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Keywords: penetration
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0141
... penetration contact interaction algorithm 1. INTRODUCTION Fluid transport in any geological formation is significantly enhanced by the presence of various types of discontinuities: fractures, joints, faults or fragments. They appear as pre-existing geological features or as induced fractures by the...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2075
... model for predicting the progressive evolution of damage zone around the wellbore drilled in naturally fractured shale formations. The Mohr Coulomb model has been employed to capture the plastic behavior of the naturally fractured shale formations, while strength reduction caused by the penetration of...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0509
... ABSTRACT: Operators and service companies are always interested to have a clear insight about the rate of penetration (ROP) since it will provide a good estimate for the time and the cost of the drilling operations. The aim of this work is to use recurrent neural networks (RNNs) to accurately...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1697
... shaft reduced in response to installation. Modeling & Simulation measurement circle Duan lateral stress contact normal stiffness penetration test pile installation porosity numerical investigation displacement pile Reservoir Characterization displacement Pile Penetration diameter...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-667
... Cutter Wear tunnel cutter wear bit selection node cutter prediction hard rock tbm University information application penetration Bayesian network installation radius cutterhead thrust 1. INTRODUCTION Disc cutter is the core component for TBM (Tunnel Boring Machine) to break the rock...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-892
... Savonniere model prediction excellent agreement theoretical model experimental data cartridge actuated disc actuation penetration adc model 1. INTRODUCTION Undercutting discs are defined as the third class of cutting tools, after drag cutters and indenters, where a disk-shape cutter is used like...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-909
... without considering the rock behavior during production. It is assumed that the horizontal wellbore is fully penetrated in the middle of a box-shaped drainage area with 5000 ft length and 1000 ft height. The Babu and Odeh 1989 model is used for the wellbore production prediction. Fig. 7. Reservoir and...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-344
... projectile-target interface different perforation condition penetration depth mathematical model wellbore pressure numerical simulation result formation pressure single charge penetration unknown function penetration length Wellbore Fluid 1. INTRODUCTION During past few decades, shaped charge...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-813
... ABSTRACT : Mechanical Specific Energy (MSE) characterizes the input and expenditure of energy during drilling. The rate of penetration of a drill bit (ROP) is the result of how much effective energy can be applied to break and remove rock. With evolving technologies and downhole sensors...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0269
... Stille upper surface channel upper surface fracture characterization experimental data new model fracture deformation traditional model penetration characteristic grout penetration deformation 1. INTRODUCTION Rock masses in the field are commonly accompanied by faults, like rock fractures...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0317
... penetration drilling fluid permeability Qinshui Basin fluid density deformation ABSTRACT: Borehole stability is of great concern in drilling wells in coal seams to extract coalbed methane, especially for horizontal wells within which excessive cuttings due to formation failure would easily incur...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0429
... ABSTRACT: Rate of Penetration (ROP) is defined as the volume of rock removed per unit area (ft) per unit time (hrs). There are several published models to predict the rate of penetration; however, most of them focus on drilling parameters such as: string revolutions per minute, weight on bit...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0747
... cold-water injection crack growth in-situ stress geothermal reservoir displacement thermal stress transient cooling interaction Fluid Dynamics discontinuity element boundary element method penetration permeability injection equation 1. INTRODUCTION Thermal cracking has been regarded as...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-1000
... ABSTRACT: Though employing low grouting pressure in rock mass results in a decrease of length of grout penetration and ends up with an incomplete grouting process, conversely, high grouting pressure may cause undesired fracture initiation. Hence, prediction of minimum required rock mass...
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-2016-456
... the drilling time which can potentially save millions of dollars. Numerous individuals have analyzed theoretical rate of penetration (ROP) equations by finding the optimum value for constant drilling parameters for single bit runs, however, since the formation drilling variables change throughout the...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-522
..., after each impact. These two measurements enable to investigate the link between the penetration of the bit after each impact and the average rate of penetration of the bit after multiple impacts. Understanding and quantifying the dependence of these relationships on indexation and impact energy will...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-474
... tool. This paper focuses on calibrating the micro-seismic response to rock failure mechanisms, improved Rate of Penetration (ROP) and cutting particle-size distribution. Concrete cylinders with comparable properties to natural rock were fabricated in the laboratory. Drill-Off Tests (DOT) were conducted...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-518
... Abstract One of the major challenges during drilling in hard-brittle formation in Tarim basin is to evaluate the rock drillability and to predict the rate of penetration (ROP) accurately. The aim of this article is to analyze the drilling resistance of rock breaking and to predict the ROP...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-065
... unconventional oil and gas play in the Denver-Julesburg Basin. Hydraulic fractures were stimulated by injection of plastic epoxy. Injected epoxy clearly marked the fluid penetrated zones of the stimulated fractures, partially preserved the in-situ fracture aperture and bonded the fracture faces to give improved...

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