Design and Practice of Heat‐Resistant Structure of Deep‐Hole X‐Ray Fluorescence Logging Probe Tube

ABSTRACT

X‐ray fluorescence (XRF) logging technology serves as a critical analytical tool for deep mineral resource exploration and exploitation. However, the inherent geothermal gradient in deep borehole environments creates elevated ambient temperatures that adversely affect XRF measurement accuracy during logging operations. This study addresses the thermal regulation challenges in deep‐borehole spectroscopic logging by proposing an innovative hybrid active‐passive thermal regulation system for controlling probe temperature. Through comprehensive thermodynamic simulations using three‐dimensional modeling software and experimental validation, it is demonstrated that the system can keep the performance of the detector under extreme thermal conditions. The results show that when exposed to temperatures up to 100°C, the proposed system successfully maintains the probe temperature below 50°C while ensuring stable detector operation for a minimum duration of 2 h.