Results 201 to 210 of about 527,112 (222)
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Reverse Circulation Underreaming Utilizing Air Lift
SPE California Regional Meeting, 1979Abstract This paper focuses on a new application of underreaming a well bore utilizing an air lift reverse circulation drilling system to increase reservoir production. The theory used and the equipment built thus far is presented and discussed. presented and discussed.
W.W. Bishop, R.J. Hand, G.S. Perking
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Circulating reverse triiodothyronine in humans during exercise
European Journal of Applied Physiology and Occupational Physiology, 1981Circulating thyroxine (T4), triiodothyronine (T3) and reverse triiodothyronine (rT3) as well as blood lactate and glucose concentrations were measured in a group of 12 trained volunteer subjects prior to and after swimming 0.18 or 0.9 km, to determine if increase in metabolic activity was accompanied by diversion of T4 monodeiodination from the active (
B. N. Premachandra +4 more
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Journal of Mathematical Physics, 2021
In this article, we study the fluctuations of linear eigenvalue statistics of reverse circulant (RCn) and symmetric circulant (SCn) matrices with independent entries that satisfy some moment conditions. We show that 1nTrϕ(RCn) and 1nTrϕ(SCn) obey the central limit theorem type result, where ϕ is a polynomial test function.
Shambhu Nath Maurya, Koushik Saha
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In this article, we study the fluctuations of linear eigenvalue statistics of reverse circulant (RCn) and symmetric circulant (SCn) matrices with independent entries that satisfy some moment conditions. We show that 1nTrϕ(RCn) and 1nTrϕ(SCn) obey the central limit theorem type result, where ϕ is a polynomial test function.
Shambhu Nath Maurya, Koushik Saha
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Research and Application of Reverse Circulation Drilling Technology
Proceedings of International Oil & Gas Conference and Exhibition in China, 2006Abstract The reverse circulation drilling technology is that drilling fluid is pumped down to the annulus, through drill bit and inside of the drilling tool, comes back to the ground. It has many advantages, such as reducing the formation leakage, protecting the oil and gas formation, and cutting sample very clear etc.
Kefu Li +3 more
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Reversible Cessation of Blood Circulation in Deep Hypothermia
Journal of Applied Physiology, 1958In rats at body temperatures below 15℃, the arterial pressure reflected immediately the temperature of the heart.
E. F. Adolph, S. Klem, L. B. Morrow
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1964
Reverse-circulation drilling is designed specifically for the construction of production water wells, but is readily adaptable to soil exploration uses, foundation projects, and underwater drilling. The method is an adaptation of the dredge to vertical holes, which permits construction of moderate to large diameter holes of any depth to several hundred
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Reverse-circulation drilling is designed specifically for the construction of production water wells, but is readily adaptable to soil exploration uses, foundation projects, and underwater drilling. The method is an adaptation of the dredge to vertical holes, which permits construction of moderate to large diameter holes of any depth to several hundred
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The Optimization Program of Reverse Circulation Drilling Equipment
Advanced Materials Research, 2013Based on the analysis of the problems about the reverse circulation drilling in the practical application, such as the ability of the drilling depth, application in the loose layer, the construction of the pile hole with large diameter, three optimization programs are put forward, and evaluated in combination with the project examples of Wuhan ...
Xiao Hui Xue, Zhong Ming Su
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Reverse circulation bit fluid field calculation
2009 International Conference on Image Analysis and Signal Processing, 2009Air drive reverse circulation bit interior fluid field analysis has relied on experiments for a long time. With the development of the computer, numerical simulation and emulation software brought many advantages contrasting the experiment. However, due to the complexity of the interior fluid field, few people have done the resolution calculation for ...
Hongwei Huang, Kun Yin, Shu-qing Hao
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Reversible Stoppage of the Blood Circulation in Sabellids
Nature, 1933SABELLIDS are marine polychaete worms, the blood system of which is peculiar, both anatomically and physiologically. Numerous capillaries are present, in the body wall, in the branchial crown, and projecting freely into the body cavity, all of them ending blindly. Most of the blood vessels in the body contract rhythmically.
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Influence of Substrate Conductivity on Circulation Reversal in Evaporating Drops
Physical Review Letters, 2007Nonuniform evaporation from sessile droplets induces radial convection within the drop, which produces the well-known "coffee-ring" effect. The evaporation also induces a gradient in temperature and consequently a gradient in surface tension, generating a Marangoni flow.
C. Domingues +4 more
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