Drill pipe quick-connecting mechanism

Abstract

The invention relates to a drill pipe quick-connecting mechanism comprising an upper joint, a lower joint, and an O-shaped ring. The O-shaped ring is installed in an upper joint sealing slot and used for sealing the upper joint and the lower joint. The upper joint and an upper drill pipe are in threaded connection, and the lower joint and a lower drill pipe are in threaded connection. The upper joint thread of the upper joint can be of two different apertures and can be connected with drill pipes of two different apertures, and therefore, quick connection with drill pipes of two specifications is realized. When the upper joint and the lower joint are connected, the side of an upper joint stopper and the side of a lower joint stopper contact each other. When rotating, the upper joint transfers torque to the lower joint through contact of the two sides. An upper joint axial block piece contacts the end face of the lower joint stopper, and bears the axial tension during drill pipe lifting. The mechanism of the invention has the characteristics of compact structure, good sealing performance, large stress area, long service life, convenient disassembly, and the like. The problem that a drill pipe is complex and cumbersome in disassembly and is easy to deform and damage previously is well solved.

Description

technical field [0001] The invention relates to a quick connection mechanism for drill pipes, specifically a mechanism that can be used for quick connection of drill pipes of the same specification and for quick connection of drill pipes of different specifications, and is especially suitable for backpack drilling rigs that require variable diameters. The quick connection belongs to the field of geological exploration. Background technique [0002] In the process of resource exploration and development, the drilling work of the drilling rig requires frequent unscrewing and unloading of the drill pipe, which is complicated, time-consuming and labor-intensive. In the Chinese utility model patent CN202882905U, a portable geological exploration sampling drilling rig is disclosed, in which the connection of the drill pipe adopts the structure of a pull-out pin shaft, which can reduce the workload of unscrewing the drill pipe; in the Chinese utility model patent CN2552937Y, it dis...

AI Technical Summary

Problems solved by technology

The above drill pipe connection structures all use pin-type connections, but geological drill pipes are designed for lightness, and the wall thickness of the drill pipe is often designed to be small. The use of pin-type quick connection structures is prone to stress concentration, resulting in The deformation and damage of the drill pipe reduce the service life of the drill pipe and increase the cost of exploration and development

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