超万米深井机械式随钻测温装置研制与试验
朱芝同 , 左泽旭 , 吴川 , 梁健 , 刘天乐 , 邵玉涛
地球科学 ›› 2026, Vol. 51 ›› Issue (8) : 2967 -2976.
超万米深井机械式随钻测温装置研制与试验
Development and Testing of a Mechanical While⁃Drilling Temperature⁃Measurement Device for Ultra⁃Deep Wells
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为解决超万米深井钻探中电子测温装置因高温失效的难题,研制了一种基于不可逆热敏显色原理的机械式井下随钻测温装置. 该装置集成于绳索取心钻具内管总成,利用特定熔点材料覆盖层熔化显色记录最高温度,并通过打捞矛将内管总成打捞到地表后进行数据的读取. 试验表明,装置测温范围为37~260 ℃,测量误差低于5%,且在37~65 ℃区间分辨率为3 ℃,65~260 ℃区间分辨率为6 ℃. 此外,装置需要约需30 min达到热平衡状态以进行稳定测量,并在72 h长期恒温试验中验证了优异的稳定性.该机械式测温装置无需电子元件,成功克服了超深井高温环境限制,可为万米以深钻探工程提供有效的孔底温度随钻测量手段.
To address the failure of electronic temperature⁃measurement devices caused by extreme downhole temperatures in ultra⁃deep (10,000⁃m⁃class) drilling, this study developed a mechanical temperature⁃measurement device for while⁃drilling applications based on an irreversible thermo⁃chromic (heat⁃sensitive color⁃development) principle. Integrated into the inner⁃tube assembly of a wireline coring drill, the device uses a color⁃developing coating composed of materials with specified melting points to record the maximum downhole temperature reached. After retrieval of the inner⁃tube assembly to the surface using an overshot, the temperature record can be read. Experimental results show that the device measures temperatures from 37 to 260 ℃, with measurement errors below 5% in the 110–260 ℃ range. The resolution is 3 ℃ from 37 to 65 ℃ and 6 ℃ from 65 to 260 ℃. In addition, the device requires about 30 minutes to reach thermal equilibrium for stable measurement, and a 72⁃hour constant⁃temperature test verified its excellent stability. Because it contains no electronic components, the mechanical device avoids the high⁃temperature limitations of ultra⁃deep wells and provides an effective method for while⁃drilling bottom⁃hole temperature measurement in drilling projects exceeding 10,000 meters.
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深地国家科技重大专项资助:超万米科学钻探井身结构及绳索取心钻具研发(2024ZD1000901)
中国地质调查局地质调查项目“固体矿产高效精准勘探技术及自动化钻探装备升级与应用”(DD20242850)
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