Multi-finger Caliper (40 finger) is a high-precision wellbore detection tool widely used in oil logging. It is mainly used to measure the diameter and shape changes of the inner wall of the wellbore to assess the integrity, deformation, corrosion and wear of the casing.
Multi-finger Caliper (40 finger) Features
◆ High-Precision Measurement & Three-Dimensional Imaging
Through to contact with the wellbore through multiple independent measuring fingers, it can measure the inner diameter and shape changes of the casing, and generate high-quality three-dimensional images. This technology can clearly display defects such as deformation, misalignment, cracks and holes of the casing, providing a scientific basis for casing maintenance and repair. For example, A-One Oil tool's single-cycle ultra-high refresh rate delivers damage detection performance that is 3–5 times better than the traditional tools.
◆ Multi-functional Integration & Data Fusion
It can be used independently or connected with other logging tools (such as Electromagnetic Flaw Detectors, Electromagnetic Thickness Tools, Gamma Well temperature and CCL, and Gyro Inclinometers) to obtain multiple types of data with a single well entry. This integrated approach improves the logging efficiency, reduces operation time, and provides more comprehensive downhole information.
◆ Wide Range of Application Fields
It is not only used for the detection of casing deformation and corrosion, but also for perforation hole identification, wellbore location, well structure determination, etc. For example, in the practical application of a certain oilfield, the Multi-finger Caliper (40 finger) successfully identified casing cracks and holes, and provided crucial data support for downhole operations.
Measurable Project Range
◆ Casing Inner-Diameter Variation
It can precisely measure the inner diameter changes of the casing, including local or overall dimensional changes caused by corrosion, deformation, bending, depressions, pits, etc. It is crucial for assessing the integrity of casing, especially during the development and maintenance of oil and gas wells.
◆ Casing Deformation
Through the synchronous action of multiple measuring fingers, it can detect the radial deformation of the casing, such as elliptical deformation and axial distortion. It can identify whether the casing is affected by external pressure or internal stress.
◆ Casing Corrosion & Wear
It can detect the corrosion and wear on the inner wall of the casing, and determine the depth and extent of the corrosion by measuring the radial displacement change of the finger. The great significance for preventing leaks and wellbore failures caused by corrosion.
◆ Casing Fractures & Cracks
It can identify the fractures and cracks of the casing and determine whether there is structural damage by measuring the abnormal displacement of the arm. The detection is crucial for ensuring the safety of the wellbore and the stability of production.
◆ Perforation Hole Distribution
It can be used to inspect the distribution of perforation holes, evaluate the perforation effect, ensure the uniform distribution of perforation holes in the target layer, and improve the productivity of oil and gas wells.
◆ Well Wall Geometry
It can generate three-dimensional images of the well wall, showing the geometric shape changes of the well wall, including ellipticity, eccentricity, etc. The visual data can help engineers understand the condition of the wellbore intuitively.
◆ Casing Thickness Variation
Through logging the inner and outer diameters of the casing, it can calculate the wall thickness variation of the casing, evaluating the strength and durability of the casing.
◆ Wellbore Deviation & Inclination
Some multi-finger calipers are also equipped with tilt sensors and angle sensors, it can log the deviation and inclination of the wellbore, providing data support for the optimization of the drilling trajectory.
◆ Multi-parameter Integrated Logging
It is usually used in combination with other logging tools (such as Electromagnetic Flaw Detector Tool, Electromagnetic Thickness Tool, Gamma Well Temperature, and CCL Tool, Gyro Inclinometer Tool etc.) to achieve multi-parameter integrated logging, improve logging efficiency and data integrity.
◆ Wellbore Integrity Evaluation
Through comprehensively analyzing the logging data of Multi-finger Caliper, it can evaluate the overall integrity of the wellbore, identify the potential leakage points and structural defects, and provide a scientific basis for the maintenance and repair of the wellbore.
Conclusion of Multi-finger Caliper (40 finger)
Multi-finger Caliper (40 finger) is a multifunctional tool in the field of oil logging, it can provide detailed information focusing on the inner wall of the wellbore, offer main support for the development, maintenance and safety management of oil and gas wells.
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