speed and torque in all applications and well conditions.

The critical challenge in optimizing 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 variable speed drives (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.

eProduction Solutions’ (eP’s) ePAC II drive package provides precision control of both speed and torque at all speeds. This not only allows you to match the drive speed to well conditions but also supplies the required torque to operate when fully loaded. Precision torque control also means there is no need to oversize the drive relative to the motor for pump startup.

Drive reliability requires the proper enclosure to protect the sensitive electronics from foreign material as well as extreme temperature variations. The ePAC II unit utilizes an engineered package with through-hole mounting of the amplifier heatsink 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.

eP’s VSD package has these unique features:

Interfaces of the ePAC II Progressing Cavity Pumping Systems

• Keypad/display
• MODBUS® RTU serial

ePAC II Progressing Cavity Pumping Data Protection

• Drive keypad can archive and store the drive parameters in the event you need to transfer the information to another drive or reload the values
• PC interface software allows you to transfer drive parameters to PC for storage and reference
• Multilevel password protection allows critical drive parameters to be accessible only with password

ePAC II Progressing Cavity Pumping Performance Features

• Configurable auto restart after power loss or fault condition
• Normal stop with deceleration time and DC injection hold allows rod string to unwind downhole minimizing top side backspin
• Speed search feature minimizes backspin while controlling torque on system
• Differential pressure sensing of pump inlet and casing gas pressure prevents pumpoff conditions
• Low torque detection indicates a rod break, belt failure, or plugged sand screen
• Low flow detection for enhanced pump protection (requires surface flow meter input)
• Quick start menu setup decreases startup time
• Reliable operation
• Enhanced bus voltage control minimizes over voltage trips caused by back spinning loads
• Multiple readout display
• Configurable control methods (open loop vector or V/Hz)

Cost Saving Features of using ePAC II Progressing Cavity Pumping Systems

• Underspeed detection protects the system in case of a stall condition such as a stuck pump
• Dual motor capability allows large PCPs to be operated by a single drive
• User torque limit protects against downhole breakage
• Energy saving feature minimizes power use
• Auto restart minimizes downtime

ePAC II Progressing Cavity Pumping Drive Protection

• Ground fault
• Motor phase-to-phase short circuit
• AC input overvoltage
• AC input undervoltage
• Instantaneous overcurrent
• Motor overload
• Heatsink over temperature
• Power transistor fault
• Logic power undervoltage
• Inlet and outlet phase loss protection
• Motor runaway
• Memory malfunction
• Processor running fault

Specifications of the ePAC Vector Flux Drive With PCPs