scholarly journals Experimental Setup for Swellable Elastomers in Cased and Open Holes

2021 ◽  
Author(s):  
Sayyad Zahid Qamar ◽  
Maaz Akhtar ◽  
Tasneem Pervez
Keyword(s):  
Full Scale ◽  
Experimental Setup ◽  
Well Bore ◽  
Test Setup ◽  
Testing Scheme ◽  
Open Hole ◽  
Actual Formation ◽  
The Way

A full scale experimental setup was designed and commissioned for testing of swelling elastomer seals against a casing (cased hole) and formation (open hole). Actual replicate of wellbore was designed with varying inside diameters and roughness to reproduce the effect of actual formation. The Dynaset packer mounted on a 7-inch tubular was allowed to swell against a 9–5/8-inch casing, while the fast swell packer mounted on a 9–5/8-inch tubular was allowed to swell against the 12–1/4-inch replicated well bore. This one-of-its-kind test setup can demonstrate the way the elastomers swell out and fill the asperities against smooth outer casing (cased hole) or against rough wellbore surface (open hole). Dismantling of the test setup midway through the testing scheme revealed a severely dimpled surface of the swelled elastomer.

scholarly journals FIRE DYNAMICS IN FAÇADE FIRE TESTS, Measurement, modeling and repeatability

2016 ◽  
Author(s):  
Johan Anderson ◽  
Lars Boström ◽  
Robert Jansson ◽  
Bojan Milovanović
Keyword(s):  
Test Specimen ◽  
Heat Exposure ◽  
Full Scale ◽  
Experimental Setup ◽  
Fire Tests ◽  
Fire Dynamics ◽  
Test Set ◽  
Set Up

Presented is a comparison between full-scale façade tests where SP Fire 105 and BS 8414-1 were used regarding repeatability and the use of modelling to discern changes in the set-ups. Results show that the air movements around the test set-up (the wind) may have a significant impact on the tests and that the heat exposure to the façade surface will among other depend on the thickness of the test specimen. Also demonstrated was that good results could be obtained by modelling of the façade fire tests giving us the opportunity to use these methods to determine the effect of a change in the experimental setup.

Design of an Experimental Setup to Investigate an Oscillating and Evaporating Meniscus Using a Feedback Control Loop

2016 ◽  
Author(s):  
Alyssa Recinella ◽  
Joseph Baldwin ◽  
Charles Krouse ◽  
Robert Walkowiak ◽  
Pruthvik Raghupathi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Contact Line ◽  
Experimental Test ◽  
Heated Surface ◽  
Nucleate Boiling ◽  
Injection System ◽  
Experimental Setup ◽  
Test Setup ◽  
Liquid Injection ◽  
Liquid Displacement

Nucleate boiling is one of the most efficient methods to dissipate heat. However, the complex physics of heat transfer near the contact line is not well understood. Due to the difficulty in measuring and analyzing heat transfer around a bubble at high heat fluxes, novel approaches must be taken. This paper focuses on the design of an experimental setup used to simulate heat transfer at the contact line by studying an oscillating meniscus on a heated surface. A preliminary design of the experimental test setup is described in this paper. The experimental test setup will be composed of a liquid injection system with a needle, an oscillator, a heated surface, and a sensor to measure the meniscus volume. A feedback loop will be used to control the liquid injection system and prevent dry out or flooding during evaporation. Furthermore, a conic speaker will be used to induce oscillations at a range of 10–200 Hz. These oscillations simulate liquid displacement during bubble nucleation, growth, and bubble departure. Finally, a sensor that measures the volume of the liquid will be connected to the heated plate and the needle in order to measure the volume of the meniscus while oscillating. A fundamental understanding of the heat transfer in the contact line region is expected.

scholarly journals Numerical simulation of the airflow over a military aircraft with active intake

2016 ◽  
Vol 231 (8) ◽  
pp. 1369-1390 ◽  
Author(s):  
T Triantafyllou ◽  
T Nikolaidis ◽  
M Diakostefanis ◽  
P Pilidis
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Wind Tunnel ◽  
Research Effort ◽  
Full Scale ◽  
Interface Plane ◽  
Military Aircraft ◽  
Basic Tool ◽  
The Way

