نتایج جستجو برای: geometrical drilling

تعداد نتایج: 41314  

2009
Anna I. Rissman Bob Mau Bryan S. Biehl Aaron E. Darling Jeremy D. Glasner Nicole T. Perna

SUMMARY Mauve Contig Mover provides a new method for proposing the relative order of contigs that make up a draft genome based on comparison to a complete or draft reference genome. A novel application of the Mauve aligner and viewer provides an automated reordering algorithm coupled with a powerful drill-down display allowing detailed exploration of results. AVAILABILITY The software is avai...

Journal: :international journal of nano dimension 0
e. kasiralvalad science and research branch, islamic azad university, faculty of petroleum engineering, daneshgah blvd, simon bulivar blvd, tehran, iran.

the continuous development of global economy with decreasing in available hydrocarbon sources and increasing discovery and extraction costs due to decrease in-situ oil and gas reservoir, displays the necessity of using new techniques for the improve rate of penetration and productivity in well. nanotechnology has already contributed significantly to technological advances in the energy industri...

Journal: :Acta of bioengineering and biomechanics 2013
Faruk Karaca Bunyamin Aksakal

Due to temperature increase during bone drilling, bone necrosis is likely to occur. To minimize bone tissue damage during drilling, a detailed in vitro experimental study by using fresh calf cortical bones has been performed with various combined drilling parameters, such as: drilling environment, drill diameter, drill speed, drill force, feed-rate and drill coating. Bone temperatures at the dr...

2018
Amir Hossein Ghasemi Amir Mahyar Khorasani Ian Gibson

Drilling is one of the most useful metal cutting processes and is used in various applications, such as aerospace, electronics, and automotive. In traditional drilling methods, the thrust force, torque, tolerance, and tribology (surface roughness) are related to the cutting condition and tool geometry. In this paper, the effects of a pre-center drill hole, tool material, and drilling strategy (...

2013
Bingren Wang Zehua Wang Yuxue Sun Jiuzhou Sun

Formate drilling and completion fluid system is a new type of clean organic salt brine system which has been developed from inorganic salt brine drilling fluid system. It is beneficial to protecte and find hydrocarbon reservoir. Due to the solid free system, the damage of solid phase particles on reservoir, especially low permeability oil and gas layer, can be greatly eliminated, at the same ti...

2002
V. S. Zagorodnov

Environmental impact is a primary criterion for selecting any liquid used for filling boreholes in glaciers. Antifreeze solutions based on ethanol and other high molecular weight alcohols are among several potential fluids used for drilling deep holes in the Arctic and Antarctic glaciers. At relatively high ice temperatures in boreholes, the concentration of ethanol in the solution can be low. ...

2006
W. Qian B. Milkereit J. Kück

1830. [2] Milkereit B., et al. (2006) this volume. [3] Plado J., et al (2002) Meteoritics & Planetary Science, 35, 723-732. [4] Brown M. et al. (2006) this volume. Acknowledgement: Drilling was funded by ICDP, the U.S. NSF, the Austrian FWF, the Canadian NSERC, and the Austrian Academy of Sciences. Drilling operations were performed by DOSECC. Local help by the Geological Survey Department (Acc...

1999
John R. Smith Vittorio Castelli Chung-Sheng Li

Enabling the e cient storage, access and retrieval of large volumes of multi-dimensional data is one of the important emerging problems in databases. We present a framework for adaptively storing, accessing, and retrieving large images. The framework uses a space and frequency graph to generate and select image view elements for storing in the database. By adapting to user access patterns, the ...

2007
Karl-Petter Lindegaard Thor I. Fossen

We propose a scalable state estimator with wave filter for surface vessels. The filter is shown to be either globally or locally exponentially stable depending on configuration. Performance is illustrated using actual data from a full scale semi-submersible drilling rig.

The rheological regulation of the “three high” (high temperature, high density and high salinity) water-based drilling fluid is a worldwide problem due to the combined influence of temperature, solid content and salinity. This paper investigates the factors and regulation methods about rheological property of “three high” water based drilling fluid, and the effects of clay, salinity and weighti...

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