Results 21 to 30 of about 267,136 (314)
Molecules, 2022 During drilling in deep shale gas reservoirs, drilling fluid losses, hole wall collapses, and additional problems occur frequently due to the development of natural fractures in the shale formation, resulting in a high number of engineering accidents ...
Xiangwei Kong +7 more
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Energy Efficiency Improvements in Dry Drilling with Optimised Diamond-Like Carbon Coating [PDF]
, 2008 We demonstrate enhancements of performance and energy efficiency of cutting tools by deposition of diamond-like carbon (DLC) coatings on machine parts. DLC was deposited on steel drill bits, using plasma enhanced chemical vapour deposition (PECVD) with ...
A.W. Anson +16 more
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Drilling tool geometry evaluation for reinforced composite laminates [PDF]
, 2010 In this work, a comparative study on different drill point geometries and feed rate for composite laminates drilling is presented. For this goal, thrust force monitoring during drilling, hole wall roughness measurement and delamination extension ...
Albuquerque, Victor Hugo C. de +5 more
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Rudarsko-geološko-naftni Zbornik, 2021 Rock drilling is the process of penetrating and crushing rocks, which is characterized by the low rate of penetration (ROP) and drilling rate because of the amount of cuttings that remain in the drilling environment and the thermal stresses generated at ...
Shahrokh Khosravimanesh +3 more
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Multi-objective cellular particle swarm optimization and RBF for drilling parameters optimization
Mathematical Biosciences and Engineering, 2019 Wellbore drilling parameters optimization is one of the most important issue in drilling engineering. Rate of penetration or mechanical specific energy was usually utilized as the optimization objective.
Jun Zheng, Zilong li, Bin Dou, Chao Lu
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Rig Rates and Drilling Speed: Reinforcing Effects [PDF]
SSRN Electronic Journal, 2016 This paper studies how drilling costs are affected by the business cycle. We decompose the major elements in these costs rig rates and drilling speed - and examine how they interact with variations in oil prices. A highly relevant consideration in the current circumstances is whether oil companies can compensate for falling oil prices not only by ...
Osmundsen, Petter, Roll, Kristin Helen
openaire +2 more sources
Determination of the suitable drilling operating parameters in different geological formations El-Sharara Oil Field (South-Western Libya) [PDF]
, 2018 Purpose. The objective of this study is to determine the best operating conditions for the most notable drilling parameters (i.e. weight on bit (WOB), rotary drilling speed (RPM), and characteristics of drilling fluid) using field data obtained from El-
Abdellah, W, Boghdady, G, Sayed, M
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Soluble pozzolanic materials from coal bottom ash as cement replacement material [PDF]
, 2021 Nowadays, intensive research in production of highly reactive pozzolanic materials from industrial waste to replace cement is crucial. This action expected to increase industrial waste recycling rate and at the same time reduce extraction of non ...
Abd Wahab, Azrina +3 more
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Drilling rate changes when air drilling is switched to mist drilling. [Claystone] [PDF]
, 1977 Eight shallow (30-foot-deep) holes were drilled in four formations to determine if the reduction in penetration rate that usually occurs when air drilling is changed to mist drilling might be due to the physical action of drilling a wet, soapy rock. The results showed an average loss of 9.3%, with the greatest loss occurring in limestone.
openaire +2 more sources
Experimental research into the effect of some operation factors and rock properties on the rate of penetration [PDF]
, 2020 Purpose. The purpose of this research is to investigate the effect of weight on bit (WOB), rotary speed (RPM), and some rock properties on the rate of penetration (ROP). Methods.
Ali, Mahrous A.M. +4 more
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