... 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...

... Abstract Detournay and Tan (2002) performed experiments with a rock cutting device to measure the load required to fail the rock under confining stress. They proposed models describing the correlation between the specific energy and confining stress for shear dilatant rocks as a function...

... 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...

...-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...

... distribution energy consumption energy conservation reservoir geomechanics wellbore design drilling operation new prediction model specific energy rop reservoir characterization equation penetration fractal theory drilling parameter upstream oil & gas rock fragmentation ARMA 15-518 A New...

... 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...

... the concept of Drilling Specific Energy (DSE) was later developed to apply the hydraulics parameters into the drilling performance optimization. With respect to the purpo e of mineral exploration, coiled tube (CT) Turboclrilling ha be n propos d r c nlly for d ep hard rocks mineral exploration applications...

... to describe the effects of both the cutting geometry and the intrinsic rock properties. The proposed model is validated by single cutter test results on Carthage limestone specimens under 13.8MPa confining pressure. It is then used to study the variation of mechanical specific energy with cutting geometry...

... ABSTRACT: The relationship between Mechanical Specific Energy (MSE) and the rate of penetration (ROP), or the depth of cut per revolution, provides an important measure for strategizing a desirable drilling operation. The ROP of drilling can be related to the depth of cut for a single cutter...

...: a pyramidal surface in 45 degrees with the rock surface to cut). It was found that the pyramid pick P1 can produce the largest fragments and consumes the least specific energy. With increasing the depth of cut, the specific energy decreases for all picks. It was also found that in all the cases...

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

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

... area of the cut (the coefficient of proportionality is referred to as the intrinsic specific energy S) and that the inclination ? of the cutting force is controlled by a uniform frictional process between the failed material and the cutting face. However, the results reported in this paper clearly show...