Soil layer variable-diameter machinery reamer bit and drilling method using same

Abstract

Provided is a soil layer variable-diameter machinery reamer bit and a drilling method using the same. The soil layer variable-diameter machinery reamer bit comprises a base, a reaming telescopic arm,a transmission rod, a variable-diameter control rod and a drill; the reaming telescopic arm comprises a first connection rod and a second connection rod, the first end of the first connection rod is hinged to the base, the second end of the first connection rod is hinged to the first end of the second connection rod, the second end of the second connection rod is hinged to the drill, the drill isconnected to the transmission rod, the transmission rod is connected to the variable-diameter control rod, and the variable-diameter control rod is movably connected to the base. The soil layer variable-diameter machinery reamer bit and the drilling method using the same have the advantages of being capable of adjusting the diameter to ream and drill holes and advancing and retreating free at non-reaming sections.

Description

technical field [0001] The invention relates to a drill bit used in conjunction with a tool part or tool for additional processing, relates to a drill bit with an expandable cutting tool, in particular to a soil layer variable-diameter mechanical reaming drill bit and a drilling method using the drill bit. Background technique [0002] At the beginning of the 1990s in China, there were relatively mature technologies and drill bits for expanding head bored piles, but they are still not widely used, and these drill bits are mainly for large-diameter piles, while for small-diameter anchor rods and The construction technology and equipment for expanding the head of small-diameter piles are still relatively small. Due to the large diameter of bored piles, the control structure used to control the reaming of the drill bit has enough space to follow the drill pipe to the drill bit, so it is not difficult to implement. However, the bolt hole diameter is relatively small, and the dev...

AI Technical Summary

Problems solved by technology

[0002] At the beginning of the 1990s in China, there were relatively mature technologies and drill bits for expanding head bored piles, but they are still not widely used, and these drill bits are mainly for large-diameter piles, while for small-diameter anchor rods and The construction technology and equipment for expanding the head of small-diameter piles are still relatively small. Due to the large diameter of bored piles, the control structure used to control the reaming of the drill bit has enough space to follow the drill pipe to the drill bit, so it is not difficult to implement.

However, the diameter of the bolt hole is relatively small, and the device for precise control of the diameter of the reaming hole cannot reach the drill bit, so it is difficult to precisely control the diameter of the reaming hole.

Similarly, due to the small diameter of the drilled hole, the use of an overly complicated mechanical reaming drill bit structure often cannot meet the strength requirements

There are eccentric drills and pipe drills that can enlarge the hole, but the diameter of the hole is limited, the change from the original diameter is not large, and the diameter of the expansion is not ideal, so it has not been popularized and applied.

Therefore, there is no relatively mature product of the bolt reaming drill bit so far.

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