... of cutting, and can improve the cutting depth, reduce the contact friction, and reduce the MSE (mechanical specific energy) of rock breaking. The simulated rock crushing state show that under the composite impact, increasing the amplitude of horizontal impact load is beneficial to increase number and length...

... percussion of 3 times and 4 times. Cutting force with percussion amplitude of 1.5mm increased by 42.7% compared with percussion amplitude of 0mm. The rock-breaking specific energy with percussion amplitude of 1.5 mm increased by 32.4% compared with percussion amplitude of 0 mm. This study provides...

... and height difference between the stinger and conventional cutters on cutting force, the distribution characteristics of cuttings and cutting groove shape characteristics were investigated. The experimental results show that the mechanical specific energy (MSE) decreases first and then increases...

... 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...

... ABSTRACT: This research presents a case study of the use of specific energy measurements to map and model pit-scale faults in the Granite Pit at Gibraltar Mine, an open pit metal mine in British Columbia, Canada. Specific energy data were collected during drilling of over 100,000 blast holes...

... ABSTRACT: Thermal spallation is a non-contact rock-breaking method, in which the surface of the rock is rapidly heated to induce small flakes or spalls. Specific energy is usually used to evaluate the drilling performance, which is defined as the amount of energy required to remove a unit...

... a relatively small rock sample with realistic grain size. It has been shown previously that the cutting specific energy, derived from the tangential force, estimates the specific energy. In this study, mechanical properties of a Bentheimer sandstone was determined by laboratory testing. The commercial Particle...

... and finite element methods. The numerical models were carried out under different geometrical configurations, varying the cutter chamfer size and back-rake angles. The forces generated on the cutter are translated into mechanical specific energy, MSE as this parameter is often used to measure drilling...

... calculation interface friction angle catoosa shale upstream oil & gas pierre shale drilling smith strength specific energy detournay pdc cutter cutter shale friction angle bit design bit selection hole pressure manco shale coefficient internal friction angle direct shear...

...-penetration curve of indentation test. The relationship of both specific energy (SE) and volume of crater (V c ) with BI has been investigated, and the influence of confining pressure (C p ) on BI has also been studied. The results indicate that both the SE and V c have a good non-linear correlation with BI...

... is weight on bit (WOB), v is rate of penetration (ROP), D is the bit diameter, a is the specific energy. Equations (8) and (9) are the fractal mode of rock crushing specific energy, which can be calculated from the size distribution of cuttings. Equation (10) is the rock crushing specific energy under...

... Abstract This work reports a test of empirical equations for the relationship of mechanical specific energy (MSE) and rate of penetration (ROP) with key drilling parameters including both weight on bit (WOB) and rotation rate of the drill bit per minute (RPM). The test of the above empirical...

... Abstract Rock cutting mechanics has been studied in order to better understand drilling process in cutter scale. The cutting energy is mainly dependent of cutter orientation and rock properties. It was previously reported in the literature that specific energy is strongly dependent...

...1. INTRODUCTION Mechanical Specific Energy (MSE) and Rate of Penetration (ROP) are two key factors for evaluating the efficiency of a drilling process [1] and together they form a good base for strategizing a desirable drilling operation. MSE is defined as the energy required to removing a unit...

... Wellbore Design Reservoir Characterization Upstream Oil & Gas strength specific energy bit selection revolution reservoir geomechanics cutting friction back rake angle geometry equation variation specimen limestone rock cutting MSE rock mechanical property cutter single...

... was run [7]. In this paper, the concept of Drilling Specific Energy (DSE) is used to formulate a specific energy performance indicator which can analyze the efficiency of the CT Turbodrilling process. Specific energy models uses fewer parameters compared to the ROP models and are easier to use in terms...

... Reservoir Characterization specific energy international journal Upstream Oil & Gas dust generation sandstone orientation pyramidal surface attack 45 rock surface critical speed pick start pick profile Engineering specific energy decrease geometry fragment Pick Profile...

... Reservoir Characterization saturation effect side force sandstone reduction Upstream Oil & Gas strength performance prediction rock test proceedings Cutter Penetration dry rock reservoir geomechanics specific energy variation specific energy variation deeper penetration penetration 1...

... of particles in contact; the shear and normal stiffness of the bond; Reservoir Characterization full model disc cutter reservoir geomechanics groove cutter half model snapshot slab cutting rock sample cutting Upstream Oil & Gas modeling lateral distance specific energy evolution...

... is intrinsic specific energy (or energy required to cut a unit volume of rock in the ductile regime). In the brittle regime (primary chipping), the mean force evolves non-linearly with the depth of cut and the specific energy E (or mean energy to cut a unit volume of rock) is found smaller than the intrinsic...