Polycrystalline diamond compact drill bit and machining method thereof

A technology of polycrystalline diamond and composite disc drill bit, which is applied in the direction of drill bit, drilling equipment, earthwork drilling, etc. It can solve the problems of easy formation of mud balls, increase of drilling resistance, difficulty in core chip removal, etc., so as to prevent mud balls and quickly Effect of chip removal and prevention of chip accumulation

Inactive Publication Date: 2019-10-25
立府精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the existing polycrystalline diamond compact drill bit is difficult to remove chips in the core, easy to form mud bags, increase drilling resistance, and reduce drilling efficiency.

Method used

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  • Polycrystalline diamond compact drill bit and machining method thereof
  • Polycrystalline diamond compact drill bit and machining method thereof
  • Polycrystalline diamond compact drill bit and machining method thereof

Examples

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Embodiment Construction

[0031] A polycrystalline diamond compact drill bit, comprising a body 1 and several main blades 2 arranged on the body 1, main chip removal grooves 11 are arranged between the main blades 2, and the front end of the main blades 2 extends to The inner cone of the body 1, the center of the body 1 is provided with an auxiliary blade 3, the auxiliary blade 3 is arranged inside the main blade 2 and forms an auxiliary row with the main blade 2 A chip flute 12, the two ends of the secondary chip flute 12 communicate with the adjacent main chip flute 11 respectively.

[0032] In the structure of the present application, since the center of the main body 1 is provided with an auxiliary blade 3, mud pockets are easily formed on the auxiliary blade 3. In the prior art, part of the front end of the main blade 2 extends to the center of the body 1. Part of the front end of the main blade 2 is easy to form a mud bag, but in the structure of the prior art, the debris in the center can only b...

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Abstract

The invention discloses a polycrystalline diamond compact drill bit. The polycrystalline diamond compact drill bit comprises a main body, and multiple main cutter wings arranged on the main body; mainchip discharge grooves are formed between the main cutter wings; the front ends of the main cutter wings extend to an inner cone part of the main body; a secondary cutter wing is arranged at the center part of the main body, and is arranged on the inner side of the main cutter wing; a secondary chip discharge groove is formed between the secondary cutter wing and the main cutter wing; and the twoends of the secondary chip discharge groove communicate with the adjacent main chip discharge grooves. The polycrystalline diamond compact drill bit can quickly discharge chips to prevent the chip accumulation and the bit balling. The invention further discloses a machining method of the polycrystalline diamond compact drill bit for machining the polycrystalline diamond compact drill bit; and graphite pieces are placed in tooth holes before heating of blanks, and are taken out after the blanks are cooled to the normal temperature to prevent incapability of installing polycrystalline diamond compacts or other teeth after deformation of the tooth holes.

Description

technical field [0001] The invention relates to the field of oil drilling, in particular to a polycrystalline diamond composite drill bit. Background technique [0002] The existing polycrystalline diamond compact drill bit comprises a columnar body on which blades and water holes are arranged, the lower surface of the body is divided into a core, an inner cone, and a nose from inside to outside, and the side surface of the body From bottom to top, it is divided into shoulder and gage section. Correspondingly, the blade is divided into core section, inner cone section, nose section, shoulder section and gage section. The blade is fixed with cutting teeth, and the adjacent A chip discharge groove is provided between the blades, and water holes are arranged in the chip discharge groove for spraying away soil in the chip discharge groove. The position of the blade nose section is the lowest and the teeth are densest, and the nose section plays the main role of impact and cutti...

Claims

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Application Information

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IPC IPC(8): E21B10/46E21B10/54E21B10/60
CPCE21B10/46E21B10/54E21B10/602
Inventor 薛中学任振龙陈斌高磊刘振伟
Owner 立府精密机械有限公司
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