Refinement of Physics Based Approach Used in the Prediction of Impeller Rotordynamic Forces for Centrifugal Compressors

2008 ◽  
Author(s):  
J. Jeffrey Moore ◽  
David L. Ransom
Keyword(s):  
Oil And Gas ◽  
Cost Effective ◽  
Oil And Gas Industry ◽  
New Physics ◽  
Gas Industry ◽  
Stability Margins ◽  
Area Of Interest ◽  
Industry Standards ◽  
Rotordynamic Forces ◽  
The Cost

The accurate prediction of centrifugal compressor stability continues to be an important area of interest in the oil and gas industry. Ensuring stability is critical to the cost-effective installation and operation of these machines in remote environments where field stability problems are much more expensive to diagnose and correct. Current industry standards and tools for the prediction of impeller destabilizing forces are based on empirical methods that, to date, have served fairly well for systems with reasonable stability margins. However, as stability margins are decreased, use of a modeling method that is more physics based that can better represent the observed trends in machine behavior at low stability margins is needed. Furthermore, the development of mega-class Liquefied Natural Gas (LNG) compressors and ultra-high pressure re-injection compressors provide further motivation to improve accuracy. In this paper, a new physics based expression for the prediction of impeller cross-coupling, previously introduced by Moore et al. [1] is further investigated by analyzing several classes and scale factors of impellers ranging from 2-D designs used in re-injection up to full 3-D impellers typically used in LNG. The new expression is based on both numerical simulation (CFD) and experimental test data from a known instability. Comparisons are made for overall stability prediction as well as sensitivity to system changes. Conclusions are made regarding the applicability and limits of this new approach.

Centrifugal Compressor Stability Prediction Using a New Physics Based Approach

2009 ◽  
Author(s):  
J. Jeffrey Moore ◽  
David L. Ransom
Keyword(s):  
Centrifugal Compressor ◽  
Oil And Gas ◽  
Cfd Simulation ◽  
Cost Effective ◽  
Oil And Gas Industry ◽  
New Physics ◽  
System Stability ◽  
Stability Prediction ◽  
Stability Margins ◽  
Area Of Interest

The accurate prediction of centrifugal compressor stability continues to be an important area of interest in the oil and gas industry. Ensuring stability is critical to the cost-effective installation and operation of these machines in remote environments, where field stability problems are much more expensive to diagnose and correct. Current industry standards and tools for the prediction of impeller destabilizing forces are based on empirical methods that, to date, have served fairly well for systems with reasonable stability margins. However, as stability margins are decreased, use of a modeling method that is more physics based and can better represent the observed trends in machine behavior at low stability margins is required. Furthermore, the development of mega-class Liquefied Natural Gas (LNG) compressors and ultra-high pressure reinjection compressors provides further motivation to improve accuracy. In this paper, a new physics based expression for the prediction of impeller cross-coupling, previously described by Moore, et al. [1] is further investigated by analyzing several classes and scale factors of impellers ranging from 2-D designs used in reinjection to full 3-D impellers typically used in LNG. The new expression is based on both Computational Fluid Dynamics (CFD) simulation and experimental test data from a known instability. These results are then applied to two case studies of marginally stable and unstable compressors in the field that were studied by the authors’ company. For each case study, the system stability is evaluated using both the new physics based expression as well as the more traditional empirical approaches. Comparisons are made for overall stability prediction as well as sensitivity to system changes. Conclusions are made regarding the applicability and limits of this new approach.

ABOUT NECESSITY OF MATHEMATICAL MODELING OF THE BUSINESS PROCESS OF COST ESTIMATE CALCULATIONS IN THE CONSTRUCTION OF OIL AND GAS FACILITIES

2017 ◽  
pp. 139-145
Author(s):  
R. I. Hamidullin ◽  
L. B. Senkevich
Keyword(s):  
Mathematical Modeling ◽  
Quality Assessment ◽  
Business Process ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Construction Organizations ◽  
The Cost ◽  
Cost Of Construction

A study of the quality of the development of estimate documentation on the cost of construction at all stages of the implementation of large projects in the oil and gas industry is conducted. The main problems that arise in construction organizations are indicated. The analysis of the choice of the perfect methodology of mathematical modeling of the investigated business process for improving the activity of budget calculations, conducting quality assessment of estimates and criteria for automation of design estimates is performed.

