Impact drill bit of full-hydraulic reverse circulation drilling machine

Abstract

The invention provides an impact drill bit of a full-hydraulic reverse circulation drilling machine. The impact drill bit comprises compression springs, spring positioning sleeves, studs, locking nuts, an impactor, a conveying pipe welding assembly, bolts and a drill bit welding assembly. The impact drill bit has the advantages that the impact drill bit is scientific in design and unique in structure; the impactor and the drill bit welding assembly are smartly combined with each other, sufficient impact can be generated by the impactor to crush rock when large-aperture drilling operation is carried out on rock strata, accordingly, holes in the rock strata which are difficult to drill or cannot be drilled fundamentally can be easily drilled by the impact drill bit, and problems which urgently need to be solved in the industry for a long time can be solved; only little torque on drill pipes is generated by the impact drill bit, so that problems of insufficient power of an existing drilling machine and damage to existing drill pipes can be solved; excellent drilling service effects can be realized for geologic strata such as clay layers and sand layers by the impact drill bit of the full-hydraulic reverse circulation drilling machine, and the impact drill bit is particularly high in drilling speed and efficiency when used for drilling large-aperture holes in the rock strata.

Description

Technical field [0001] The invention is the field of drilling machine technology, involving a shock drill of a full hydraulic anti -circulating rig. Background technique [0002] At present, most of the drills used in the market are dragon door drills and three -wing straight drills, which are generally made by users.The main body of the drill is composed of 2 spiral blades. The alloy knife head is welded on it. The alloy knife head is staggered on the 2 spiral blades to reduce the drilling resistance and increase the number of cutting times.However, when the rock layer is drilled into the operation, the drill head torque is large and the drill motor is insufficient, and it cannot be drilled. At the same time, due to the large drill torque, it is easy to cause damage to the drill rod.These drills have good effects in drilling in clay layer, sand layer, etc., but it is difficult to drill in the rock layer and cannot even achieve drilling operations. Invention content [0003] In ...

AI Technical Summary

Problems solved by technology

However, when drilling in large-diameter rock formations, the torque of the drill bit is large, and when the power of the drilling rig is insufficient, it cannot be drilled. At the same time, due to the large torque of the drill pipe, it is easy to cause damage to the drill pipe.

These drill bits work well in drilling into clay layers, sandy soil layers, etc., but it is difficult to drill into rock layers, and it is even impossible to achieve drilling operations

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