Results 231 to 240 of about 388,588 (308)

Prediction of drilling rate of penetration (ROP) using hybrid support vector regression: A case study on the Shennongjia area, Central China

Journal of Petroleum Science and Engineering, 2019
Rate of penetration (ROP) prediction is crucial for the optimization and control in drilling process due to its vital role in maximizing the drilling efficiency.
Chao Gan, Weihua Cao, Min Wu, Xin Chen, Hu Yule, Kang‐Zhi Liu, Fawen Wang, Suo-Bang Zhang   +7 more
semanticscholar   +1 more source

Rate of penetration (ROP) optimization in drilling with vibration control

Journal of Natural Gas Science and Engineering, 2019
Drilling optimization is typically tackled by optimizing the rate of penetration (ROP). However, most ROP optimization models do not consider the effect of drilling vibrations, a major ROP inhibitor.
C. Hegde, H. Millwater, M. Pyrcz, H. Daigle, K. Gray   +4 more
semanticscholar   +1 more source

Drilling Rate of Penetration Prediction of High-Angled Wells Using Artificial Neural Networks

Journal of energy resources technology, 2019
Predicting the rate of penetration (ROP) is a significant factor in drilling optimization and minimizing expensive drilling costs. However, due to the geological uncertainty and many uncontrolled operational parameters influencing the ROP, its prediction
A. Abbas, Salih A. Rushdi, M. Alsaba, M. A. Dushaishi   +3 more
semanticscholar   +1 more source

Predicting rate of penetration during drilling of deep geothermal well in Korea using artificial neural networks and real-time data collection

Journal of Natural Gas Science and Engineering, 2019
We present a feasibility assessment of predicting the rate of penetration (ROP) during wellbore drilling using data obtained as the drilling progresses within a given well.
M. Diaz, Kwang Yeom Kim, H. Shin, L. Zhuang   +3 more
semanticscholar   +1 more source

A Robust Rate of Penetration Model for Carbonate Formation

Journal of energy resources technology, 2018
During the drilling operations, optimizing the rate of penetration (ROP) is very crucial, because it can significantly reduce the overall cost of the drilling process. ROP is defined as the speed at which the drill bit breaks the rock to deepen the hole,
A. Al-Abduljabbar, S. Elkatatny, M. Mahmoud, K. Abdelgawad, Abdulaziz Al-Majed   +4 more
semanticscholar   +1 more source

Optimising casing milling Rate Of Penetration (ROP) by applying the concept of Mechanical Specific Energy (MSE): a justification of the concept's applicability by literature review and a pilot study

Journal of Petroleum Science and Engineering, 2019
The concept of mechanical specific energy (MSE) by Teale (1965) helps to increase the instantaneous rate of penetration (ROP). It has been adopted by the oil and gas industry for well drilling and has been improved mathematically in recent years by ...
Rudolf Suppes, A. Ebrahimi, J. Krampe
semanticscholar   +1 more source

The Influence of Penetrative Trauma on the Rate of Decomposition*^†

Journal of Forensic Sciences, 2010
Abstract:  An understanding of the factors affecting decomposition is important for the accurate estimation of postmortem interval. An experimental study on the influence of penetrating trauma on decomposition rate was carried out using the domestic pig, Sus scrofa.
Peter, Cross, Tal, Simmons
openaire   +2 more sources

Comparative rates of dermal penetration of insecticides in mice

Toxicology and Applied Pharmacology, 1981
Abstract Dermal penetration of 14 radiolabeled insecticides into ICR mice was studied. Permethrin penetrated most rapidly ( T 0.5 = 5.9) while malathion penetrated least rapidly ( T 0.5 = 130 min). Within 5 min after application some toxicants were in the blood, and measurable quantities of radioactivity from the majority of toxicants tested were
P V, Shah, R J, Monroe, F E, Guthrie
openaire   +2 more sources

Water vapor penetration rate into enclosures with known air leak rates

IEEE Transactions on Electron Devices, 1978
The rate at which water vapor penetrates a faulty seal in a "hermetically sealed" device has been examined both experimentally and theoretically in this study. The experimental data was generated by studying the rate of moisture ingress into two types of packages; a TO-5 can and a 1/4 × 1/4 inch ceramic flatpak.
Aaron DerMarderosian, Vincent Gionet
openaire   +1 more source

Mass Customization and “Forecasting Options’ Penetration Rates Problem”

Operations Research, 2019
Summary: Auto manufacturers produce a very large number of feasible configurations that make it impossible to forecast the demand of individual configurations. What the companies do forecast is the penetration rate of each option, which is the percentage of cars that include that option.
Ali Fattahi, Sriram Dasu, Reza H. Ahmadi
openaire   +2 more sources