Hole driven type horizontal directional drilling reverse circulation hole dilating drill

Abstract

The invention provides a hole driven type horizontal directional drilling reverse circulation hole dilating drill. The inner parts of a drill cone and a pen-shaped conehead of a drill body are both hollow cavities, a turnplate is arranged at the middle part of a transmission shaft in a power drive device, a cone seat provided with a cone is arranged on the turnplate, the tail end of the drill cone is arranged on the rear end part of the transmission shaft, the tail end of the pen-shaped conehead is arranged on the front end part of the transmission shaft, and an electric motor drives the turnplate and the cone to do rotation motion through the transmission shaft. The electric motor is positioned in the cavity of the drill cone and a drill rod joint is inserted in the cavity of the pen-shaped conehead, or the electric motor is positioned in the cavity of the pen-shaped conehead and the drill rod joint is inserted in the cavity of the drill cone. The inner part of the drill rod joint isa hollow cavity, the cavity is communicated with the external part through the cavity of the pen-shaped conehead or the cavity of the drill cone and a plurality of slag suction ports, and the slag suction ports are positioned at the side below the cone. By adopting the drill, various disadvantages of surface drive in the prior art can be overcome, and the difficult problem of difficult slagging in the traditional positive circulation major diameter horizontal directional drilling method can be overcome.

Description

technical field [0001] The invention relates to an in-hole driving type horizontal directional drilling reverse circulation reaming drill bit, which is used for oil gas or municipal pipeline laying construction by adopting horizontal directional drilling technology, and belongs to the technical field of non-excavation engineering. Background technique [0002] At present, in the construction of pipelines using horizontal directional drilling technology, as the length of the pipeline and the diameter of the borehole become larger, the difficulty of the project is also increasing. Especially for large-scale horizontal directional drilling crossing projects, the required construction equipment is also very large. The torque of the drilling rig often needs to reach more than 100,000 Nm, and the pulling force of the drilling rig must reach more than 300 tons. Now the largest pulling force of the drilling rig has up to 800 tons. In addition, with the increase of the hole diameter...

AI Technical Summary

Problems solved by technology

[0004]2) The rotation of the drill pipe has a great influence on the stability of the hole wall, and it is also easy to change the shape of the drilled hole

[0005]3) Surface power is lost in the process of being transmitted from the drilling rig to the reaming bit through the drill pipe

[0006]4) When there is a lot of sediment in the hole and the sand content in the mud is large, it is easy to cause serious wear of the drilling tool, excessive reaming torque, and drill sticking and drilling. Tool breakage and other engineering accidents

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