Experimental Study for Establishing Metal-to-Metal Seal Evaluation Criteria for Tubular Connections in Thermal and HPHT Applications

2021 ◽  
Author(s):  
Jueren Xie ◽  
Dale Friesen ◽  
Mark Droessler ◽  
Tim Roth ◽  
Junfeng Xie
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Structural Integrity ◽  
Research Work ◽  
Hybrid Approach ◽  
Product Line ◽  
Constitutive Relationship ◽  
Small Scale ◽  
Well Completion ◽  
Metal Seal

Abstract Qualification of tubular connections is an important task in well completion design for thermal wells, which experience peak temperatures of 180°C to 350°C, as well as high pressure and high temperature (HPHT) wells, which experience peak temperatures up to 180°C and pressures greater than 70 MPa. Industry protocols (such as ISO/PAS 12835:2013 for thermal wells, and ISO 13679:2019 and API RP 5C5:2017 for HPHT wells) have been developed for the purposes of evaluating the structural integrity and sealability of premium connections. In recognition of the the time and capital expense associated with completing "product line validation" for a connection design per these standards for multiple physical configurations (i.e for combinations of various sizes, weights, and grades), industry is developing a hybrid approach that supplements results from physical qualification tests with numerical simulation, such as Finite Element Analysis (FEA). To facilitate numerical modeling, extensive research work has been performed recently (e.g. Xie, Matthew, and Hamilton (2016) and Xie and Matthew (2017)) to establish a constitutive relationship for evaluating metal-to-metal sealability. It was noted in previous studies that further experimental work is required to better understand connection sealing behavior, especially the effects of surface roughness and thread compounds. This paper presents an experimental study with a series of small-scale metal-to-metal seal tests under various levels of seal contact stress and gas pressures representative of thermal and HPHT operational conditions. These tests incorporated the effects of surface roughness and thread compound. FEA was performed to model the stress conditions in the test specimens. Based on the experimental and analytical study, an updated metal-to-metal seal evaluation criterion with calibrated parameters is proposed for tubular connections used in thermal and HPHT applications.

scholarly journals Experimental Study on the Aerodynamic Sealing of Air Curtains

Fluids ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 49 ◽  
Author(s):  
João Viegas ◽  
Fernando Oliveira ◽  
Daniel Aelenei
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Research Work ◽  
Small Scale ◽  
Climatic Zones ◽  
Air Curtain ◽  
Plane Jets ◽  
Analytical Development ◽  
Water Models ◽  
Pass Through

Controlling the air quality is of the utmost importance in today’s buildings. Vertical air curtains are often used to separate two different climatic zones with a view to reduce heat transfer. In fact, this research work proposes an air curtain aimed to ensure a proper separation between two zones, a clean one and a contaminated one. The methodology of this research includes: (i) small-scale tests on water models to ensure that the contamination does not pass through the air curtain, and (ii) an analytical development integrating the main physical characteristics of plane jets. In the solution developed, the airflow is extracted from the contaminated compartment to reduce the curtain airflow rejected to the exterior of the compartment. In this research work, it was possible to determine the minimum exhaust flow necessary to ensure the aerodynamic sealing of the air curtain. This article addresses the methodology used to perform the small-scale water tests and the corresponding results.

Life Cycle Development of Successful Women-owned Enterprises

2020 ◽  
Vol 3 (4) ◽  
pp. 142-152
Author(s):  
Mohammad Waliul Hasanat ◽  
Kamna Anum ◽  
Ashikul Hoque ◽  
Mahmud Hamid ◽  
Sandy Francis Peris ◽  
...  
Keyword(s):  
Life Cycle ◽  
Data Collection ◽  
Research Work ◽  
Primary Data ◽  
Small Scale ◽  
Data Collection Process ◽  
Theoretical Finding ◽  
Successful Women ◽  
Two Phases ◽  
Life Cycle Development