Agile framework for capital projects

2021 ◽  
Vol 61 (2) ◽  
pp. 422
Author(s):  
Polly Mahapatra ◽  
Paris Shahriari
Keyword(s):  
Oil And Gas ◽  
Hybrid Approach ◽  
Oil And Gas Industry ◽  
Quick Response ◽  
Capital Projects ◽  
Gas Industry ◽  
Response To Change ◽  
The Cost ◽  
Early Phases ◽  
The Ideal

Under the increased pressure of rapidly changing market conditions and disrupting technologies, continuous improvements in efficiency become indispensable for all oil and gas operators. Traditional project management principles in the oil and gas industry employ rigid methods of planning and execution that can sometimes hinder adaptability and a quick response to change. Considering the potential that Agile principles can offer as a solution, the challenge, therefore, is to identify the ideal, hybrid, approach that leverages Agile while incorporating the traditional linear workflow necessitated by the oil and gas industry. This paper seeks to assess pre-existing literature in the application of the Agile principles in the oil and gas industry with a focus on Major Capital Projects (MCPs), backed by the successes experienced as a result of specific pilot projects completed at Chevron’s Australian Business Unit. In particular, this paper will focus on how agility has resulted in improvements to the cost, schedule, teaming and cohesion of MCPs in the early phases as well as key learnings form the pilot agility projects.

Lessons From History: The Value of Competent People

2007 ◽  
Vol 01 (01) ◽  
pp. 8-11
Author(s):  
J. Ford Brett
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Demographic Changes ◽  
Gas Industry ◽  
The Cost

Feature - The cost of the "big crew change" to the oil and gas industry could be huge—the equivalent of 20% of total industry E&P expenditures, or more than U.S. $35 billion per year. J. Ford Brett, President of PetroSkills, explains the financial downside of demographic changes.

Manufacture and Qualification of Small Diameter / Thickwall Reelable DSAWL Linepipe

2016 ◽  
Author(s):  
Stephen Hall ◽  
Martin Connelly ◽  
Graham Alderton ◽  
Andrew Hill ◽  
Shuwen Wen
Keyword(s):  
Oil And Gas ◽  
Small Diameter ◽  
Oil And Gas Industry ◽  
Fe Model ◽  
External Diameter ◽  
Gas Industry ◽  
The North ◽  
Innovative Thinking ◽  
The North Sea ◽  
The Cost

Tough market conditions have seen the price of oil drop which with the subsequent uncertainty surrounding the industry have seen the oil and gas industry concentrate on reducing the cost of designing, installing and operating pipelines. A critical process for the industry is the procurement, manufacture and installation of appropriate linepipe. The method of installation is often dictated by the pipe size and the water depth that the pipe is to be laid in, however there are times when the choice of lay method is due to vessel availability and relative costs for each technique. In early 2014, Tata Steel successfully manufactured and delivered 16"OD × 0.875”WT X65 submerged arc welded longitudinal (SAWL) linepipe for installation via the reel lay method. Notable features about this fact were the size, which represents the thickest 16” external diameter UOE pipe yet delivered by Tata Steel, and that this was to be the first UOE pipe to be installed by the reel lay method in the North Sea. The ability to manufacture small diameter thickwall linepipe was only possible due to recent operational developments including an established tooling programme and a fully validated Finite Element (FE) model of the UOE process, along with years of experience of integrating these tools into the manufacturing process. This paper discusses the manufacturing challenges for small diameter thickwall linepipe, and how with the aid of modelling tools, innovative thinking and previous experience in supplying small diameter thickwall linepipe into two reel-installed projects, the pipe was manufactured and delivered with the properties shown to be compliant with DNV OS-F101 Supplementary Requirement P.

scholarly journals Characterization and Treatment Technologies Applied for Produced Water in Qatar

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3573
Author(s):  
Hana D. Dawoud ◽  
Haleema Saleem ◽  
Nasser Abdullah Alnuaimi ◽  
Syed Javaid Zaidi
Keyword(s):  
Natural Gas ◽  
Oil And Gas ◽  
Produced Water ◽  
Cost Effective ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Treatment Techniques ◽  
Treatment Technologies ◽  
Oil Gas

Qatar is one of the major natural gas (NG) producing countries, which has the world’s third-largest NG reserves besides the largest supplier of liquefied natural gas (LNG). Since the produced water (PW) generated in the oil and gas industry is considered as the largest waste stream, cost-effective PW management becomes fundamentally essential. The oil/gas industries in Qatar produce large amounts of PW daily, hence the key challenges facing these industries reducing the volume of PW injected in disposal wells by a level of 50% for ensuring the long-term sustainability of the reservoir. Moreover, it is important to study the characteristics of PW to determine the appropriate method to treat it and then use it for various applications such as irrigation, or dispose of it without harming the environment. This review paper targets to highlight the generation of PW in Qatar, as well as discuss the characteristics of chemical, physical, and biological treatment techniques in detail. These processes and methods discussed are not only applied by Qatari companies, but also by other companies associated or in collaboration with those in Qatar. Finally, case studies from different companies in Qatar and the challenges of treating the PW are discussed. From the different studies analyzed, various techniques as well as sequencing of different techniques were noted to be employed for the effective treatment of PW.

scholarly journals Analysis of approaches for creating pipe connections in oil and gas equipment

