A directional plugging device for well wall stability in deep water wells

Abstract

The invention discloses a directional plugging device for the stability of the well wall of a deep water well. The angle between the extension columns, in this way, can easily realize the angle adjustment of the directional plugging position of the well wall, so as to adapt to the corresponding angle of the deep well, improve the applicability, and prevent the device from being stuck in the downhole during the directional plugging; The sealing mechanism of the present invention includes at least three fan-shaped blocking blocks, and an interval sealing cavity is arranged between two adjacent fan-shaped blocking blocks, and the control air pump can fill the interval sealing cavity with gas, thereby making each of the fan-shaped sealing chambers The plugging block overcomes the pulling force of the elastic band so that the outer peripheral surface of the fan-shaped plugging block abuts against the well wall, which facilitates the use of the three fan-shaped plugging blocks of the present invention to limit the plugging slurry and realize the circumferential sealing. Blocking.

Description

technical field [0001] Specifically, the invention relates to a directional plugging device for stabilizing the well wall of a deep water well, and relates to the related field of well wall fixed plugging of a deep water well. Background technique [0002] For drilling deep wells, when drilling deep wells, with the continuous drilling of the drill pipe, when encountering a hard drilling position or adjusting the drilling angle, the drill pipe will have a great impact on the upper well wall. This kind of collision force will cause damage to part of the well wall, and if the well wall is damaged, if it is not treated in time, it will easily collapse. It is more fragile, and over time, it is easy to block the wellbore, which not only affects the efficiency and reliability of drilling, but also is prone to deformation and collapse of the well wall, which affects the angle adjustment of the drill pipe and the drilling operation of the drill pipe during subsequent drilling. . C...

AI Technical Summary

Problems solved by technology

[0002] For drilling deep wells, when drilling deep wells, with the continuous drilling of the drill pipe, when encountering a hard drilling position or adjusting the drilling angle, the drill pipe will have a great impact on the upper well wall. This kind of collision force will cause damage to part of the well wall, and if the well wall is damaged, if it is not treated in time, it will easily collapse. It is more fragile, and over time, it is easy to block the wellbore, which not only affects the efficiency and reliability of drilling, but also is prone to deformation and collapse of the well wall, which affects the angle adjustment of the drill pipe and the drilling operation of the drill pipe during subsequent drilling.

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