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A reaming drill bit

A technology for reaming drill bits and drill pipes, which is applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., and can solve the problems of inability to ream holes and meet the construction requirements of special occasions, etc.

Active Publication Date: 2015-09-30
XIAMEN TEFANG CONSTR ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing drill bit cannot ream the inside of the hole, and cannot meet the construction requirements of special occasions

Method used

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  • A reaming drill bit
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Examples

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Embodiment Construction

[0031] Please refer to figure 1 , a reaming drill bit of the present invention includes a drilling unit 10 and a reaming unit 20 . The drilling unit 10 , the reaming unit 20 and the drill rod 30 rotate synchronously. The drilling unit 10 and the reaming unit 20 can be respectively connected with the drill rod 30 , or can be connected together and then connected with the drill rod 30 .

[0032] The drilling unit 10 is used for drilling holes with constant diameters. The drilling unit 10 is provided with four drill pieces 12, and the drill pieces 12 are evenly distributed, and the angle between two adjacent drill pieces 12 is 90 degrees. The drilling unit 10 only needs to be used for drilling. Therefore, the drilling unit 10 can adopt the related drill structure in the prior art.

[0033] The reaming unit 20 is located above the drilling unit 10 . The reaming unit 20 is used for cutting the sidewall of the hole drilled by the drilling unit 10 to enlarge the cross-sectional a...

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PUM

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Abstract

The invention discloses a reamer bit which comprises a drilling unit and a reaming unit. The drilling unit and the reaming unit rotate synchronously along with a drill pipe. The reaming unit comprises a fixing portion, a locating ring and a reaming cutter. A guiding chute is concavely formed in the outer side face of the fixing portion and comprises a first inclining side wall and a second inclining side wall. The depth of one end of the guiding chute is larger than that of the other end of the guiding chute. The locating ring penetrates through the fixing portion and arranged on the fixing portion in a sleeved mode, a through hole is formed in the locating ring, and the reaming cutter is contained in the guiding chute and the through hole. When the drilling unit rotates forwards and conducts drilling, the reaming cutter abuts against the first inclining side wall and moves to one end of the guiding chute along the first inclining side wall, and therefore the reaming cutter is separated from the side wall of a hole. When the reaming unit rotates reversely, the reaming cutter abuts against the second inclining side wall and moves to the other end of the guiding chute along the second inclining side wall, so that the reaming cutter extends out of the through hole and conducts cutting on the side wall of the hole. The reaming cutter can cut the side wall of the drilled hole, so that the reamer bit has the advantage of reaming.

Description

technical field [0001] The invention relates to a reaming drill bit, in particular to a reaming drill bit used in construction engineering. Background technique [0002] Drilling is carried out with a drilling rig, and due to the influence of the drill bit, only holes with unique apertures can be drilled. Holes with a single diameter cannot meet the construction requirements in some special cases. For example, in rock formations that need to be blasted, people hope that the inside of the hole where the explosives are placed has a larger cross-sectional area, and it is best to have a structure where stress concentration occurs, so that a weak surface appears in the rock formation, thereby enhancing the blasting effect. For another example, when making anchor rods and cables, people also hope that the cross-sectional area of ​​the inside of the hole is larger than the cross-sectional area of ​​the opening of the hole, thereby increasing the frictional resistance of the anchor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/26
Inventor 陈庆猛林奇叶国希王世殿郑志惠陈龙峰陈赟
Owner XIAMEN TEFANG CONSTR ENG GRP
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