A pdc drill bit with cutting elements arranged in pairs

A cutting element, paired technology, used in drill bits, drilling equipment, earth-moving drilling, etc., can solve problems such as rapid wear failure of composite sheets, reduced cutting efficiency and working life of drill bits, and limited impact resistance and thermal wear resistance. , to improve the efficiency of rock breaking, enhance the ability to eat into the formation, and prolong the life.

Active Publication Date: 2019-04-12
四川川石金刚石钻头有限公司
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  • Claims
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AI Technical Summary

Problems solved by technology

Although the hardness of PDC teeth is high, the impact resistance and thermal wear resistance are limited. It is easy to cause rapid wear and failure of the composite sheet, and one of the most typical failure forms is the impact and collapse of the diamond layer of the composite sheet. The collapse of the composite sheet greatly reduces the cutting efficiency and working life of the drill bit

Method used

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  • A pdc drill bit with cutting elements arranged in pairs
  • A pdc drill bit with cutting elements arranged in pairs
  • A pdc drill bit with cutting elements arranged in pairs

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Embodiment Construction

[0033] The following non-limiting examples illustrate the invention.

[0034] Such as figure 1 , 2 As shown, a PDC drill bit with cutting elements arranged in pairs, including a drill body 1, a fixed blade 2, a cutting element 4, a water hole or a nozzle 5, etc. are arranged on the fixed blade, and it is characterized in that: there are at least two Cutting elements 31 and 32 are angled and are provided in pairs on 2 cutting element bits.

[0035] Preferably, the deflection angle θ of the paired cutting elements 3 ranges from 5°≤|θ|≤85°, such as figure 1 , 2 , 3 shown.

[0036] Preferably, the paired cutting elements 3 are arranged on the same fixed blade 2, and the deflection angle directions of the paired cutting elements are opposite, that is, one is positive and the other is negative, such as figure 2 shown.

[0037] Preferably, the paired cutting elements are arranged on different fixed blades, such as Image 6 shown. Pairs of cutting elements are angled in the...

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Abstract

A diamond bit having cutting members arranged in pair includes a bit body and fixing blade wings; the cutting members, water holes or spraying nozzles are arranged on the fixing blade wings; at least two cutting members have deflection angles, and the two cutting members are arranged on the bit body in pair. The structure can improve the ability of the bit to drill stratum and the rock breaking efficiency, can improve the intensity of teeth of the bit, can prolong the service life of the bit, can reduce the torque of the bit, and can enhance the drilling stability of the bit; and the diamond bit can be specially used for directional drilling.

Description

technical field [0001] The invention belongs to the fields of oil and gas drilling engineering, mining engineering, building foundation engineering construction, geological drilling, tunnel engineering, hydrology and non-excavation technical equipment, and specifically relates to a PDC drill bit with paired cutting elements. 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. Although the hardness of PDC teeth i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/43E21B10/54
CPCE21B10/43E21B10/54
Inventor 刘伟
Owner 四川川石金刚石钻头有限公司
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