Results 261 to 270 of about 1,500,948 (299)

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

Drilling Dynamics, Mechanical Specific Energy Data Help Drill Record Extended-Reach Well

Journal of Petroleum Technology, 2021
This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 203335, “Using MSE and Downhole Drilling Dynamics in Achieving a Record Extended-Reach Well Offshore Abu Dhabi,” by Nashat Abbas and Jamal Al Nokhatha, ADNOC, and Luis Salgado, Halliburton, et al., prepared for the 2020 Abu Dhabi International Petroleum ...
openaire   +1 more source

Pore-Pressure Estimation by Use of Mechanical Specific Energy and Drilling Efficiency

SPE Drilling & Completion, 2017
Summary Estimates of formation pore pressure before and while drilling are important inputs for well planning and operational decision making. A method is proposed to determine pore pressure from a combination of downhole drilling-mechanics parameters and in-situ rock data with the concept of mechanical specific energy ...
Reza Majidi, Martin Albertin, Nigel Last
openaire   +1 more source

Improved Calculation Model of Mechanical Specific Energy Based on Single-Cutter Rock-Breaking Mechanism

SPE Journal
Summary As oil and gas exploration progresses to ultradeep and 10 000-m depths, insufficient energy supply during rock breaking by downhole polycrystalline diamond compact (PDC) bits presents a critical challenge. Quantifying the energy consumed in PDC cutter/rock interactions is therefore essential for enhancing bit efficiency and ...
Jiusen Wei, Guangqing Zhang, Wei Liu, Deli Gao   +3 more
openaire   +1 more source

Method for Pore Pressure Estimation Using Mechanical Specific Energy and Drilling Efficiency

IADC/SPE Drilling Conference and Exhibition, 2016
Abstract Pre-drill prediction of formation pore pressure and pressure detection while drilling to recognize deviations from the expected pressure are important inputs for well planning and operational decision making. A method is proposed to determine pore pressure from a combination of downhole drilling mechanics ...
Reza Majidi, Martin Albertin, Nigel Last
openaire   +1 more source