A lanthanum bromide crystal detector special for an element logging instrument

By improving the structural design of the lanthanum bromide crystal detector, the problems of large light loss and poor shock resistance of existing detectors in downhole vibration environments have been solved, achieving efficient light collection and convenient maintenance, and ensuring the detection efficiency and accuracy of the detector.

CN224417041UActive Publication Date: 2026-06-26CHINA OILFIELD SERVICES LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA OILFIELD SERVICES LTD
Filing Date
2025-07-31
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing element logging instruments suffer from problems such as high light loss, poor vibration resistance, and difficult maintenance, especially in downhole vibration environments, which leads to decreased light collection efficiency and high maintenance costs.

Method used

The compact lanthanum bromide crystal detector design includes a Teflon protective sleeve, a crystal housing assembly, a photomultiplier tube, and an elastic component. The tapered opening design and aluminum housing improve light collection efficiency, while the elastic component provides axial force to maintain tight contact. All components are detachable for easy maintenance.

Benefits of technology

It improves optical coupling efficiency, enhances seismic resistance, reduces maintenance costs, and ensures the accuracy and depth of detection results.

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Abstract

The utility model belongs to petroleum logging instrument technical field discloses a kind of lanthanum bromide crystal detectors special for element logging instrument. Including lanthanum bromide crystal;Iron fluorine Long protective sleeve, it is cut along the center axis and is equipped with conical opening, to tightly wrap lanthanum bromide crystal and leave out light receiving surface in the side towards photomultiplier;Crystal shell assembly, for accommodating and protecting iron fluorine Long protective sleeve and lanthanum bromide crystal;Multiplying tube shell, with crystal shell assembly can be detached connection;Photomultiplier, located in multiplying tube shell and with multiplying tube shell gap cooperation, and by elastic component, so that photomultiplier and lanthanum bromide crystal are always tightly contacted;Probe end cover, one end with multiplying tube shell detachable connection, the other end with electronic skeleton detachable connection;And electronic skeleton, for fixed circuit board, circuit board and photomultiplier electric connection. The utility model's lanthanum bromide crystal detector special for element logging instrument structure is compact, anti-seismic, easy to maintain and light collection efficiency is high.
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