The aim of the study presented herein is to numerically predict the behaviour of the airflow around a flying military aircraft with an active intake in which the airflow may enter and travel all the way up to the aerodynamic interface plane (the analytical interface between the inlet and engine). Computational fluid dynamics is used as the basic tool. The geometry created consists of a full-scale military aircraft exposed to different flight conditions. The flow results are mainly focused at the aerodynamic interface plane since the present study is a part of a greater research effort to estimate how the airflow distortion induced to the engine’s face due to the aircraft’s flight attitude, affects the embedded gas turbine’s performance. The obtained results were validated through a direct comparison against similar experimental ones, collected from a wind tunnel environment.

Analysis and Experimental Study on Magnetic Fluid Seal Mechanism

2011 ◽  
Vol 492 ◽  
pp. 273-276 ◽  
Author(s):  
Hai Na Zhang ◽  
De Cai Li
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Field Distribution ◽  
Magnetic Fluid ◽  
Magnetic Field Distribution ◽  
Gas Flows ◽  
Experimental Setup ◽  
Pressure Transmission ◽  
The Magnetic Field ◽  
The Way

The authors put forward a new design of experimental setup in order to study the mechanism of magnetic fluid seal, and used Ansys to simulate the magnetic field distribution in the setup, the results prove its rationality. The experiment to study the way of pressure transmission has been done on the experimental setup. The experimental conclusion shows that pressure transmission is based on the recoverability of the magnetic fluid seal. When pressure exceeds the ability of the seal stage, there is a leak path in the magnetic fluid, and then the gas flows to the next stage, after that, the leak path disappears. Pressure transmits from one seal stage to the next one in this way.

scholarly journals Lessons from the crisis of the Ukrainian church of the XVI century

1999 ◽  
pp. 9-14
Author(s):  
Olga Nedavnya
Keyword(s):  
European Country ◽  
European Community ◽  
Full Scale ◽  
Self Determination ◽  
The Subject ◽  
The Way

Today, when Ukraine has entered the path of independence, on the way of joining the European community, it is worth scrutinizing self-critically, so that our course is not burdened and not confused with the burden of old mistakes and miscalculations. Ukrainian history appears as a story of a strict struggle of the nation for self-determination and existence in general. Can you imagine such a Ukrainian fate, spinning the early glorious pages of our writings? The New Christian Kievan Rus during the days of the princes of Volodymyr the Great and Yaroslav the Wise is a powerful and authoritative European country that was proud of its spiritual upsurge and earthly achievements. And now, after five centuries, it became a land without its own statehood, which was lagging behind in full-scale progress and was in deep church decay. The crisis of the Ukrainian church is like a trick and a key to many interconnected Ukrainian problems, was a subject of particular acuity concerns of her contemporaries and the subject of reflection of many generations of her researchers.

scholarly journals Improving Printed Angle Sensor Performance by Compression-Tension Sensor Pair Compensation

2021 ◽  
Author(s):  
Dila Türkmen ◽  
Merve Acer Kalafat
Keyword(s):  
Silver Nanoparticle ◽  
Life Time ◽  
Experimental Setup ◽  
Angle Sensor ◽  
Sensor Performance ◽  
Tension Sensor ◽  
The Individual ◽  
Pet Substrate ◽  
The Way

Silver nanoparticle angle sensors are inkjet printed on a flexible PET substrate and implemented as pairs of compression and tension side folding individuals into a rigid experimental setup. Resulting combined signals improved the individual sensor responses due to their compensating characteristics, and gave the best performances in the existing literature in terms of linearity, sensor life-time, static and cyclic drift, hysteresis and dynamic dependency. Proposed method is promising for eliminating the major limitations on the printed sensor use in flexible hinges and paving the way to fully soft all-integrated foldable robots.

