Well wall stabilizing device for tight oil well drilling

Abstract

The invention discloses a well wall stabilizing device for tight oil well drilling. A first stabilizer and a second stabilizer are connected together in an adjustable-interval manner through a stableforce adjusting mechanism, the stable force adjusting mechanism can adjust and control the stable force of the first stabilizer and the second stabilizer, and work under the optimal stable force is facilitated. An auxiliary grouting bag is connected between the first stabilizer and the second stabilizer, a grouting cavity is formed between the auxiliary grouting bag and the portion, to be groutedand reinforced, on the well drilling wall, a grouting device communicates with the grouting cavity, the grouting device can be used for injecting quick setting reinforcing slurry to the grouting cavity, the grouting cavity is filled with the quick setting reinforcing slurry, after setting, the loosening position of the upper portion of the tight oil well drilling well is stabilized, the well wallreinforcing can be effectively improved, the auxiliary grouting bag can be tightly combined together with the quick setting reinforcing slurry, whole reinforcing effect on the well wall can be formed,and collapse falling of soil and the like on the side can be prevented.

Description

technical field [0001] The invention relates to the technical field of oil drilling, in particular to a well wall stabilizing device for tight oil drilling. Background technique [0002] For oil extraction, it generally needs to drill an oil well first, so that the oil in the rock formation is extracted. When drilling an oil well, the well wall of the oil well is prone to problems such as damage or cracking, especially the upper well wall of the well. Because the upper layer is relatively soft, the well wall is more likely to be damaged, and the upper well wall is being drilled. During design and extraction, the frictional force and bumping force are greater. Therefore, the upper part of the well wall needs to be reinforced, and the ordinary way of pouring cement is difficult to meet the conditions for the upper part of the initial drilling. In addition, it is difficult to repair and strengthen the upper well wall that is damaged in the middle of drainage, which affects the...

AI Technical Summary

Problems solved by technology

When drilling an oil well, the well wall of the oil well is prone to problems such as damage or cracking, especially the upper well wall of the well. Because the upper layer is relatively soft, the well wall is more likely to be damaged, and the upper well wall is being drilled. During design and extraction, the frictional force and bumping force are greater. Therefore, the upper part of the well wall needs to be reinforced, and the ordinary way of pouring cement is difficult to meet the conditions for the upper part of the initial drilling. In addition, it is also difficult to repair and strengthen the upper well wall that is damaged in the middle of drainage, which will affect the stability of the well wall and the smoothness of mining.

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