Fish top detection imaging method and device based on mechanical array probe

Abstract

The invention relates to the technical field of oil well production salvage casing pipes, in particular to a fish top detection imaging method and device based on a mechanical array probes. The imaging device comprises an instrument shell, a circuit cylinder, a motor, a hydraulic pushing device and a mechanical probe part, wherein the circuit cylinder is connected with the motor; the motor is connected with a coupler in the hydraulic pushing device, the hydraulic pushing device is connected with the mechanical probe part, and the mechanical probe part comprises an oil inlet nozzle, pressure guide cavities, sealing cavities, push rods, lower limiting discs, a plurality of pixel probes, displacement sensors and push rods. Pressure guide holes in the pressure guide cavities are uniformly formed in the circumferential direction of concentric circles; A piston is placed in each pressure guide hole, the push rods penetrate through the displacement sensors, the upper ends of the push rods arein contact with the pistons, and the lower ends of the push rods are connected with the pixel probes; and the lower limiting discs are fixed with the sealing cavities. The array probe fish top detection imaging method and device provided by the invention are used for imaging underground fallen objects or fish tops with fractures which are not completely staggered up and down, and are high in efficiency.

Description

technical field [0001] The invention relates to the technical field of oil well production fishing casings, in particular to a fish top detection and imaging method based on a mechanical array probe and a device thereof. Background technique [0002] During the drilling and development of oil and gas fields, due to the long-term high-strength operation of the drill string downhole, it will gradually wear out, which will gradually reduce the strength of the drill string itself, and various failures will cause the top of the fish to deform until it breaks. Fractured drill bits that remain in the wellbore are known as fishovers. After fish fall occurs, if no suitable fishing tool is selected, the tool is not matched with the wellbore, or the fishing measures adopted are improper, it is easy to cause the fish to fall into the well again during the fishing and drilling process. Therefore, when carrying out fishing operations Before the fish top detection was carried out to deter...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a fish top detection and imaging method based on mechanical array probes and its device, which is used for imaging methods for well falling objects or fish tops whose fractures are not completely staggered up and down. The method has high efficiency and is effective for sand buried objects A certain detection depth to solve the problems existing in the existing fish top detection technology

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