Diamond drill bit

A diamond drill bit and drill bit technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling and mining, etc., can solve the problems that limit the application of diamond drill bits, and achieve the effects of improving rock breaking efficiency, enhancing rock breaking effect, and improving stability

Active Publication Date: 2017-01-11
CHENGDU WEIYI PETROLEUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This weakness limits the application of

Method used

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  • Diamond drill bit
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Examples

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Embodiment Construction

[0067] The following non-limiting examples illustrate the invention.

[0068] Such as figure 1 , 2 As shown in , 3, a diamond drill bit includes a drill body 1, and several blades 2 extending from the drill body 1, a cutting element 3 is arranged on the blade 2, and the drill bit has at least one annular space around the center of the drill bit bring( figure 1 In the middle are 5 annular blank zones, figure 2 , 3 Among them is 1 annular blank zone, preferably at least 2 circular blank zones, such as Figure 7-10 There are 2 annular blank belts in the middle), and the blade 2 at the position of the annular blank belt is concaved inwardly, forming a circumferentially penetrating groove 7, and the groove 7 is composed of a side wall and a top. A plurality of annular blank bands on the drill bit form a plurality of grooves 7 on the blade 2, preferably at least 2 grooves, and one of the grooves is located at the center of the drill bit, such as Figure 7 , 8 shown. As pr...

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Abstract

The invention discloses a diamond drill bit and belongs to the technical equipment field of petroleum and natural gas drilling engineering, mine engineering, building foundation engineering construction, geologic drilling, tunnel engineering, hydrology, non-excavation and the like. The diamond drill bit comprises a drill bit body and a plurality of blades extending from the drill bit body, wherein cutting elements are arranged on the blades, at least one annular blank belt surrounding the center of the drill bit body is arranged on the drill bit body, and the blades in the position of the annular blank belt are inwards concaved to form circumferentially through grooves. The cutting energy consumption of the drill bit can be reduced, the rock breaking efficiency can be improved, meanwhile, transverse vibration of the drill bit can be inhibited, impact failure of cutting teeth of the drill bit is effectively reduced, the anti-drift capability of the drill bit in directional drilling is enhanced, large-size rock chips can be produced, the geological logging quality is improved, and the underground stratum information analysis and judgement accuracy under the condition of real drilling is improved.

Description

technical field [0001] The invention belongs to the technical equipment fields of petroleum and natural gas drilling engineering, mining engineering, building foundation engineering construction, geological drilling, tunnel engineering, hydrology and non-excavation, and specifically relates to a diamond drill bit. Background technique [0002] The diamond bit is a rock-breaking tool used to break rocks and form a wellbore in drilling engineering. According to the different cutting elements, it mainly includes PDC bits and impregnated diamond bits. [0003] PDC bits rely on high-hardness, wear-resistant, self-sharpening polycrystalline diamond compacts (referred to as PDC teeth or cutting teeth) as cutting elements to shear and break rocks. PDC drill bits have high mechanical penetration rate, long service life and low drilling cost in soft to medium hard formations, so they are widely used in the drilling of oil and gas wells. [0004] Although the hardness of PDC teeth is ...

Claims

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Application Information

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IPC IPC(8): E21B10/36E21B10/43E21B10/16E21B10/50E21B10/55
Inventor 杨迎新黄奎林林敏谢宗亮周坚
Owner CHENGDU WEIYI PETROLEUM TECH
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