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Hole diameter logging device

A technology of logging instrument and measuring arm, which is applied in the direction of wellbore/well components, measurement, earthwork drilling and production, etc. It can solve the problems of missing longitudinal fracture detection, poor detection ability of multiple longitudinal fractures, and failure to detect fractures, etc., and achieves improvement The effect of detection ability

Inactive Publication Date: 2015-10-14
胡显三
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The measuring arm of the existing multi-arm caliper logging tool is a group, which contains a plurality of measuring arms uniformly distributed along the circumference of the logging tool, and there is a gap of a certain distance between two adjacent measuring arms. However, there will be cracks on the inner wall of the casing in the longitudinal direction (or the axial direction of the casing) whose width is smaller than the gap between two adjacent measuring arms, which makes the measurement of the inner diameter of the casing difficult. In this multi-arm caliper logging tool, the above-mentioned fractures may be located between two adjacent measuring arms, resulting in the failure to detect the fracture and missing the detection of longitudinal fractures. Therefore, the existing multi-arm caliper logging tools are mostly The detection ability of longitudinal fractures is poor, so it is necessary to propose a new logging tool to improve the detection ability of casing longitudinal fractures

Method used

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  • Hole diameter logging device

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Embodiment Construction

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to figure 1 , a caliper logging tool provided in an embodiment of the present application, comprising: a casing 1;

[0020] A first measuring assembly and a second measuring assembly arranged outside the casing 1 and distributed from top to bottom, the first measuring assembly and the second measuring assembl...

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Abstract

The invention discloses a hole diameter logging device. The logging device comprises a housing body. A first measuring assembly and a second measuring assembly, which are up-down distributed, are arranged outside the housing body. Each of the first measuring assembly and the second measuring assembly comprises preset numbers of measuring arms which are distributed on the housing body at an equal interval. The measuring arms of the firs measuring assembly and the measuring arms of the second measuring assembly are complementary in space. The logging device also comprises a driving piece which is connected with the first measuring assembly and the second measuring assembly and is capable of driving the measuring arms of the first measuring assembly and of the second measuring assembly to rotate around the axis of the housing body. According to the invention, seamless detection ability for longitudinal cracks of a sleeve can be improved.

Description

technical field [0001] The present application relates to the technical field of petroleum well logging, in particular to a caliper logging instrument. Background technique [0002] In the process of oil production, casing wear is unavoidable in oilfields. During the implementation of various oil production measures, the pressure imbalance between wells and layers will be caused, which will intensify fault activity and mudstone water absorption expansion. A series of casing damage phenomena such as chemical corrosion, etc., make the casing wear, corrosion, damage and other deformations. At present, using the caliper logging tool to measure the casing technology is one of the effective means to detect casing damage. The caliper logging tool can reflect the wear, corrosion, damage and other deformation of the casing by measuring the inner diameter of the casing. [0003] Existing logging devices generally use a multi-arm caliper logging tool, which is equipped with a measurin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/08
Inventor 胡显三
Owner 胡显三
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