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Compact bit and improved method

A technology of composite drill bits and drill bits, which is applied in the direction of drill bits, drilling equipment, earthwork drilling and production, etc., which can solve problems such as not easy to be pulled out, difficult to pull out drill pipes, and difficult construction, so as to achieve the effect of ensuring its own strength

Inactive Publication Date: 2015-04-15
陈进
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the tail end of the composite drill bit used for downhole rock drilling is a flat section structure, and the joint with the drill pipe is a vertical section. When the drill bit worker drills into the hole, this structure is easy to drill but not easy to pull out. In addition, it is very difficult to pull out the drill pipe after drilling a drilling hole each time. Two to three people are required to pull out the drill pipe at the same time. "Phenomenon, resulting in great difficulty in construction

Method used

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings, but not as any limitation to the present invention.

[0015] Embodiments of the present invention: a method for improving a composite drill bit. The method utilizes the existing brick structure as the basis. The non-working end of the drill body is set as a cone-shaped structure, and a connecting groove is arranged in the non-working end. The groove diameter is consistent with the diameter of the non-working end face of the drill body.

[0016] A composite drill bit constructed according to the above method, as shown in the accompanying drawings, includes a drill body 1, the non-working end of the drill body 1 is a pyramid-shaped structure, and the taper a of the non-working end of the drill body 2 is 20°~ 90°, a connection groove 2 is provided in the non-working end of the drill body 1, and the inside of the connection groove 2 is a thread structure, and the d...

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Abstract

The invention discloses an improved method of a compact bit. The improved method is characterized in that an existing bit structure serves as a basis, a non-working end of a bit body is set into a conical structure, a connecting groove is formed in the non-working end, and the diameter of the connecting groove is consistent with that of the end face of the non-working end of the bit body. After the bit can be connected with the connecting groove, a smooth transition conical surface is formed between the bit and a drill rod (the taper is determined according to practical situations and ranges from 20 degrees to 90 degrees), the diameter of the drill rod is consistent with that of the end face of the non-working end of the bit (the drill rod is used with the connecting groove, and the diameter of the drill rod is consistent with that of the connecting groove), the drill rod and the bit are smoothly transited, a fracture surface cannot be formed between the drill rod and the bit, frictional resistance between the bit and a rock surface is reduced when the drill rod is drawn by a holer, on-site operations and construction progresses of workers are greatly facilitated, the non-working end of the bit is of a conical structure, and the strength of the bit cannot be changed and is ensured.

Description

technical field [0001] The invention relates to a composite sheet drill bit and an improvement method, belonging to the technical field of drill bit improvement. Background technique [0002] At present, the tail end of the composite drill bit used for downhole rock drilling is a flat section structure, and the joint with the drill pipe is a vertical section. When the drill bit worker drills into the hole, this structure is easy to drill but not easy to pull out. In addition, it is very difficult to pull out the drill pipe after drilling a drilling hole each time. Two to three people are required to pull out the drill pipe at the same time. "Phenomenon, resulting in great difficulty in construction. Contents of the invention [0003] The object of the present invention is to provide a composite drill bit and its improved method, which can form a smooth transition cone between the drill bit and the drill rod after the drill bit is connected with the connecting groove. This...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/36
CPCE21B10/46
Inventor 陈进
Owner 陈进
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