Review of PDC cutter – Rock interaction: Methods and physics

Chen, Pengju; Dai, Xianwei; Shao, Fangyuan; Ozbayoglu, Evren; Liu, Wei; Wang, J.H.

doi:10.1016/j.geoen.2023.211995

Cited by 10 publications

(1 citation statement)

References 77 publications

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“…At present, polycrystalline diamond compact (PDC)bits are the most widely used rock breaking tool in oil and gas exploration and development, and their drilling footage accounts for more than 85% of all drilling footage in this industry 1 . However, with the continuous advancement of exploration, an increasing amount of new reserves are being produced from deep wells, ultradeep wells and other areas where mining is more difficult 2 .…”

Section: Introductionmentioning

confidence: 99%

Prediction of formation abrasiveness under the action of a PDC bit based on the fractal dimension of a rock surface

Wang,

Li,

et al. 2024

Sci Rep

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During rock drilling, a drill bit will wear as it breaks the rock. However, there is no uniform grading standard for rock abrasiveness. To solve this problem, the wear mechanisms of a polycrystalline diamond compact (PDC) bit and the formation it is drilling into are analyzed in depth, and an abrasiveness evaluation method based on the fractal dimension of the rock surface topography is established. Initially, a three-dimensional digital model is generated from a scanning electron microscope image of the rock after drilling; next, an evaluation of the irregularities on the rock surface is performed using an adapted Weierstrass–Mandelbrot (W-M) function to ascertain the fractal dimensionality. Then, the microcontact characteristics of the contact surface between the formation and the PDC bit are analyzed, and the distribution of the microconvex contact points of the two-body friction pair in a region is obtained. Because the sliding friction between the drill bit and the rock produces a large amount of heat, according to the contact area formula of the friction surface and heat conduction theory, the temperature rise and overall temperature distribution of the formation and PDC bit under the condition of sliding friction are revealed, and the real contact area between the formation and the drill bit within a certain temperature range is obtained. Finally, the evaluation index of rock abrasiveness under sliding conditions is established by adopting the wear weight loss of the rock cutting tool per unit volume as the index of rock abrasiveness, and the model is verified by a microdrilling experiment. The research in this paper is highly important for improving the rock-breaking efficiency and bit service life during drilling.

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Section: Introductionmentioning

confidence: 99%