Horizontal well dual caliper

Abstract

The invention provides a horizontal well dual caliper which is used for fundamentally solving the problem that the existing logging instrument can not move up and down for repeated measurement due to structural limit during the operating process. The horizontal well dual caliper comprises a cylindrical matrix as well as an upper joint and a lower joint, and the horizontal well dual caliper further comprises a drive motor, a drive assembly, a hydraulic balance assembly, a sensor assembly, a measurement assembly and a vacuum damping assembly which are sequentially assembled in the cylindrical base. In the invention, after the horizontal well dual caliper is lowered into a well, a sidewall contact device pushes away measuring arms of the caliper, then four measuring arms of the caliper are freely shrunk and expand with change of borehole diameter, and four logging support arms independently drive a potentiometer to move, thus achieving good transfer effect and accurately reflecting change of well wall diameter; and the caliper can be lowered to measure dual-borehole diameter and average borehole diameter, can be singly used and can be also connected with other instruments in series. The horizontal well dual caliper can operate steadily so as to ensure measurement stability and reliability.

Description

technical field [0001] The invention relates to the technical field of oil field logging, in particular to a horizontal well dual-caliper logging tool, which can be mainly used for measuring the borehole diameter of horizontal wells and highly deviated wells. Background technique [0002] The logging tool is suitable for the field of well logging, and can continuously scan the borehole wall, and can also scan any horizontal horizontally, and provide technical data such as the vertical section of the wellbore, the horizontal section, the effective section of the wellbore, and the deviation distance of the wellbore. The logging results can be directly displayed on the computer screen or given by the plotter printer, which is flexible and convenient to use. The use of logging instruments can prevent wellbore deviation, reduce construction period, speed up construction progress, ensure project quality, and have obvious indirect economic benefits and very significant social benef...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dual caliper logging tool for horizontal wells with reasonable structural design, safe and reliable use, and fundamentally solve the problem that the existing logging tool cannot move up and down repeatedly when it is limited by its structure. , at the same time, the device of the present invention runs smoothly, ensuring the stability and reliability of the measurement

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