Energy Storage Systems for Drilling Rigs
By: Evgeniy Chupin, Konstantin Frolov, Maxim Korzhavin, Oleg Zhdaneev (December 29, 2021)
This article delves into the pivotal role energy storage systems play in the ongoing global energy transition, emphasizing its relevance in both developed and developing nations. It specifically discusses the evolution of an electric energy storage system for drilling, drawing its foundation from electric-chemical generators. The primary focus lies on drilling rigs isolated within individual pads, which may be powered by diverse sources such as diesel gensets, gas piston power plants, or 6-10 kV HV lines. Analyzing the power operating modes of these rigs, the research culminates in presenting a novel energy storage module architecture. This hybrid design uniquely integrates Li-ion cells with supercapacitors, and the deployment of three-level inverters to manage the system. Various integration options of the system into a unified rig power circuit are explored, with the article endorsing an optimal solution. Through a simplified mathematical model, the article offers insights into the projected return on investment for the storage system across different usage scenarios and rig operations. The research underscores the storage system's efficiency in managing temporary high-load peaks, typical of drilling rigs, guiding stakeholders in selecting the most suitable storage system variant.