Experimental Study on Force of PDC Cutter Breaking Rock

Wang, Jia Jun; Zou, De Yong

doi:10.4028/www.scientific.net/amm.602-605.361

Cited by 6 publications

(12 citation statements)

References 7 publications

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“…Appl et al [6] developed a new cutter wear model from the cutting experiments. Wang et al [7] established a new cutter-rock interaction model on the basis of experiments of cutting shale with PDC cutter. Kris [8] tested four different batches of PDC under monotonic and cyclic loadings, and researched fracture and fatigue of PDC.…”

Section: Fig 1 Statistics On Failures Of Pdc Bit Cuttersmentioning

confidence: 99%

Failure analysis and optimum structure design of PDC cutter

Kong¹,

Liang²,

Zhang³

2017

mech

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Section: Fig 1 Statistics On Failures Of Pdc Bit Cuttersmentioning

confidence: 99%

Failure analysis and optimum structure design of PDC cutter

Kong¹,

Liang²,

Zhang³

2017

mech

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“…Cutter Geometry Parameters (Back-Rake and Side-Rake Angles). Studies have demonstrated that cutting forces (vertical and cutting forces) are minimal at back-rake angles of around 15° [7,11,15,16]. In addition, specific energy and back-rake angle exhibit a nonlinear relationship.…”

Section: Introductionmentioning

confidence: 99%

“…Besides the normal force from the weight on the bit, the contact area between the cutter and rock is also dependent on the wear condition of the cutter. The effects of the cutting area on applied forces have been extensively investigated experimentally [2,3,11,16,19]. Experimental and theoretical studies were conducted to evaluate the lapping effect of the adjacent cutter on the surface area [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Application of Digitalization in Real-Time Analysis of Drilling Dynamics Using Along-String Measurement (ASM) Data along Wired Pipes

Gomar

Elahifar

2022

Energies

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An automated drilling system requires a real-time evaluation of the drilling bit during drilling to optimize operation and determine when to stop drilling and switch bits. Furthermore, in the dynamic modeling of drill strings, it is necessary to take into account the interactions between drilling bits and rock. To address this challenge, a hybrid approach that combines physics-based models with data analytics has been developed to handle downhole drilling measurements in real time. First, experimental findings were used to formulate mathematical models of cutter–rock interaction in accordance with their geometrical characteristics, rock properties, and drilling parameters. Specifically, these models represent the normal and contact forces of polycrystalline diamond compact cutters (PDCs). Experimental data are analyzed utilizing deep learning, nonlinear regression, and genetic algorithms to fit nonlinear equations to data points. Following this, the recursive least square was implemented as a data analytic method to integrate real-time drilling data, drilling bit models, and mathematical models. Drilling data captured by the along-string measurement system (ASM) is implemented to estimate cutting and normal forces, torque, and specific energy at the bit. The unique aspect of this research is our approach in developing a detailed cutter–rock interaction model that takes all design and operation parameters into account. In addition, the applicability of the algorithm is demonstrated by real-time assessments of drilling dynamics, utilizing downhole digital data, that enable the prediction of drilling events and problems related to drilling bits.

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“…MC Jaime et al 4 established the finite element modeling of rock cutting in the drilling process. J Wang and D Zou 5 discussed the mathematical relationship between the tangential and positive forces on unit cutting area. J Zhang and J Li 6 indicated that the way of cutting rock was determined by the size of drilling pressure, and the change of rotary speed should be changed according to the physical property of coal rock.…”

Section: Introductionmentioning

confidence: 99%

Influence of polycrystalline diamond compact bit geometric parameters on drilling performance during gas drainage borehole in soft coal seam

Han

Zhang

Wang

et al. 2018

Advances in Mechanical Engineering

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Polycrystalline diamond compact bit is the main rock-breaking tool of gas drainage borehole. In order to investigate the influence of geometric parameters of polycrystalline diamond bit on its drilling performance, the integrated force model of polycrystalline diamond bit pressed into rock was established. The stress analysis results show that the tooth rake angle, pressing depth, and horizontal tangential displacement are the main factors to influence the normal load and the axial load of polycrystalline diamond bit. There is an optimal tooth rake angle value of polycrystalline diamond bit cutter when it is used in the soft coal seam. The drilling experiment system was built to verify the drilling performance of drill bits with different geometric structure and different tooth rake angle through drilling the soft coal wall. The experiment results show that the drilling torque and feeding resistance of polycrystalline diamond bit are higher than that of the wing bit at the beginning of drilling the soft coal wall. With the increase in the drilling depth, the feeding resistance of wing bit will increase to exceed that of the polycrystalline diamond bit. So the polycrystalline diamond bits should be selected to drill the gas drainage borehole in soft coal seam. The polycrystalline diamond bit with bigger tooth rake angle cannot cut and break the coal rock effectively, which will reduce the drilling efficiency and the feeding speed. When the tooth rake angle is smaller, polycrystalline diamond bit cannot cut in coal wall effectively, which will increase the feeding resistance. So the polycrystalline diamond bit with tooth rake angle of 15°-20°is suitable for the gas drainage borehole in soft coal seam. With the increase in the rotary speed of polycrystalline diamond bit, the cutting thickness of coal rock decreases and the horizontal tangential displacement increases. When the rotary speed of polycrystalline diamond bit is 290 r/min, the mean drilling torque and mean feeding resistance of polycrystalline diamond bit reach the minimum. Therefore, in order to reach the optimum drilling performance, the working parameters of low drilling pressure and high rotary speed are usually selected during the actual gas drainage borehole in soft coal seam.

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Experimental Study on Force of PDC Cutter Breaking Rock

Cited by 6 publications

References 7 publications

Failure analysis and optimum structure design of PDC cutter

Failure analysis and optimum structure design of PDC cutter

Application of Digitalization in Real-Time Analysis of Drilling Dynamics Using Along-String Measurement (ASM) Data along Wired Pipes

Influence of polycrystalline diamond compact bit geometric parameters on drilling performance during gas drainage borehole in soft coal seam

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