Development and application of turbodrills in hot dry rock drilling

• 作者: HU Zhen-zhong HUANG Yu-wen WENG Wei XU Jun-jun YANG Peng ZHANG De-long ZHAO Chang-liang
• 来源期刊: 地下水科学与工程：英文版
• 学科: 工学
• 关键词: HOT DRY ROCK HDR DRILLING GEOTHERMAL DRILLING Turbodrill Field application
• 年，卷（期）: dxskxygcywb_2018,（1）
• 页码范围: 1-6
• 页数: 6页
• 分类号: TV

摘要

The strata of hot dry rock (HDR) are usually igneous rocks with high temperature which are challenging for drilling activities. This paper deals with the key technology and research of turbodrills, introduced the application of turbodrills in HDR drilling at home and broad, and analyzed the field application cases. With the advancement such as low speed high torque turbodrill, reduction turbodrills, independent spindlesection and PDC bearings and so on, the application of turbodrills has widely expanded. The application of high-temperature turbodrills in Fenton Hill, HDR geothermal wells, high-temperature formation in Tahe oilfield all proved that turbodrills are the best downhole motors in deep high-temperature HDR drilling, thus they deserve further research and generalization.