Eccentric centralizer for element logging instrument

A technology of element logging and logging tools, applied in the direction of measurement, drilling equipment, borehole/well components, etc., can solve the problems of deviation of measurement results and influence of logging results, etc., and achieve simple structure, convenient use, and guaranteed logging The effect of well quality

Inactive Publication Date: 2017-01-04
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the logging process of the element logging tool, if the radioactive source part of the probe cannot run against the borehole wall, the measurement results will be deviated, which will have a great impact on the logging results
At the same time, the borehole diameter is constantly changing during the logging process. If it cannot run against the borehole wall, it will also affect the logging results.

Method used

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  • Eccentric centralizer for element logging instrument
  • Eccentric centralizer for element logging instrument
  • Eccentric centralizer for element logging instrument

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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0015] Referring to the accompanying drawings, an eccentric centralizer for an element logging tool is installed on the casing 5 of the logging tool, including: a shaft sleeve 2 and an elastic bow 4;

[0016] There are two bushings 2, which are respectively installed at both ends of the casing 5 of the logging tool. Each bushing 2 is provided with a slideway 1 with an outer opening and a closed inner side; the two sides of the bushing 2 are respectively provided with threaded holes ;

[0017] Both ends of the elastic bow 4 are provided with a connecting sleeve 3, and the bottom of the connecting sleeve 3 is provided with a slider and is located in the slideway 1;

[0018] When used in the well, the casing 5 of the logging tool is attached to one side of the well wall, and the elastic bow 4 is used to make contact with the other side wall of the well wall....

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Abstract

The invention belongs to the technical field of logging and particularly relates to a centralizer for an element logging instrument. The eccentric centralizer for the element logging instrument comprises shaft sleeves and an elastic bow, and the shaft sleeves are installed at the two ends of a logging instrument shell. Each shaft sleeve is provided with a slide way with the open outer side and closed inner side. The two ends of the elastic bow are each provided with a connecting sleeve, and a sliding block is arranged at the bottom of each connecting sleeve and located in the corresponding slide way. When the eccentric centralizer is applied inside a well, the logging instrument shell and the face of a well wall are attached, the elastic bow makes contact with the face of the well wall in an abutting mode, and when the well diameter is changed, the two ends of the elastic bow move in the slide ways so that adjustment can be achieved. The eccentric centralizer can adapt to the change of the well diameter, then the instrument can continue to carry out logging by keeping attached to the well wall, and the logging quality is ensured; and the eccentric centralizer is simple in structure and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of well logging, and in particular relates to a centralizer for a well logging instrument. Background technique [0002] During the well logging process of the element logging tool, if the radioactive source part of the probe cannot run against the well wall, the measurement results will be deviated, which will have a great impact on the well logging results. At the same time, the borehole diameter is constantly changing during the logging process. If it cannot run against the borehole wall, it will also affect the logging results. Therefore, in order to enable the instrument to adapt to changes in borehole diameter, an eccentric centralizer is needed so that the instrument can stick to the borehole wall for logging. Contents of the invention [0003] The object of the present invention is to provide an eccentric centralizer for an element logging tool with a simple structure, which can keep the tool runn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10E21B47/00
CPCE21B17/1042E21B47/00
Inventor 林坤马朝选张建军亢楠楠彭晓光
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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