نتایج جستجو برای: conventional drilling

تعداد نتایج: 270548  

2009
SORIN DAN GRIGORESCU OCTAVIAN MIHAI GHITA

– World wide drilling is developing for oil, gas or water resources. Electric motors power 75% of the total drilling rigs installation, augmenting to 95% for the case of Romania. Monitoring diesel generators micro-power station and motors of the rig is the second important thing to do and complete the main task of drilling process monitoring. This paper describe a monitoring and control system ...

2014
Jinsheng Cui Xuyan Hou Deming Zhao Yousong Hou Qiquan Quan Xiang Wu Zongquan Deng Shengyuan Jiang Dewei Tang

Drilling samples of lunar soil is an important and indispensable part of China’s lunar exploration project. The drill bit temperature during the drilling process is one of the key concerns for scholars, especially for the hard lunar rock drilling in vacuum. In this article, the simulation analysis of drilling in atmosphere and vacuum is conducted. Moreover, a fiber grating temperature measuring...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده فنی 1391

the study of air infiltration into the buildings is important from several perspectives that may be noted to energy and design of hvac systems, indoor air quality and thermal comfort and design of smoke control systems. given the importance of this issue, an experimental and numerical study of air infiltration through conventional doors and windows has been explored in iran. to this end, at fir...

2005
B. Glass H. Cannon S. Hanagud J. Frank

Future in-situ lunar/martian resource utilization and characterization, as well as the scientific search for life on Mars, will require access to the subsurface and hence drilling. Drilling on Earth is hard – an art form more than an engineering discipline. The limited mass, energy and manpower in planetary drilling situations makes application of terrestrial drilling techniques problematic. Th...

2009
H. Hocheng C. C. Tsao

Delamination is one of the most concern defects in drilling of composite material. Delamination depends on the factors such as feed rate, tool geometry and wear. The mechanics of drilling composite materials has been examined along with the quality of the hole and the effect of tool design parameters. The capacity of computerized tomography (CT) showing sample cross-section in a nondestructive ...

2015
H. ABDULLAH R. RAMLI D. A. WAHAB J. A. QUDEIRI

In recent years, the productivity of machine tools has been significantly improved by using computer-based CAD/CAM systems for Computer Numerical Control (CNC). Various types of CAM software in the market that provide tool path programming and can be applied for different types of the machining process such as drilling, milling, and turning. However, sometimes the default tool path generated in...

2004
Y. Bar-Cohen S. Sherrit Z. Chang L. Wessel X. Bao P. T. Doran C. H. Fritsen F. Kenig C. P. McKay A. Murray T. Peterson

There is growing evidence for ice and fluids near the surface of Mars with potential discharge of brines, which may preserve a record of past life on the planet. Proven techniques to sample Mars subsurface will be critical for future NASA astrobiology missions that will search for such records. The required technology studies are underway in the McMurdo Dry valleys, Antarctica, which is serving...

2008
S. Hanagud S. Statham G. Paulsen

Introduction: Commercial drilling, even deep-sea or remote, depends on human teleoperation. Lightspeed delays mean that coring and drilling beyond the Moon requires automation in order to not get stuck or risk mission failure. The Drilling Automation for Mars Exploration (DAME) is a NASA project for developing critical-path drilling software technologies. The DAME project’s purpose was to devel...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2007
Jefferson W Tester Brian J Anderson Anthony S Batchelor David D Blackwell Ronald DiPippo Elisabeth M Drake John Garnish Bill Livesay Michal C Moore Kenneth Nichols Susan Petty M Nafi Toksoz Ralph W Veatch Roy Baria Chad Augustine Enda Murphy Petru Negraru Maria Richards

Recent national focus on the value of increasing US supplies of indigenous renewable energy underscores the need for re-evaluating all alternatives, particularly those that are large and well distributed nationally. A panel was assembled in September 2005 to evaluate the technical and economic feasibility of geothermal becoming a major supplier of primary energy for US base-load generation capa...

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