Conclusion

2017 ◽  
Author(s):  
Frank Fischer
Keyword(s):  
Political Theory ◽  
Local Level ◽  
Full Scale ◽  
Ecological Crisis ◽  
Exploratory Search ◽  
Full Force ◽  
Climate Crisis ◽  
The Way

The Conclusion seeks to make clear not only where the discussion has taken the reader, but also how the journey should be understood. Throughout the eleven chapters of the book we have engaged in an exploratory search for an answer to the question: what are the democratic prospects during a full-scale climate crisis? It is an inquiry that takes the reader from the global to the local level. After briefly summarizing the sections of the book, this Conclusion then underscores the way in which climate “crisis” is a political and ecological crisis. Against worries about eco-authoritarianism, it clarifies the contribution of eco-localism and the role it can play, but also presents its limits. In this regard, it calls for a form of global eco-localism. It closes by stressing the need for a more relevant environmental political theory useful to those who will confront the full force of climate crisis ahead.

scholarly journals Digital beamform simulation in anechoic chamber

2019 ◽  
Vol 30 ◽  
pp. 05003
Author(s):  
Elena Dobychina ◽  
Mikhail Snastin
Keyword(s):  
Experimental Data ◽  
Signal Processing ◽  
Full Scale ◽  
Anechoic Chamber ◽  
Experimental Setup ◽  
Moscow Aviation Institute ◽  
Scale Modeling ◽  
Spatio Temporal ◽  
Antenna Systems

The results of digital beamform simulation, principles of processing and use of the obtained experimental data are presented. Methods were developed and an experimental setup was created for full- scale modeling and measurement of the characteristics of digital antenna systems with spatio-temporal signal processing at the Scientific and Production Center for Radio Information Metrology of the Moscow Aviation Institute (SPC RIM MAI).

Paradigm Shift in Completion Limits: Open Hole Gravel Pack in Highly Depleted Reservoirs Drilled with Well Bore Strengthening Technology

2021 ◽  
Author(s):  
Kevin Whaley ◽  
Phillip J Jackson ◽  
Michael Wolanski ◽  
Tural Aliyev ◽  
Gumru Muradova ◽  
...  
Keyword(s):  
Laboratory Testing ◽  
Drilling Fluid ◽  
Drilling Fluids ◽  
Well Bore ◽  
Drilling Mud ◽  
Additional Time ◽  
Sand Control ◽  
Production Wells ◽  
Open Hole ◽  
Gravel Pack

Abstract Open Hole Gravel Pack (OHGP) completions have been the primary completion type for production wells in the Azeri-Chirag-Gunashli (ACG) field in Azerbaijan for 20 years. In recent years, it has been required to use well bore strengthening mud systems to allow drilling the more depleted parts of the field. This paper describes the major engineering effort that was undertaken to develop systems and techniques that would allow the successful installation of OHGP completions in this environment. OHGP completions have evolved over the last 3 decades, significantly increasing the window of suitable installation environments such that if a well could be drilled it could, in most cases, be completed as an OHGP if desired. Drilling fluids technology has also advanced to allow the drilling of highly depleted reservoirs with the development of well bore strengthening mud systems which use oversized solids in the mud system to prevent fracture propagation. This paper describes laboratory testing and development of well construction procedures to allow OHGPs to be successfully installed in wells drilled with well bore strengthening mud systems. Laboratory testing results showed that low levels of formation damage could be achieved in OHGPs using well bore strengthening mud systems that are comparable to those drilled with conventional mud systems. These drilling fluid formulations along with the rigorous mud conditioning and well clean-up practices that were developed were first implemented in mid-2019 and have now been used in 6 OHGP wells. All 6 wells showed that suitable levels of drilling mud cleanliness could be achieved with limited additional time added to the well construction process and operations and all of them have robust sand control reliability and technical limit skins. Historically it was thought that productive, reliable OHGP completions could not be delivered when using well bore strengthening mud systems due to the inability to effectively produce back filter cakes with large solids through the gravel pack and the ability to condition the mud system to allow sand screen deployment without plugging occurring. The engineering work and field results presented demonstrate that these hurdles can be overcome through appropriate fluid designs and well construction practices.

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