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Keywords: cutter
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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 by...
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...
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 of a...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-098
... selection cutter grain size uniform grain distribution placement ABSTRACT: Rock heterogeneity is an important factor controlling fracture initiation, accumulation, and propagation within rock destruction. Traditionally, rock reaction force instability within rock destruction is associated with...
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-2017-0186
... 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 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0652
... 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 to...
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 the...
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 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 and...
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...
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-2015-280
... explained in this paper. In this study, four different rock samples have been used in cutting tests by a miniature disc cutter. Measured normal, rolling and side forces are recorded to allow for establishing a relationship between cutting geometry and rock strength. The results show a promising correlation...
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...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-391
... unconfined specific energy at failure, cutter rake angle (?), internal friction angle (f) of the rock, and an assumed interface friction angle (?) between the rock and the cutter. The aim of this paper is to evaluate the model proposed by Detournay and Tan (2002). Their model assumes that the interfacial...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7063
... Abstract Modeling of the interaction between the bits cutters and rock is crucial in the rate of penetration (ROP) drilling simulators which simulate the bits performance under different conditions. This paper first analyzes the mechanism of rock failure by roller cone bit’s inserts and PDC...

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