Evolution of a High Temperature Sealing Material Technology

2002 ◽  
Author(s):  
John Hoyes
Keyword(s):  
High Temperature ◽  
Test Data ◽  
Material Technology ◽  
Service Experience ◽  
Inorganic Binder ◽  
General Properties ◽  
Sealing Material ◽  
Sealing Materials ◽  
Spiral Wound

This paper discusses the shortcomings at high temperature of the existing sealing materials and introduces a novel, evolving, high temperature sealing material technology based upon the use chemically exfoliated vermiculite as an inorganic binder. The general properties of the materials developed on the basis of this technology are discussed and test data for sheet, spiral wound and covered serrated metal cored gaskets is presented. Service experience is also discussed.

scholarly journals Moisture-Resistant Sealing Materials for Downhole HPHT Electrical Feedthrough Package

2019 ◽  
Vol 16 (3) ◽  
pp. 141-148
Author(s):  
Hua Xia ◽  
Nelson Settles ◽  
David DeWire
Keyword(s):  
High Temperature ◽  
Water Immersion ◽  
Electrical Power ◽  
Covalent Bond ◽  
Phase Structures ◽  
Sealing Material ◽  
Drilling Tools ◽  
Measurement While Drilling ◽  
Sealing Materials ◽  
Moisture Resistant

Abstract A bismuth oxide–based multicomponent glass system, xH3BO3-yBi2O3-(1-x-y-δ)MO-δ· rare earth oxides (REOs) with MO = TiO2, BaO, ZnO, Fe2O3, etc., and lanthanum series–based REOs, for making downhole high-pressure and high-temperature electrical feedthrough package has been developed using high-temperature melt-quenching and sintering technologies. By properly controlling phase structures in material-manufacturing processes, the obtained sealing materials have shown moisture-resistant properties in their monoclinic and tetragonal mixed phase structures but strongly hydrophobic properties in their covalent bond tetragonal phase. Sealed electrical feedthrough packages have been evaluated under boiling water immersion and 200°C/30,000 PSI water-fluid–simulated downhole harsh environments. The post electrical insulation measurement has demonstrated to be greater than 1.0 × 1014 Ω electrical resistance. This article will show that such a high–bonding strength and high–insulation strength sealing material could be used to seal electrical feed-throughs and connectors for 300°C/30,000 PSI downhole and subsea wireline, logging while drilling, and measurement while drilling tools' signal, data, and electrical power transmissions.

Moisture-resistant sealing materials for downhole HPHT electrical feedthrough package

2019 ◽  
Vol 2019 (HiTen) ◽  
pp. 000022-000027
Author(s):  
Hua Xia ◽  
Nelson Settles ◽  
David DeWire
Keyword(s):  
High Temperature ◽  
Water Immersion ◽  
Electrical Power ◽  
Covalent Bond ◽  
Phase Structures ◽  
Sealing Material ◽  
Measurement While Drilling ◽  
Logging While Drilling ◽  
Sealing Materials ◽  
Moisture Resistant

Abstract A bismuth oxide based multi-component glass system, xH3BO3-yBi2O3-(1-x-y-δ)MO-δ·REO with MO=TiO2, BaO, ZnO, Fe2O3, etc., and lanthanum series based rare earth oxides (REO), for making downhole high-pressure and high-temperature (HPHT) electrical feedthrough package, has been developed using high-temperature melt-quenching and sintering technologies. By properly controlling phase structures in the material manufacturing processes, the obtained sealing materials have shown moisture-resistant properties in their monoclinic and tetragonal mixed phase structures, but strongly hydrophobic properties in their covalent bond tetragonal phase. The sealed electrical feedthrough packages have been evaluated under boiling water immersion and 200°C/30,000PSI water-fluid simulated downhole harsh environments. The post measurement has demonstrated to be greater than 1.0×1014 Ω electrical resistance. This paper will show that such a high-bonding-strength and high-insulation-strength sealing material could be used to seal electrical feedthroughs and connectors for 300°C/30,000PSI downhole and subsea wireline, logging while drilling (LWD), and measurement while drilling (MWD) tools' signal, data, and electrical power transmissions.

Further Developments to the Change Gasket

2014 ◽  
Author(s):  
Stephen Bond ◽  
Ebadollah Jamalyaria
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Common Type ◽  
The Other ◽  
Test Results ◽  
Sealing Material ◽  
Wound Type ◽  
Recent Developments ◽  
Improved Performance ◽  
Spiral Wound

Currently, there are two well established and common types of gaskets which cover most critical high pressure and high temperature applications in industry. Spiral wound type gaskets have been in use as one of the most versatile types of gaskets since it was invented over 100 years ago by Flexitallic. Grooved metal gaskets with a covering of soft sealing material, also known as Kammprofile gaskets are the other most common type used in critical applications, these have also been in existence over 80 years. Each of these two types have their specific characteristics making them strong in some areas and less strong in other aspects. A novel type called “Change Gasket” is a cross between two types, that combines the beneficial features of each of the above types in one product. The various test results showing its improved performance over traditional gaskets, as well as engineering features built into this product will be discussed in this paper. This paper will discuss the recent developments and updates to Change gasket.