In developing countries, the role of women in the business sector is continuously improving. As a result, female enterprises have also been encouraged in Pakistan. This study is based on life cycle development phases from which women-owned enterprises have to go through in order to become successful. As a primary data source, face-to-face interviews with owners of successful women-owned enterprises were preferred. The data collection process was divided into two phases i.e. Phase-I and Phase-II. After data collection, qualitative analysis has been performed using NVIVO. Findings provide both generic and specific factors involved in life cycle development of women-owned enterprises. This study provides a detailed view of life cycle development model followed by successful women enterprises. The outcome of this research work is a theoretical finding which can be utilized by entrepreneurs owning small scale enterprises to improve their level of performance. Findings can also be helpful for potentially talented women interested in setting up their own business.

Improving of quality of gate assembly contact surfaces of high-pressure fi ttings by diamond burnishing

2020 ◽  
pp. 99-104
Author(s):  
S.A. Zaydes ◽  
A.N. Mashukov ◽  
T.Ya. Druzhinina
Keyword(s):  
Surface Roughness ◽  
High Pressure ◽  
Main Part ◽  
Conical Surface ◽  
The Real ◽  
Metal Seal ◽  
Diamond Burnishing ◽  
Air Tightness ◽  
Contact Surfaces

The contact belt of the gate assembly is the main part of high pressure fittings. The serviceability of the fittings assembly as whole depends on the air-tightness and quality of the mating surfaces. The technology of diamond burnishing allows to increase the interface of the nodes by red ucing the surface roughness of the metal-to-metal seal. The real experience for improving of the fittings contact belt due to the use of diamond burnishing of the nozzles seats and the conical surface of the rods.

scholarly journals Recommendation Systems for Education: Systematic Review

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1611
Author(s):  
María Cora Urdaneta-Ponte ◽  
Amaia Mendez-Zorrilla ◽  
Ibon Oleagordia-Ruiz
Keyword(s):  
Machine Learning ◽  
Systematic Review ◽  
Formal Education ◽  
Research Work ◽  
Hybrid Approach ◽  
Recommendation Systems ◽  
Educational Resources ◽  
Future Research ◽  
Collaborative Approach ◽  
Developmental Approach

Recommendation systems have emerged as a response to overload in terms of increased amounts of information online, which has become a problem for users regarding the time spent on their search and the amount of information retrieved by it. In the field of recommendation systems in education, the relevance of recommended educational resources will improve the student’s learning process, and hence the importance of being able to suitably and reliably ensure relevant, useful information. The purpose of this systematic review is to analyze the work undertaken on recommendation systems that support educational practices with a view to acquiring information related to the type of education and areas dealt with, the developmental approach used, and the elements recommended, as well as being able to detect any gaps in this area for future research work. A systematic review was carried out that included 98 articles from a total of 2937 found in main databases (IEEE, ACM, Scopus and WoS), about which it was able to be established that most are geared towards recommending educational resources for users of formal education, in which the main approaches used in recommendation systems are the collaborative approach, the content-based approach, and the hybrid approach, with a tendency to use machine learning in the last two years. Finally, possible future areas of research and development in this field are presented.

scholarly journals A hybrid approach to very small scale electrical demand forecasting

ISGT 2014 ◽  
2014 ◽  
Author(s):  
Andrei Marinescu ◽  
Colin Harris ◽  
Ivana Dusparic ◽  
Vinny Cahill ◽  
Siobhan Clarke
Keyword(s):  
Demand Forecasting ◽  
Hybrid Approach ◽  
Small Scale ◽  
Electrical Demand

Small scale experimental study of the dynamic response of a tension leg platform wind turbine

2014 ◽  
Vol 6 (5) ◽  
pp. 053108 ◽  
Author(s):  
Anders Mandrup Hansen ◽  
Robert Laugesen ◽  
Henrik Bredmose ◽  
Robert Mikkelsen ◽  
Nikolaos Psichogios
Keyword(s):  
Experimental Study ◽  
Dynamic Response ◽  
Wind Turbine ◽  
Small Scale ◽  
Tension Leg Platform
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