Joint with hole-repairing drill bit

Abstract

The invention relates to a joint with a hole-repairing drill bit, comprising a joint body and a cone, wherein the joint body is divided into a female buckle end, a joint body middle section and a male buckle end, the upper end of the joint body is the female buckle end, the lower end of the joint body is the male buckle end, the interiors of the female buckle end and the male buckle end are horn-shaped, the interior of the female buckle is long-horn-shaped and a large horn opening is upward, and the lower end of the male buckle end is micro-horn-shaped and a horn opening is downward; both of the female buckle end and the male buckle end are provided with threads, as well as connected with an upper drilling tool and a lower drilling tool via the threads; a fluid channel is arranged at the axial centre of the joint body, a cone installation section is axially arranged at the middle section of the joint body, and the outer diameter of the cone installation section is less than the maximum outer diameter of the joint body; and a jaw is arranged on the cone installation section, the cone is installed on the jaw, and cutting teeth are distributed on the cone. The joint is simple in structure, and low in manufacturing cost and use cost; and the problem of sticking of large-sized tools, e.g., a stabilizer and well drilling tools such as a drill collar, during a trip-out process can be solved, the processing time of the sticking can be saved, and the well drilling efficiency can be improved.

Description

Technical field [0001] The invention relates to a joint with a repair drill bit, in particular to a joint with a reversely arranged repair cone drill bit, which belongs to the field of petroleum drilling as well as the field of geological drilling. Background technique [0002] During the tripping process, due to the shrinkage of the wellbore and the excessive curvature of the wellbore, the drilling tool was blocked, and the drilling tool could not even be moved up and down, resulting in stuck drill accidents. In the entire drill tool assembly, the outer diameter of the stabilizer and the drill collar is relatively large, so the above problems are prone to occur. When dealing with these problems, it is usually first to try to move the drilling tool forcibly to achieve the purpose of releasing the jam. If it fails, only inject a special soaking fluid and use its physical and chemical effects to release the jam. The above conventional treatment methods take a long time and increase...

AI Technical Summary

Problems solved by technology

When dealing with these problems, it is usually first to try whether the drilling tool can be forcibly moved to achieve the purpose of unblocking. If it fails, only inject a special soaking liquid and use its physical and chemical effects to release the jamming. The above conventional treatment methods are time-consuming and increase drilling costs.

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