Compound rotary drilling rig drilling mechanism

Abstract

The invention relates to a compound rotary drilling rig drilling mechanism which is provided with a long tube shape coat drill pipe of which the upper part is provided with a mud discharging port. The lower end of the coat drill pipe is fixedly connected with a heavy-calibre drill by a flange bolt; a spiral drill pipe coaxially rotating is arranged in the coat drill pipe; the bottom end of the rotary drill pipe is connected with a guiding drill; the coat drill pipe and the spiral drill pipe are in sectioned connection structure; two ends of the coat drill pipe and the spiral drill pipe are respectively provided with a quick-change connector capable of quickly splicing and installing; the upper part of the spiral drill pipe is connected with a motor; and meanwhile, the motor is meshed and connected with the gear on the coat drill pipe in a driving mode. The compound rotary drilling rig drilling mechanism has the construction function of a common drilling mechanism, can conveniently adjust the length of the drill pipe and carry out heavy-calibre drilling construction, can pump drilled mud and sand out of the drill pipe, effectively improves progress of works, solves the problem of poor stability caused by an over-high rotary drilling rig and is convenient to transport the rotary drilling rig.

Description

technical field [0001] The invention relates to a drilling device of a rotary drilling rig, in particular to a drilling mechanism of a composite rotary drilling rig. Background technique [0002] At present, the rotary drilling rig has become the main pile foundation hole-forming tool in the construction of railways, highways, water conservancy, and civil construction in various countries in the world. However, since the drilling diameter of the drilling rig is generally between 400-600mm, it is difficult to There is nothing you can do. Moreover, if the drill pipe of the drilling rig is too long, the stability of the drilling rig will be greatly affected, which limits the safe use of the equipment and cannot meet the needs of engineering construction. In addition, during the rotary drilling process of the drill bit, when the drill bit is filled with soil and sand materials, the drill bit needs to be lifted out of the hole, and the soil and sand materials in it are dumped on...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the functionality of the existing rotary drilling rig, the present invention proposes a composite rotary drilling rig drilling mechanism, which not only has the construction function of a general drilling mechanism, but also can conveniently adjust the length of the drill rod and perform large-scale drilling. caliber drilling construction, and can automatically discharge the drilled mud and sand directly out of the drill pipe, which greatly improves the efficiency, effectively improves the progress of the project, solves the problem of poor stability caused by the high rotary excavator, and is also convenient transportation of the rig

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