Results 161 to 170 of about 1,486,164 (204)

Experiments on Specific Energy and Pulping Quality of Extrusion Mechanical Pulping

Key Engineering Materials, 2011
In order to select rational screw parameters for improving the pulping quality, efficiency and reducing specific energy, the paper studied the effects of the rotational speed of screw, lead number of reverse thread and slot width of reverse flight of the twin screw pulping extruder (TSPE) on specific energy, flux and pulping quality (reject rate, fiber
Xiao Yang Shen, Ping Wang, June Zhang, Gao Sheng Wang   +3 more
openaire   +1 more source

Theories and Applications of Pulsed-Jet Drilling With Mechanical Specific Energy

SPE Journal, 2016
Summary Mechanical specific energy (MSE) is the amount of energy required to destroy a unit volume of rock. The main work of this study is to bring the hydraulic energy of a pulsed jet into an MSE model and further analyze the mechanism of improving the rate of penetration (ROP) for pulsed-jet drilling on the basis of the model ...
Wei Minghui, Li Gensheng, Shi Huaizhong, Shi Shuaishuai, Li Zhaokun, Zhang Yi   +5 more
openaire   +1 more source

Determination of Specific Mechanical Energy Distribution on a Twin-Screw Extruder

Journal of Agricultural Engineering Research, 1997
The distribution of specific mechanical energy (SME) dissipated inside a co-rotating, self-wiping, twin-screw extruder was estimated by conducting energy balances on each zone of the extruder. SME dissipation was studied under three different steady state conditions in which the zone before the die was kept adiabatic or under constant cooling or under ...
S Godavarti, MV Karwe
openaire   +1 more source

Facts, Fallacies and Pitfalls of Using Mechanical Specific Energy (MSE) – Part 1

SPE/IADC International Drilling Conference and Exhibition, 2023
Abstract Over the years, some researchers have used Mechanical Specific Energy (MSE), which is said to represent the amount of energy needed to drill a unit volume of rock, to quantify drilling efficiency. MSE was originally introduced by Teal for the mining industry in 1964.
Robello Samuel, Graham Mensa-Wilmot
openaire   +1 more source

Mechanical Specific Energy for Drilling Optimization in Deepwater Brazilian Salt Environments

IADC/SPE Asia Pacific Drilling Technology Conference, 2016
Abstract Operators exploring presalt areas report issues with bottomhole assembly (BHA) wear and failure resulting from factors such as vibrations, stick-slip, and torsional resonance during drilling operations in salt layers. This study presents a new real-time analysis based on geomechanics capability to optimize energy consumption and
C. N. Pinto, A. L. Lima
openaire   +1 more source

Differential Specific Mechanical Energy as a Quality Parameter in Racing Alpine Skiing

Journal of Applied Biomechanics, 2008
An important question in alpine skiing is how to determine characteristics of well-performed ski turns, an issue that has become more crucial with the arrival of new carving skis. This article introduces a new method for estimating the quality of skiing at each point of observation based on mechanical energy behavior that can be measured using ...
openaire   +2 more sources

Fracture mechanics applications of absorbed specific fracture energy: Notch and unnotched specimens

Theoretical and Applied Fracture Mechanics, 1985
Abstract The Absorbed Specific Fracture Energy (ASFE) ∗ is an energy criterion that may be applied to evaluate the embrittlement and fracture properties of low and medium strength structural materials. Some new results are presented to illustrate the application of ASFE, and relating them to the other fracture criteria such as J1c and K1c.
F. Gillemot, E. Czoboly, I. Havas
openaire   +1 more source

Mechanical Specific Energy: Derivation, Understanding and Relationship to Formation Strength

SPE/IADC International Drilling Conference and Exhibition
Abstract The Mechanical Specific Energy (MSE) model is used widely in the drilling industry. However, its use has been questioned in a two-part series in the SPE-IADC Drilling Conference, "Mechanical Specific Energy (MSE): Claims and Implications – Facts, Fallacies, and Pitfalls" (Samuel and Mensa-Wilmot, 2023 SPE 212508, 2024 SPE 217727)
openaire   +1 more source

Specific economic regulation mechanisms of investment in new energy infrastructure

2018
Energy infrastructure operators are characterized by capital intensity and long periods of return on investment. In order for the price of use of the infrastructure to be within a reasonable frame, the regulatory framework should define appropriate and efficient methods of economic regulation.
Šimurina, Jurica, Gelo, Tomislav
openaire   +2 more sources

Relation Between the Mechanical Specific Energy, Cuttings Morphology, and PDC Cutter Geometry

Volume 5: Materials Technology; Petroleum Technology, 2014
This paper discusses a series of experiments performed on Carthage Marble Limestone rock samples in a high pressure single PDC cutter testing facility. The tests were performed at 450 psi confining pressure conditions and four different cutters were used. Two different cutter diameter sizes of 13 mm and 16 mm, each with two different chamfer sizes of 0.
Babak Akbari, Stefan Miska, Mengjiao Yu, Evren Ozbayoglu   +3 more
openaire   +1 more source