Rigless-Deployed Electrical-Submersible-Pumping System

Saudi Aramco and Baker Hughes introduced the TransCoil rigless-deployed electrical-submersible-pumping (ESP) system, which is designed to help operators bring wells on production faster and lower the costs associated with installing and replacing ESPs. Because they can eliminate the need for a rig in fields where rig availability is a concern or where high intervention costs can limit artificial-lift options, operators can minimize deferred production and lower their overall lifting costs to extend the economic life of their assets. The system features an inverted ESP system with the motor connected directly to a proprietary power-cable configuration, eliminating the traditional ESP power cable-to-motor connection, which improves overall system reliability. Unlike wireline-deployed ESPs, the fully retrievable system does not have an in-well wet connection, which requires a rig to pull and replace if the wet connection fails. The power-cable design enhances the reliability of the deployment string compared with coiled-tubing-deployed ESPs that simply pull the power cable through the coiled tubing. Extensive fatigue testing and thermal growth analysis were conducted to enhance materials selection and system design. The TransCoil system cable design also extends the operating range to 12,000 ft compared with traditional coiled-tubing-deployed ESP systems, which are limited to approximately 7,000 ft.

The TransCoil rigless-deployed ESP system, developed by Baker Hughes in conjunction with Saudi Aramco, reduced ESP installation time and overall workover costs by more than 50% in a Middle East field.



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