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FastCAP's ULYSS EG for MWD and LWD
In this paper, we’ll introduce FastCAP’s Ulyss EG as a solution for generator energy buffering and bus stabilization. Measurement While Drilling (MWD) and Logging While Drilling (LWD) operations often require constant power to sustain sensors, communication links, and downhole tools for best accuracy and speed. Mud turbine generators are a common source of downhole power. They provide electric power by steering mud flow through a turbine assembly which in turn generates electricity. AC/DC power converters regulate the power bus for delivery to the downhole instruments. However, drilling operations frequently require mud flow to be turned off, disabling the downhole turbine from generating electricity, leaving power bus without a primary source. For this reason, Lithium-thionyl chloride (Li‑SOCl2) batteries are often used in conjunction with a downhole turbine in order to regulate the power bus during those times when mud flow is off. As an alternative solution, FastCAP Systems is currently offering high temperature ultracapacitors suitable for downhole energy storage and battery replacement. FastCAP’s ultracapacitors are rechargeable, high power devices that are safe to operate and contain no hazardous materials.
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