Well temperature logging tool

Abstract

The invention relates to a well temperature logging tool. The logging tool comprises a control chip, two temperature sensors and a strip-shaped probe tube, wherein the two temperature sensors are bothconnected with the control chip, and the two temperature sensors are arranged inside the probe tube in sequence in the extension direction of the probe tube. According to signals collected by the twotemperature sensors respectively, differential well temperatures are obtained, the probe tube is extended into a well to be logged, and according to the signals collected by the two temperature sensors arranged inside the probe tube, the differential well temperatures at different depths in the well to be logged can be conveniently and accurately obtained. It is understandable that a change trendof the differential well temperatures at different depths in the well to be logged can also be obtained by changing the extension lengths of the probe tube into the well to be logged. The well temperature logging tool is simple in structure, and cannot be restricted by the mouth of the well to be logged, the range of application is wide, and the portability is strong.

Description

technical field [0001] The invention relates to the technical field of well temperature logging, in particular to a well temperature logging instrument capable of measuring differential well temperature. Background technique [0002] Well temperature logging, also known as thermal logging, is a logging method used to study geological structures, rock formation properties, find useful minerals, and check drilling technical conditions based on the law of temperature changes in boreholes with depth. Well logging tools and pressure logging tools are complex in structure, and are easily limited by the wellhead of the well to be logged, so they cannot perform well temperature logging operations well. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a well temperature logging tool capable of measuring differential well temperature in view of the deficiencies of the prior art. [0004] The technical scheme of a kind of w...

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Problems solved by technology

[0002] Well temperature logging, also known as thermal logging, is a logging method used to study geological structures, rock formation properties, find useful minerals, and check drilling technical conditions based on the law of temperature changes in boreholes with depth. Logging tools and pressure logging tools are complex in structure, and are easily limited by the wellhead of the well to be logged, so they cannot carry out the operation of well temperature logging well

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