Results 11 to 20 of about 915,295 (349)
Drilling Rate of Penetration Prediction Based on CBT-LSTM Neural Network [PDF]
SensorsDue to the uncertainty of the subsurface environment and the complexity of parameters, particularly in feature extraction from input data and when seeking to understand bidirectional temporal information, the evaluation and prediction of the rate of ...
Kai Bai +3 more
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Rate of Penetration Prediction Method for Ultra-Deep Wells Based on LSTM–FNN
Applied Sciences, 2022 The drilling process is complex, especially for ultra-deep wells, which face the problems of high temperature, high pressure and poor drilling resistance in their formation.
Hongtao Liu +3 more
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Real-Time Minimization of Mechanical Specific Energy with Multivariable Extremum Seeking
Energies, 2021 Drilling more efficiently and with less non-productive time (NPT) is one of the key enablers to reduce field development costs. In this work, we investigate the application of a data-driven optimization method called extremum seeking (ES) to achieve more
Magnus Nystad +2 more
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Root growth and soil nitrogen depletion by onion, lettuce, early cabbage and carrot [PDF]
, 2001 Experiments examining root growth, the utilization of N and the effect of green manures were carried out on four vegetable crops. Large differences were observed both in rooting depth penetration rates, and in final rooting depth and distribution.
Thorup-Kristensen, K.
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Gels, 2023 In this study, the reservoir drill-in fluid (RDF) was modified and optimized to improve the rheological properties and reduce the filtration properties of the drilling fluid used for drilling the oil-bearing zone horizontally.
Neamat Jameel, Jagar A. Ali
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Rates of penetration of fixing fluids [PDF]
American Journal of Anatomy, 1960 No Abstract.
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Role of Air in Granular Jet Formation [PDF]
, 2007 A steel ball impacting on a bed of very loose, fine sand results in a surprisingly vigorous jet which shoots up from the surface of the sand [D. Lohse et al., Phys. Rev. Lett. 93, 198003 (2004)].
Bergmann, Raymond +4 more
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Penetration Rates of Formaldehyde [PDF]
Microscopy Today, 2002 Abstract Formaldehyde is one of the most rapidly penetrating fixatives used. Unfortunately, it is one of the slowest to fix tissue. This paradox was finally explained by Burnett in 1982. An fine description of the properties of formaldehyde may be found in John Kiernan's book.
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Theoretical Lidar Point Density for Topographic Mapping in the Largest Scales [PDF]
, 2010 When ordering LiDAR data, LiDAR point density per surface unit is important information with decisive influence on the price of the LiDAR survey. The paper first deals with the theoretical calculation of the minimum LiDAR point density, necessary for the
Crosilla, Fabio +2 more
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Study on Drill String Stick-slip Vibration Pattern Under Bit-Rock Interaction
Shiyou jixie, 2023 Stick-slip vibration leads to high-frequency shear stress on drill string and premature fatigue of drill string.Therefor,the torsional vibration model of drill string system considering bit-rock interaction was built by coupling the bit-rock interaction ...
Xing Xuesong +4 more
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