Effect of cobalt content on the performance of polycrystalline diamond compacts

Huang, Haifang; Zhao, Bin; Wei, Wenliang; Si, Zhihua; Huang, Kai

doi:10.1016/j.ijrmhm.2020.105312

Cited by 34 publications

(4 citation statements)

References 10 publications

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“…When designing a mixed arrangement of cutters for a drill bit, it is recommended to place the axe cutters in the leading row of the blade while alternating the triangular prism and axe cutters in the rear row of the blade to fully utilize the benefits of the mixed arrangement of cutters in the drill bit. (3) The spacing between the cutters has a significant impact on the stability of the rockbreaking process. When designing a mixed arrangement of cutters for a drill bit, it is recommended to set the longitudinal distances between the leading row of axe cutters and the rear row of triangular prism cutters and axe cutters at 10 mm and 10.06 mm, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…However, unconventional oil and gas resources are located in complex formations and are difficult to extract [2], which puts higher requirements on the performance of drill bits. It is well known that PDC (Polycrystalline Diamond Compact) bits have higher wear resistance and efficiency compared with roller cone bits, especially in hard formations [3,4], leading to a higher market share of PDC bits, which was investigated to be as high as 75-80% in 2018 [5,6]. Nevertheless, the prevailing PDC bits utilized in drilling operations predominantly rely on the shearing action provided by the mounted cutters.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation and Field Test of a PDC Bit with Mixed Cutter Arrangement to Break Non-Homogeneous Granite

Yuan

Zhang

et al. 2023

Applied Sciences

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As the depth of petroleum drilling increases, the strata environment becomes more complex. The efficiency and lifespan of Polycrystalline Diamond Compact (PDC) drill bits fail to meet current drilling demands. However, the structure and arrangement of PDC cutters are valuable determinants of drilling efficiency, although related research still has gaps and deficiencies. This study focuses on PDC cutters in axe, triangular prism, and circular forms. It establishes an inhomogeneous granite model based on the actual measurements of granite and verifies the accuracy of this model through uniaxial compression simulation. Finite element models of three types of cutters in various combination schemes are constructed to examine rock-breaking effects, with the best scheme optimized using Box-Behnken response surface methodology. The rock-breaking process of the optimal PDC drill bit layout has been compared to that of a single cutter bit. Field drilling has demonstrated the effectiveness of a mixed cutter arrangement. The results show that the inhomogeneous granite model can be trusted. The optimal arrangement involves axe cutters in the front row and an alternate arrangement of triangular prism cutters and axe cutters in the back row. The optimal lateral and longitudinal distances for the triangular cutters from the front row of axe cutters are 10 mm and 7 mm, respectively, while those for the back row of axe cutters from the front row are 10.06 mm and 7 mm, respectively. The ROP standard deviation in the drilling process of mixed cutter bits decreases by 53.06% and 43.08% compared to axe and triangular prism cutter bits, respectively. The drilling efficiency increases by 16.8% and 16.6%, respectively, demonstrating higher efficiency and stability. Field drilling results indicate that a mixed cutter bit increases efficiency by 23.5% compared to a bit with only triangular prism cutters. This study posits that research on the combination schemes and parameters of PDC cutters can significantly enhance drilling efficiency, thereby reducing the drilling cycle and costs.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Field Test of a PDC Bit with Mixed Cutter Arrangement to Break Non-Homogeneous Granite

Yuan

Zhang

et al. 2023

Applied Sciences

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“…The experimental results showed that the thermal stability of the new PDC has been improved. Because the relevant research has proved that cobalt as a binder has good compatibility with carbon in the sintering process of PDC, and can also reduce the sintering temperature and pressure [7]. Therefore, PDC materials are generally sintered by diamond powder and cemented carbide and cobalt as a binder under high temperature and high pressure [8].…”

Section: Introductionmentioning

confidence: 99%

Lubrication performance of nano-molybdenum disulfide as additive in drilling fluid in polycrystalline diamond compacts

Gou,

Chen,

et al. 2023

Int J Adv Manuf Technol

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The effects of nano-molybdenum disul de (nano-MoS 2 ) in drilling uid and drilling uid on the tribological behavior of polycrystalline diamond compact (PDC) with cobalt leaching depth of 422µm were studied by ball-on-disk friction test, and the effects of concentration and bearing capacity were evaluated respectively. The results showed that the addition of nano-MoS 2 improves the lubrication effect of drilling uid and the friction performance of PDC. The lubrication mechanism of drilling uid and the mechanism of adding nano-MoS 2 to improve tribological properties are discussed. The results further deepen the understanding of the friction and wear mechanism of PDC in lubricating environment, and provide a theoretical reference for the application of PDC in the future petroleum eld.

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“…Two-layer polycrystalline diamond composites (PDC) are most often used for drilling and cutting tools [ 7 , 8 ]. The top diamond layer of PDC consists of metal infiltrated diamond material, while the substrate layer is made of a hard alloy (for example, WC-8Co).…”

Section: Introductionmentioning

confidence: 99%

Diamond Composites Produced from Fluorinated Mixtures of Micron-Sized and Nanodiamonds by Metal Infiltration

et al. 2022

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Improving the operating performance of superhard composites is an important and urgent task, due to a continuing industrial need. In this work, diamond composites with high wear resistance were obtained by sintering fluorinated mixtures of micron-sized diamonds with nanodiamonds at high pressures and temperatures (7–8 GPa, 1550–1700 °C). Aluminum and cobalt powders were added to the diamond mixture to activate the process. The external infiltration of nickel into the diamond layer was carried out additionally during the sintering process, and the effects of nickel infiltration on the structure and properties of composites were studied. The metal melt ensured the mass transfer of carbon within a volume, and the formation of a strong diamond framework. The composition of the additives was selected in such a way that the binding phase became ultimately composed of the intermetallic AlNixCo1−x(x ≤ 1). The Young’s modulus of composites synthesized in this way had a value of 850 GPa, and their wear resistance when turning white granite was more than twice as high as that of premium commercial PDC. The obtained results thus demonstrate that by using nickel to increase melt infiltration into diamond-based composites, the mechanical properties of Al/Co/fluorinated diamond compositions, studied previously, can be further improved.

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Effect of cobalt content on the performance of polycrystalline diamond compacts

Cited by 34 publications

References 10 publications

Numerical Simulation and Field Test of a PDC Bit with Mixed Cutter Arrangement to Break Non-Homogeneous Granite

Numerical Simulation and Field Test of a PDC Bit with Mixed Cutter Arrangement to Break Non-Homogeneous Granite

Lubrication performance of nano-molybdenum disulfide as additive in drilling fluid in polycrystalline diamond compacts

Diamond Composites Produced from Fluorinated Mixtures of Micron-Sized and Nanodiamonds by Metal Infiltration

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