Application of Laser and Plasma for Thermal Assisted Drilling in Carbonated Formations

2021 ◽  
Author(s):  
Mohsen Bazargan
Keyword(s):  
Experimental Study ◽  
Plasma Torch ◽  
Present Report ◽  
Wellbore Stability ◽  
Thermal Impact ◽  
Numerical Investigations ◽  
Underbalanced Drilling ◽  
Managed Pressure Drilling ◽  
Drilling Method ◽  
Experimental Findings

Abstract Employing novel drilling, and tunneling methods are active area of study since 1930s. In the present report, an Experimental study of the thermal impact of laser and plasma torch on carbonated rocks as part of thermal assisted drilling operation is presented. The experimental findings are then evaluated and verified by the Kirch's equations for stresses and strains around a cylindrical borehole. Since it is vital to carefully studying the wellbore stability in this type of drilling method, especially if it is associated with underbalanced drilling (UBD) and or Managed pressure drilling (MPD), further numerical investigations are carried out to highlight the necessary considerations in this regard.

scholarly journals Experimental and numerical investigations of oxide-related defects in Al alloy gravity die castings

2021 ◽  
Author(s):  
Giulia Scampone ◽  
Raul Pirovano ◽  
Stefano Mascetti ◽  
Giulio Timelli
Keyword(s):  
Fluid Dynamic ◽  
Casting Process ◽  
Numerical Code ◽  
Al Alloy ◽  
Numerical Investigations ◽  
Die Casting Process ◽  
Experimental Findings ◽  
Die Castings ◽  
Filling And Solidification ◽  
Image Analysis Techniques

AbstractThis research aimed to study the formation and distribution of oxide-related defects in the gravity die casting process of an AlSi7Cu0.5Mg alloy by using experimental and numerical investigations. Metallographic and image analysis techniques were conducted to map the distribution of oxide inclusions inside the casting at the microscopic level. Numerical simulations were used to analyse the filling and solidification stages, and to foresee the turbulence of the melt and the formation of the oxide defects. The results show that most of the defects were correlated with the oxide layers or bubbles entrained inside the liquid metal. The accuracy of the numerical code in simulating the metal fluid-dynamic behaviour and the heat transfer was verified, and the results were in agreement with the experimental findings. The numerical distribution of defects was consistent with the experimental results, proving that the model successfully predicted the formation of oxide-related defects.

The Effect of Distraction on Schizophrenic Performance (2) Psychomotor Ability

1965 ◽  
Vol 111 (474) ◽  
pp. 391-398 ◽  
Author(s):  
Andrew McGhie ◽  
James Chapman ◽  
J. S. Lawson
Keyword(s):  
Present Report ◽  
Sensory Modality ◽  
Preceding Paper ◽  
Auditory Distraction ◽  
Psychomotor Tests ◽  
Motor Responses ◽  
Wide Range ◽  
Schizophrenic Patients ◽  
Psychomotor Ability ◽  
Experimental Findings

In the preceding paper the effect of experimental distraction was examined and the findings discussed. The present report is concerned with a similar study of the effect of distraction on tests which involve another aspect of schizophrenic performance, that of psychomotor ability. Earlier studies (Chapman and McGhie, 1961, 1962) produced both clinical and experimental evidence that auditory distraction disrupted the motor responses of some schizophrenic patients. As the previous experimental findings were based on two tests involving only very limited areas of psychomotor performance, it was necessary to examine patients on a wide range of psychomotor tests. A second aim of the present investigation was to assess any differential effects due to variation in the sensory modality of the distracting stimuli.

An Experimental Study to Demonstrate that Nanoparticles can Filter into Shale Formations and Improve Wellbore Stability

2020 ◽  
Author(s):  
Nancy Zhou ◽  
Yongkang Wu ◽  
Meng Lu ◽  
Yucheng Li ◽  
Fuchen Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Wellbore Stability ◽  
Shale Formations

Experimental study on the jet characteristics of a steam plasma torch

2018 ◽  
Vol 20 (12) ◽  
pp. 125401
Author(s):  
Fangyuan LIU ◽  
Deping YU ◽  
Cheng LV ◽  
Yazhou DUAN ◽  
Yanjie ZHONG ◽  
...  
Keyword(s):  
Experimental Study ◽  
Plasma Torch ◽  
Jet Characteristics ◽  
Steam Plasma

scholarly journals Environmental influences on propagation of explosive wave on the dynamic response of plate

2014 ◽  
Vol 62 (3) ◽  
pp. 423-429
Author(s):  
W. Barnat
Keyword(s):  
Shock Wave ◽  
Experimental Study ◽  
Dynamic Response ◽  
Environmental Impacts ◽  
Environmental Influences ◽  
Commercial Software ◽  
Test Plate ◽  
Numerical Investigations ◽  
Explosive Wave ◽  
Explosive Device

Abstract The purpose of this article is to present the influence of the environment on the propagation of a shock wave and the dynamic response of the plate load by a shock wave. In the course of research in this field an experimental study was performed. An experimental study concerns the test plate loaded by a shock wave, formed after the detonation of an explosive device with equivalent weighing of TNT equal to 1 kg. During numerical investigations environmental impacts have been tested on the dynamic response disc. The considered environments of explosions were air water and soil. A model of the phenomenon has been prepared using commercial software MSC DYTRAN.

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