Installing Low-Cost, Low-Pressure Wellhead Compression on Tight Lobo Wilcox Wells in South Texas: A Case History

2004 ◽  
Author(s):  
L.K. Harms
Keyword(s):  
Case History ◽  
Low Cost ◽  
Low Pressure ◽  
South Texas

Implementation of a Rig Test for Rotor/Stator Interaction of Low-Pressure Compressor Blades and Comparison of Experimental Results With Numerical Model

2020 ◽  
Author(s):  
Laura Pacyna ◽  
Alexandre Bertret ◽  
Alain Derclaye ◽  
Luc Papeleux ◽  
Jean-Philippe Ponthot
Keyword(s):  
Low Cost ◽  
Low Pressure ◽  
Angular Speed ◽  
Compressor Blades ◽  
Abradable Coating ◽  
Rotor Stator Interaction ◽  
Blade Tip ◽  
Numerical Tool ◽  
Short Time ◽  
Pressure Compressor

Abstract To investigate the contact phenomenon between the blade tip and the abradable coated casing, a rig test was designed and built. This rig test fills the following constraints: simplification of the low-pressure compressor environment but realistic mechanical conditions, ability to test several designs in short time, at low cost and repeatability. The rig test gives the opportunity to investigate the behavior of different blade designs regarding the sought phenomenon, to refine and mature the phenomenon comprehension and to get data for the numerical tool validation. The numerical tool considers a 3D finite elements model of low-pressure compressor blades with a surrounding rigid casing combined with a specialized model to take into account the effects of the wear of the abradable coating on the blade dynamics. Numerical results are in good agreement with tests in terms of: critical angular speed, blade dynamics and wear pattern on the abradable coated casing.

Frugal Living for Our Collective and Mutual #Bestlife on a Distributed and Global Electronic Hive Mind

2019 ◽  
pp. 77-120
Keyword(s):  
Social Justice ◽  
Low Cost ◽  
Low Pressure ◽  
Shared Values ◽  
Low Carbon ◽  
Carbon Footprints ◽  
Peace Of Mind ◽  
Lifestyle Practices ◽  
Food Animals

What is not as commonly identified as an optimal life #bestlife is living #frugal, and yet, there is a global electronic hive mind about how to live sparingly based on highly variant local realities. There are blogs about living on a shoestring, stretching funds, cooking in, engaging in a DIY economy (bartering with like-minded others), living off the grid, taking low-cost and simple vacations, maintaining a food garden, raising food animals, and forgoing the more spendy aspects of modern living. The narrative goes that saving up and retiring early enables low-pressure and intentional lifestyles (and an ability to focus on family and friends), low-carbon footprints (with low impacts on the environment), and the embodiment of a frugal virtue. This chapter explores what a #frugal living EHM looks like and how it brings together people around shared values and lifestyle practices for personal peace of mind, social justice, and long-term sustainability.

A multi-pronged approach to low-pressure Cu sintering using surface-modified particles, substrate and chip metallization

2019 ◽  
Vol 2019 (1) ◽  
pp. 000387-000392 ◽  
Author(s):  
Sri Krishna Bhogaraju ◽  
Omid Mokhtari ◽  
Jacopo Pascucci ◽  
Fosca Conti ◽  
Hiren R Kotadia ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Cost ◽  
Surface Modifications ◽  
Low Pressure ◽  
Bonding Pressure ◽  
High Tendency ◽  
Promising Alternative ◽  
Die Attach ◽  
Bandgap Semiconductors ◽  
Surface Modified

Abstract High temperature power electronics based on wide-bandgap semiconductors have prominent applications, such as automotive, aircrafts, space exploration, oil/gas extraction, electricity distribution. Die-attach bonding process is an essential process in the realization of high temperature power devices. Here Cu offers to be a promising alternative to Ag, especially because of thermal and mechanical properties on par with Ag and a cost advantage by being a factor 100 cheaper than Ag. With the aim to achieve a low-pressure Cu sintering process, a low cost wet chemical etching process is developed to selectively etch Zn from brass to create nano-porous surface modifications to enhance sinterability, enabling sintering with low bonding pressure of 1MPa and at temperatures below 300°C. However, high tendency of Cu to oxidize poses a major challenge in realizing stable interconnects. For this purpose, in this contribution, we present the use of polyethylene-glycol 600 as reducing binder in the formulation of the Cu sintering paste. Finally, we propose a multi-pronged approach based on three crucial factors: surface-modified substrates, nanostructured surface modifications on micro-scale Cu-alloy particles and use of a reducing binder in the Cu particle paste.

Media Models for the Industrial Goods Advertiser—A Do-it-yourself Opportunity

1970 ◽  
Vol 34 (2) ◽  
pp. 23-27
Author(s):  
Harper W. Boyd ◽  
Henry J. Claycamp ◽  
Charles W. McClelland
Keyword(s):  
Case History ◽  
Low Cost ◽  
Do It Yourself

Can low-cost media models be built for industrial advertisers? These advertisers typically have small media budgets and are faced with specialized audience groups about which little is known. What problems are encountered in building a low-cost media model? What results can be obtained through the use of such a model? The authors attempt to answer these and related questions through the use of a case history.

Hydrogen Damage in a 1250-Psi Boiler

1964 ◽  
Vol 86 (3) ◽  
pp. 341-343 ◽  
Author(s):  
E. E. Galloway
Keyword(s):  
Case History ◽  
Chemical Treatment ◽  
Low Pressure ◽  
Hydrogen Damage ◽  
Boiler Operation ◽  
History Of

This paper covers the case history of hydrogen damage in a relatively low-pressure boiler (1250 psi). Two failures are discussed, as well as the pertinent facts concerning boiler operation, chemical treatment, and cleaning.

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