2021 ◽  
Vol 2094 (4) ◽  
pp. 042012
Author(s):  
K A Bashmur ◽  
V A Kukartsev ◽  
V S Tynchenko ◽  
E G Kravcova ◽  
A V Kuznetsov ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Electron Beam Welding ◽  
Oil And Gas Industry ◽  
Subject Area ◽  
Gas Industry ◽  
Patent Review ◽  
Pipe Joints ◽  
The Subject ◽  
The Cost ◽  
Submerged Arc

Abstract The article deals with the problem of connecting pipelines in the oil and gas industry. One of the connection methods is resistance welding. Often, the use of this approach shows muted efficiency as it depends on the qualifications of the welder. A technique for creating flange (plane) connections with a pipe in the oil and gas industry is considered. The necessary equipment and types of welds within the considered area are considered. Thus, it is necessary to conduct a literature-patent review to find an alternative method for creating welded joints in oil and gas pipelines in order to increase the reliability of such joints and reduce the cost of production. The analysis of the subject area and the search for possible solutions to the problem posed were carried out. Various welding methods (manual electric arc, automatic submerged-arc welding, induction brazing, etc.) are considered and a comparison of the main welding methods is given, as well as the rationale for the use of electron beam welding to create such pipe joints.

scholarly journals NDT application for detection of corrosion under insulation in Vietnam

2021 ◽  
Vol 11 (1) ◽  
pp. 48-54
Author(s):  
The Man Nguyen ◽  
Duc Vinh Vu
Keyword(s):  
High Temperature ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Piping System ◽  
Gas Industry ◽  
Non Destructive Evaluation ◽  
The Cost ◽  
Fluid Leak ◽  
Non Destructive ◽  
Corrosion Under Insulation

: In the oil and gas Industry, insulation materials can be used widely for piping system, tank and vessel in either low or high temperature applications. CUI can cause equipment degradation, fluid leak, which lead to explosion or environmental pollution and the cost will very expensive. Therefore, CUI need to be detected early to prevent damage. Through experiment, Center for Non-Destructive Evaluation (NDE) studied on establishing and appliying 4 NDT procedures for CUI examination on typical petroleum piping using in Vietnam. A discussion is presented below

scholarly journals Problems of small and junior business in the oil and gas industry of the Russia. Part 2. Development options

2020 ◽  
Vol 15 (4) ◽  
Author(s):  
S.M. Astakhov ◽  
◽  
A.M. Astakhov ◽  
Keyword(s):  
Empirical Study ◽  
Small Businesses ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Well Drilling ◽  
Gas Industry ◽  
Active Involvement ◽  
Geological Conditions ◽  
Geological Information ◽  
The Cost

Based on the empirical study conducted in the first part of this article, a description of the problems hindering the development of small and junior business in Russia is described; the steps to move this process off the ground are given. The following mechanisms are proposed: a multiple reduction in the cost of exploratory drilling; regulation of the circulation of geological information to create a market for multi-client geophysical and geochemical services; active involvement of small businesses in exploration by regular licensing rounds. The mechanisms are embedded in the system with the creation of pilot sites that are geographically and geologically fixed in the zones of the petroleum bearing areas with developed infrastructure and with well-known geological conditions for well drilling.

Qualification of AM-Parts for The Offshore Industry

2021 ◽  
Author(s):  
Ole-Bjørn Ellingsen Moe ◽  
Bertrand Henri Benoit Maillon
Keyword(s):  
Additive Manufacturing ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Industry Standards ◽  
Expert Advisory ◽  
Independent Expert ◽  
Recommended Practices ◽  
Offshore Industry ◽  
Wire Arc Additive Manufacturing

Abstract Use of additive manufacturing (AM) technology is quite mature in medicine and aerospace industries but adoption of the technology has been limited in the oil and gas industry. One of the reasons behind the slow adoption is the non-availability of industry standards and recommended practices. DNV aims to help the adoption of AM in the oil and gas industry by providing the needed industry standards and recommended practices. DNV is one of the largest classification societies in the world and provides classification, technical assurance, software and independent expert advisory services to the maritime, oil & gas and energy industries. DNV has been running several projects globally to help the industry qualify materials and products produced by additive manufacturing. DNV has been working since January 2018 together with main stakeholders in a joint Industry Project (JIP) to develop requirements necessary to introduce components made by AM for oil and gas and related applications. The outcome of the JIP was released to the industry in 2020; a standard that describes the qualification and quality assurance of AM parts. The AM technologies addressed in the standard are laser based powder bed fusion (PBF-LB) and wire arc additive manufacturing (WAAM). In this paper, the standard is presented, and a systematic way to qualify parts made by PBF-LB and WAAM technologies described. A case study, leading to a qualified part according to the standard will be presented. It has been led by Vallourec, a world leader in tubular solutions for the energy sectors. Vallourec embraced additive manufacturing a few years ago and is currently developing and offering WAAM components for various industries.

Sign in / Sign up

Export Citation Format

Share Document