This paper describes the development and field trial test of a new well intervention service tool for lifting observation wells for oil saturation logging. The Well Intervention Service Tool (WIST) is a high efficiency, slim hole pumping system that is conveyed and powered through a wireline power cable to appropriate depth in order to lift wellbore fluids. A multi-resettable inflatable packer system was developed to work in conjunction with the permanent magnet motor pumping system, which allows the pump to be positioned and repositioned in the well as required. This improves operational efficiency, enabling jobs to be conducted in a single run, rather than multiple runs as would be the case with conventional packer design.

A field trial test was conducted to qualify the prototype system. This paper will describe the test result and future improvement plans. This lightweight cable deployed pump system is an alternative to coiled tubing and nitrogen lift jobs, which can often be expensive and logistically challenging, requiring large amount of equipment and personnel at the wellsite to perform the activity.

Solutions to the issues encountered during this work have since been successfully implemented in further testing.

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