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<p>Deep wells and geothermal wells often face the challenge of high temperatures, which significantly affect operations such as drilling and well logging. To ensure the safe and efficient implementation of high-temperature wells, various supporting measures are commonly used to reduce the bottom-hole temperature. This paper analyzes the challenges of high-temperature drilling and discusses the commonly used cooling methods for offshore wells, such as mud cooler, mud pit cooling coils, and annular pressure-boosting pump technologies. A brief evaluation of their cooling effectiveness and applicability is provided. Since the currently used cooling methods still have certain limitations, the paper explores and forecasts alternative cooling techniques with significant future potential. It provides a detailed analysis of the advantages and disadvantages of water-based cooling, phase change material cooling, and inner-coating thermal insulation drill string technologies. This paper offers valuable insights for both offshore and onshore high-temperature well cooling strategies.</p>

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The Current Status and Prospects of Cooling Technology for Offshore High-Temperature Drilling Wells

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Shaowei Zhao,
  • Kun Xu,
  • Zhuangwei Li,
  • Wenlong Li,
  • Chao Liu,
  • Jin Yang

摘要

Deep wells and geothermal wells often face the challenge of high temperatures, which significantly affect operations such as drilling and well logging. To ensure the safe and efficient implementation of high-temperature wells, various supporting measures are commonly used to reduce the bottom-hole temperature. This paper analyzes the challenges of high-temperature drilling and discusses the commonly used cooling methods for offshore wells, such as mud cooler, mud pit cooling coils, and annular pressure-boosting pump technologies. A brief evaluation of their cooling effectiveness and applicability is provided. Since the currently used cooling methods still have certain limitations, the paper explores and forecasts alternative cooling techniques with significant future potential. It provides a detailed analysis of the advantages and disadvantages of water-based cooling, phase change material cooling, and inner-coating thermal insulation drill string technologies. This paper offers valuable insights for both offshore and onshore high-temperature well cooling strategies.