Role of cobalt of polycrystalline diamond compact (PDC) in drilling process

Gu, Jiteng; Huang, Kai

doi:10.1016/j.diamond.2016.03.025

Cited by 37 publications

(6 citation statements)

References 8 publications

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“…This technique is ideal to produce big object of few cm 3 . The amount of binder, as well as the grains size of diamonds, is important for mechanical properties and thermal stability [ 119 , 120 , 121 ] ( Section 6 ). Typically, hardness of PDC is around 70 GPa and thermal stability is 400–500 °C, which are not sufficient when cutting new materials or drilling rocks.…”

Section: On the Way To Catalyst-free/binderless Synthetic Diamondsmentioning

confidence: 99%

A Review of Binderless Polycrystalline Diamonds: Focus on the High-Pressure–High-Temperature Sintering Process

2022

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Nowadays, synthetic diamonds are easy to fabricate industrially, and a wide range of methods were developed during the last century. Among them, the high-pressure–high-temperature (HP–HT) process is the most used to prepare diamond compacts for cutting or drilling applications. However, these diamond compacts contain binder, limiting their mechanical and optical properties and their substantial uses. Binderless diamond compacts were synthesized more recently, and important developments were made to optimize the P–T conditions of sintering. Resulting sintered compacts had mechanical and optical properties at least equivalent to that of natural single crystal and higher than that of binder-containing sintered compacts, offering a huge potential market. However, pressure–temperature (P–T) conditions to sinter such bodies remain too high for an industrial transfer, making this the next challenge to be accomplished. This review gives an overview of natural diamond formation and the main experimental techniques that are used to synthesize and/or sinter diamond powders and compact objects. The focus of this review is the HP–HT process, especially for the synthesis and sintering of binderless diamonds. P–T conditions of the formation and exceptional properties of such objects are discussed and compared with classic binder-diamonds objects and with natural single-crystal diamonds. Finally, the question of an industrial transfer is asked and outlooks related to this are proposed.

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Section: On the Way To Catalyst-free/binderless Synthetic Diamondsmentioning

confidence: 99%

A Review of Binderless Polycrystalline Diamonds: Focus on the High-Pressure–High-Temperature Sintering Process

2022

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“…Despite its superior room temperature properties, PCD materials suffer from thermal instability when exposed to temperatures in excess of 700 °C [5,6,7,8]. The residual metallic binder present in the PCD material following sintering, initiates thermal instability of the tool by inducing graphitisation [5,7,8], oxidation [9,10], and thermal expansion effects [1,11,12] at elevated temperatures. These thermally induced degradation mechanisms could lead to premature tool failure and reduced performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Zrb2 Additions on the Thermal Stability of Polycrystalline Diamond

Jivanji

Forbes

Sithebe³

et al. 2023

Preprint

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“…The footage drilling in oil and gas wells of PDC bits has increased from 2% in 1982 to 90% in 2019. [1][2][3][4] With the focus of oil and gas exploration shifting from shallow to deep, the rock becomes high strength, strong abrasiveness, and poor drillability. 5 Simultaneously, with the increase of drilling depth, it becomes more challenging to apply weight on bit (WOB) and torque on bit (TOB).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on rock‐breaking mechanism and cutting temperature of compound percussive drilling with a single PDC cutter

Wang

Liu

et al. 2021

Energy Science & Engineering

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Compound percussive drilling technology is a new method to improve the rockbreaking efficiency in deep hard formation. In order to study the rock-breaking mechanism of compound impact drilling, the thermal-structure coupling simulation of the dynamic rock-breaking process with a single PDC cutter was investigated by using ABAQUS software. The influence of impact parameters on the rock-breaking performance and cutting temperature was analyzed. The results proved that the compound impact load changes the rock failure mode and improves the rock-breaking efficiency. Compared with steady load cutting, the rock broken volume under compound impact increased by 7.5%, and the mechanical specific energy (MSE) decreased by 12.3%. As the axial impact load amplitude increases, the MSE increases gradually. With an increase in torsional impact load amplitude and impact frequency, the MSE decreases first and then increases, and the optimal torsional static load ratio is 0.3, and the optimal impact frequency is 30 Hz. In addition, the cutting temperature of the compound percussive drilling is higher than that of the steady load cutting, and it increases with the impact load amplitude and decreases with the frequency. For the three impact load waveforms-sine, triangle, and square in this paper, the rock-breaking efficiency under the condition of sine waveform is the largest when the dynamic amplitude of the pulse force is fixed, and the cutting temperature under the condition of square waveform is the highest. Finally, based on the analysis of the rockbreaking mechanism, a novel compound percussive drilling tool was designed and tested in the field.

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Role of cobalt of polycrystalline diamond compact (PDC) in drilling process

Cited by 37 publications

References 8 publications

A Review of Binderless Polycrystalline Diamonds: Focus on the High-Pressure–High-Temperature Sintering Process

A Review of Binderless Polycrystalline Diamonds: Focus on the High-Pressure–High-Temperature Sintering Process

Effect of Zrb2 Additions on the Thermal Stability of Polycrystalline Diamond

Numerical investigation on rock‐breaking mechanism and cutting temperature of compound percussive drilling with a single PDC cutter

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