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.

Hydrophobic sealing materials for harsh environmental electrical connector package applications

2019 ◽  
Vol 2019 (1) ◽  
pp. 000078-000084
Author(s):  
Hua Xia ◽  
Nelson Settles ◽  
David DeWire
Keyword(s):  
Thermal Expansion ◽  
Coefficient Of Thermal Expansion ◽  
Electrical Power ◽  
Covalent Bond ◽  
Material System ◽  
Inconel Alloys ◽  
Electrical Connector ◽  
Sealing Material ◽  
Amorphous Glass ◽  
Highly Hydrophobic

Abstract A highly hydrophobic sealing material system has been developed using high-temperature melt-quenching and sintering technologies for harsh environmental electrical connector package sealing applications. The sealing material properties can be varied by its phase structures, such as amorphous glass, crystalline monoclinic and tetragonal mixed phase, and covalent bond tetragonal phase, which are determined by a two-stage synthesizing process. The dilatometer measurements have found that the ambient coefficient of thermal expansion varies from ~5.8 to 7.1 ppm/°C while the coefficient of thermal expansion at its glass transition temperatures varies from ~7.0 to 9.0 ppm/°C. These coefficients of thermal expansion could provide not only wide options for integrating metal materials, such as Ti-alloy, Kovar, Inconel alloys, and Stainless Steels for making reliable electrical connector packages, but also enable the design of electrical connector packages with a safety factor of 3 performance, operable at 30KSI (30,000 PSI) pressure, and −100 −300°C harsh conditions while maintaining at least 5,000MΩ insulation resistances, for reliable signal, data, and electrical power transmissions.

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 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.

Experiments on High-Temperature Inert Gas Plasma MHD Electrical Power Generation with Hall and Diagonal Connections

2015 ◽  
Vol 193 (3) ◽  
pp. 17-23 ◽  
Author(s):  
Fumihiko Komatsu ◽  
Manabu Tanaka ◽  
Tomoyuki Murakami ◽  
Yoshihiro Okuno
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Electrical Power Generation ◽  
Electrical Power ◽  
Inert Gas ◽  
Gas Plasma

scholarly journals Comparison of Performance of Magneto Hydrodynamics Generator in Presence of Hall Effect

2012 ◽  
Vol 1 (4) ◽  
pp. 472
Author(s):  
Ahmadali Khatibzadeh ◽  
Mohammad reza Alizadeh Pahlavani
Keyword(s):  
High Temperature ◽  
Simple Model ◽  
Hall Effect ◽  
Electrical Power ◽  
Mhd Generator ◽  
Ion Slip

Studying of high-temperature plasmas exposed to strong electromagnetic ?eld is Magneto Hydrodynamics. Also, it is used to obtain an electrical power. This paper proposes a simple model of MHD generator. Moreover, efficiency of different configuration of this generator is obtained by this model. Also, this paper compares different configurations of Faraday generator with the Hall generator based on their isotropic efficiency. Moreover, this model considers the effect of Hall Effect (Ion slip) on the efficiency. This analysis proof that Hall Effect decrease the efficiency in Faraday generator but increase the efficiency in the Hall generator.

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.

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