scholarly journals Evaluation of Antimicrobial Efficacy and Permeability of Various Sealing Materials at the Implant–Abutment Interface—A Pilot In Vitro Study

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 385
Author(s):  
Igor Smojver ◽  
Marko Vuletić ◽  
Dražena Gerbl ◽  
Ana Budimir ◽  
Mato Sušić ◽  
...  
Keyword(s):  
Fungal Infections ◽  
Aerobic Condition ◽  
In Vitro Study ◽  
Vitro Study ◽  
Antimicrobial Efficacy ◽  
Sealing Material ◽  
Implant Abutment ◽  
Static Conditions ◽  
Sealing Materials

The microenvironment of the oral cavity is altered when an implant, a biocompatible foreign body, is inserted into the mouth. Bacteria settle in the tissues in and around the implant due to the passage of microorganisms through the microgap at the connection of the implant and prosthetic abutment. To prevent colonization of the implant by microorganisms, one idea is to use sealing and antimicrobial materials to decontaminate the implant–abutment interface and close the microgap. The purpose of this study is to evaluate the antimicrobial efficacy and permeability of different types of sealing materials at the implant–abutment interface, under static conditions. Three different sealing material (GapSeal gel, Oxysafe gel and Flow.sil) were used for sealing the implant–abutment interfaces in 60 titanium dental implants, which were first contaminated with a solution containing Staphylococcus aureus and Candida albicans for 14 days under an aerobic condition. Results showed that a complete seal against bacterial infection was not formed at the implant–abutment interface, while for fungal infections, only GapSeal material helped to prevent microleakage. Findings of this in vitro study reported that application of sealing material before abutment connection may reduce peri-implant bacterial and fungal population compared with the interface without sealing material.

Robust Class-I BME Ceramic Capacitors for High Temperature Applications

2010 ◽  
Vol 2010 (HITEC) ◽  
pp. 000251-000258
Author(s):  
Abhijit Gurav ◽  
Xilin Xu ◽  
Jim Magee ◽  
Jeff Franklin ◽  
Travis Ashburn
Keyword(s):  
High Temperature ◽  
Test Data ◽  
Dielectric Material ◽  
Class I ◽  
Severe Reduction ◽  
Ceramic Capacitors ◽  
Temperature Application ◽  
Dc Bias ◽  
Reliability Performance ◽  
Robust Reliability

In capacitors for applications at temperatures of 150°C or above, such as automotive under-the-hood electronics and power electronics, a robust dielectric material is necessary. In traditional X8R ceramic capacitors (EIA specification, ΔC/C within ±15% between −55°C and +150°C compared that at 25°C), the dielectric material is designed for applications up to 150°C. However, at temperatures above 150°C, the X8R capacitors typically suffer from degradation of reliability performance and severe reduction in capacitance, especially under DC bias conditions. Recently, a Class-I C0G dielectric has been developed using Nickel electrodes for high temperature application up to 200°C. Due to its linear dielectric nature, this material exhibits highly stable capacitance as a function of temperature and voltage. Multi-layer ceramic capacitors (MLCC) made from this material can be qualified as X9G with robust reliability. This paper will report electrical properties and reliability test data on these Class-I C0G ceramic capacitors at temperatures ≥150°C. In addition, test data from D-E curves and energy density measurements will be reported along with a discussion of possible mechanisms behind the robust reliability of this material.

The Evolution of a Range of Service Experience Rationalised Sealing Materials

2004 ◽  
Author(s):  
John R. Hoyes
Keyword(s):  
Material Testing ◽  
End User ◽  
Cost Performance ◽  
Service Failures ◽  
Testing Tools ◽  
Sealing Material ◽  
The Relationship ◽  
Survival Of The Fittest ◽  
Sealing Materials ◽  
Structure Test

With the benefit of hindsight some of the initial non-asbestos offerings were doomed to be commercial failures and since then evolution, in the true Darwinian “survival of the fittest” sense, has resulted in the demise of those offerings. In parallel with this process of evolution, the sealing material testing tools that are available have improved. Consequently, the relationship between a material’s contents, its structure, test data and its service potential is far better understood than in previous times. This improved understanding has brought, and will continue to bring, enhanced performance benefits to the end user and increased security against unplanned shut down due to service failures. This paper reviews the evolution process, highlights the classes of materials that have proven to be successful and tries to indicate why, in terms of the properties of the material, they have been successful. The salient features of the content and structure of these materials are also discussed. The paper also speculates about the way in which further consolidation of the range of sealing materials may come about as the process of evolution, driven by cost, performance and environment pressures, continues.

scholarly journals Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident

2020 ◽  
Vol 7 (3) ◽  
pp. 19-00560-19-00560
Author(s):  
Yoshihito YAMAGUCHI ◽  
Jinya KATSUYAMA ◽  
Yoshiyuki KAJI ◽  
Masahiko OSAKA ◽  
Yinsheng LI
Keyword(s):  
High Temperature ◽  
Test Data ◽  
Creep Test ◽  
Severe Accident ◽  
High Temperature Creep ◽  
Temperature Creep ◽  
Lower Head ◽  
Failure Evaluation
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