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Keywords: cutter
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1281
... ABSTRACT: Hot dry rock (HDR) is an important global clean energy resource. However, the drilling process is difficult due to the hardness and abrasiveness of the rock. In this paper, the single PDC cutter tests were conducted to investigate the mechanism of rock breaking at different target...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1108
... as a function of rock properties and cutter specifications in the laboratory. One of the famous institute having LCM equipment is Earth Mechanics Institute (EMI) of Colorado School of Mines (CSM). Besides the EMI, several institutes such as Istanbul Technical University, Turkey and Central South University...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1723
... Abstract Though various nonplanar PDC cutters have been proposed to enhance the drilling performances of PDC bits in hard formations, few researches systematically figure out the differences in the rock-breaking mechanisms and in the rock-breaking efficiency. Compared to the conventional...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0368
... ABSTRACT: Polycrystalline Diamond Compact (PDC) cutter tests were performed on different rock samples under atmospheric pressure to compare the impact of different cutters arrangements on drilling parameters. The precise effect of cutter geometry and area on a flat bit was studied...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1898
... and optimized design of cutter structures is very important. Based on this idea, a novel diamond hybrid bit is designed in this paper by combing the PDC and impregnated diamond cutter. The impregnated diamond cutter was optimized from nine kinds of formula. The final novel hybrid bit has six blades with 28 PDC...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2088
... conditions and is associated with formation of wear-flats on the cutters, accompanied by gradual reduction in rate of penetration. A test protocol was developed to measure and quantify the variation of PDC cutter response as the wear flat area grows. The experiments were performed using rectangular PDC...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1728
... ABSTRACT: During the tunnel boring machine excavation, temperature on the disc cutter increases greatly due to the friction heat. High temperature will speeds up wear loss of disc cutter and deteriorate physical and mechanical properties of rock mass. Consequently, safety, cost and cutting...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1706
... ABSTRACT: This paper utilizes Itasca's PFC3D to simulate linear rock cutting using disc cutters. The objective is to determine the correlation between excavated surface roughness and cutting forces experienced during excavation. The flat-joint BPM model was used to create a synthetic...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-667
... ABSTRACT: Tunnel Boring Machine (TBM) has been widely used in various types of tunnel construction. The disc cutters are key component of TBM which affecting the construction duration, cost and safety of TBM tunnel significantly. According to site investigation and field data, the cutter wear...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-892
... ABSTRACT: Actuated Disc Cutter is an undercutting disc, which is dynamically actuated while being dragged across the rock surface. In simple terms, undercutting discs are roller disc cutters that are used like drag tools to undercut rocks. This mechanism allows to combine the robustness...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-098
... relations between rock structure options and reaction force oscillations were proposed. This work hypothesizes the idea, that rock structure options are factors of drill bit whirling. The author innovated the Wojtanowicz and Kuru’s force static balance model (1993) to simulate numerically 3-cutter movement...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-956
... ABSTRACT: Roof failures in the longwall headgates mostly occur outby the T-junction area within the front abutment pressure zone. The roof in this area could fail in the form of cutters, sagging, or collapse. Although front abutment pressure, high horizontal stress, and adverse roof geology...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0652
... for the assessment of rock strength in a borehole has led to development of a borehole strength measurement probe, namely Rock Strength Borehole Probe (RSBP). RSBP is designed to scratch the surface of rock with a miniature disc cutter inside a relatively slim borehole. The cutting forces are measured and used...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0885
... ABSTRACT: Numerical rock cutting simulations are performed for different cutter configurations. Special attention is given to the contact region between the cutter and the rock. Frictional contact is solved using a Gap Based Augmented Lagrangian approach, in order to minimize...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0105
... ABSTRACT: Cutter, the fundamental cutting element of PDC (Polycrystalline Diamond Compact) bit, directly determines the overall performance of PDC bit and thus influences Rate of Penetration (ROP), drilling efficiency and drilling cost. Bit scrapped caused by cutter failure accounts for about...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0186
... ABSTRACT: During the last decades, researches about tool/rock interaction of Polycrystalline Diamond Compact (PDC) cutters have been focusing on numerical modeling aspect due to its time efficiency compared to the laboratory testing. Among the different numerical methods, researchers commonly...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-124
... reaction frame on which the cutter is mounted. The metrics from the linear cutting machine include cutter forces, penetration, specific energy, cutting sequence, cutter speed, angle of attack and cutter tilt. The benefits of this work are more efficient designs of excavation machines such as shearers...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-400
.... In this case it is hard to predict the chip size and optimal depth of cut because the criterion is beyond the model. In this paper, the developed theory of zonal disintegration is applied to analysis of rock cutting by PDC cutter process. It is shown that initial shear stress at the cutter tip causes...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-624
... Flow Code in 3D (PFC3D) was used to simulate the rock sample. Micro-properties of the sample were calibrated to match the lab results. Extensive sensitivities carried out on cutter-to-particle size ratio, depth of cut, cutting speed and back-rake angle. The results showed that the cutter-to-particle...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-388
... Abstract This paper presents the results of numerical modeling through finite element method and discrete element method for single cutter drilling in carbonate samples. This work is relevant to understand the mechanics of drill bit – rock interaction while drilling deep wells and the results...

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