Use of Cement as Lost-Circulation Material: Best Practices

2004 ◽  
Author(s):  
E. Fidan ◽  
T. Babadagli ◽  
E. Kuru
Keyword(s):  
Best Practices ◽  
Lost Circulation

Obtaining Zonal Isolation in Geothermal Wells

2021 ◽  
Author(s):  
Allam Putra Rachimillah ◽  
Cinto Azwar ◽  
Ambuj Johri ◽  
Ahmed Osman ◽  
Eric Tanoto
Keyword(s):  
Best Practices ◽  
Oil And Gas ◽  
Lessons Learned ◽  
Free Fluid ◽  
High Heating Rate ◽  
Lost Circulation ◽  
Geothermal Well ◽  
Geothermal Wells ◽  
Zonal Isolation ◽  
Primary Cementing

Abstract Cementing is one of the sequences in the drilling operations to isolate different geological zones and provide integrity for the life of the well. As compared with oil and gas wells, geothermal wells have unique challenges for cementing operations. Robust cementing design and appropriate best practices during the cementing operations are needed to achieve cementing objectives in geothermal wells. Primary cementing in geothermal wells generally relies on a few conventional methods: long string, liner-tieback, and two-stage methods. Each has challenges for primary cementing that will be analyzed, compared, and discussed in detail. Geothermal wells pose challenges of low fracture gradients and massive lost circulation due to numerous fractures, which often lead to a need for remedial cementing jobs such as squeeze cementing and lost circulation plugs. Special considerations for remedial cementing in geothermal wells are also discussed here. Primary cement design is critical to ensure long-term integrity of a geothermal well. The cement sheath must be able to withstand pressure and temperature cycles when steam is produced and resist corrosive reservoir fluids due to the presence of H2S and CO2. Any fluid trapped within the casing-casing annulus poses a risk of casing collapse due to expansion under high temperatures encountered during the production phase. With the high heating rate of the geothermal well, temperature prediction plays an important part in cement design. Free fluid sensitivity test and centralizer selection also play an important role in avoiding mud channeling as well as preventing the development of fluid pockets. Analysis and comparison of every method is described in detail to enable readers to choose the best approach. Massive lost circulation is very common in surface and intermediate sections of geothermal wells. On numerous occasions, treatment with conventional lost-circulation material (LCM) was unable to cure the losses, resulting in the placement of multiple cement plugs. An improved lost circulation plug design and execution method are introduced to control massive losses in a geothermal environment. In addition, the paper will present operational best practices and lessons learned from the authors’ experience with cementing in geothermal wells in Indonesia. Geothermal wells can be constructed in different ways by different operators. In light of this, an analysis of different cementing approaches has been conducted to ensure robust cement design and a fit-for-purpose cementing method. This paper will discuss the cementing design, equipment, recommendations, and best available practices for excellence in operational execution to achieve optimal long-life zonal isolation for a geothermal well.

A Survey of Speech-Language Pathologists' Approaches to Assessing Social Communication Disorders in Children

2020 ◽  
pp. 1-17
Author(s):  
Kristen Izaryk ◽  
Robin Edge ◽  
Dawn Lechwar
Keyword(s):  
Best Practices ◽  
Communication Disorders ◽  
Assessment Tools ◽  
Self Report ◽  
Speech Language Pathologists ◽  
Teacher Report ◽  
Formal Assessment ◽  
Language Sampling ◽  
Specific Assessment ◽  
Social Communication Disorders

Purpose The purpose of this article is to explore and describe the approaches and specific assessment tools that speech-language pathologists are currently using to assess social communication disorders (SCDs) in children, in relation to current best practices. Method Ninety-four speech-language pathologists completed an online survey asking them to identify which of the following approaches they use to assess children with SCD: parent/teacher report, naturalistic observation, formal assessment, language sample analysis, interviews, semistructured tasks, and peer/self-report. Participants were also asked to identify specific assessment tools they use within each approach. Results Participants most commonly assess SCDs by combining interviews, naturalistic observation, language sampling, parent/teacher report, and formal assessment. Semistructured tasks and peer/self-report tools were less frequently utilized. Several established parent/teacher report and formal assessment tools were commonly identified for assessing SCDs. Most participants use an informal approach for interviews, language sampling, and naturalistic observations in their SCD assessment process. Conclusions Generally, participants follow best practices for assessing SCDs by combining several different approaches. Some considerations for future assessment are identified, including the use of established protocols in the place of informal approaches in order to make the assessment of SCDs more systematic. Future directions for research are discussed.

Practical Resources for Provision of Services to Culturally and Linguistically Diverse Users of AAC

2015 ◽  
Vol 22 (1) ◽  
pp. 25-39
Author(s):  
Elena Dukhovny ◽  
E. Betsy Kelly
Keyword(s):  
Best Practices ◽  
Augmentative And Alternative Communication ◽  
Linguistically Diverse ◽  
Intervention Strategies ◽  
Culturally And Linguistically Diverse ◽  
Limited Resources ◽  
Flexible Systems ◽  
Alternative Communication ◽  
Practical Applications ◽  
Provision Of Services

According to the 2010 U.S. Census, over 20% of Americans speak a language other than English in the home, with Spanish, Chinese, and French being the languages most commonly spoken, aside from English. However, few augmentative and alternative communication (AAC) systems offer multilingual support for individuals with limited functional speech. There has been much discussion in the AAC community about best practices in AAC system design and intervention strategies, but limited resources exist to help us provide robust, flexible systems for users who speak languages other than English. We must provide services that take into consideration the unique needs of culturally and linguistically diverse users of AAC and help them reach their full communication potential. This article outlines basic guidelines for best practices in AAC design and selection, and presents practical applications of these best practices to multilingual/multicultural clients.

Autism, AAC, and Proloquo2Go

2009 ◽  
Vol 18 (4) ◽  
pp. 137-145 ◽  
Author(s):  
Samuel Sennott ◽  
Adam Bowker
Keyword(s):  
Best Practices ◽  
Augmentative And Alternative Communication ◽  
Communication Technologies ◽  
Autism Spectrum ◽  
Alternative Communication ◽  
Visual Supports ◽  
Digital Device ◽  
Ipod Touch ◽  
Spectrum Disorders ◽  
Communication Needs

People with ASD often need to access AAC in situations where a tabletop digital device is not practical. Recent advancements have made more powerful, portable, and affordable communication technologies available to these individuals. Proloquo2Go is a new portable augmentative and alternative communication system that runs on an iPhone or iPod touch and can be used to meet the diverse needs of individuals with autism spectrum disorders (ASD) who are ambulatory and have difficulty using speech to meet their full daily communication needs. This article examines Proloquo2Go in light of the best practices in AAC for individuals with ASD such as symbols, visual supports, voice output, and inclusion.

The Developing Relationship Among Cognition, Amplification, and Aural Rehabilitation

2016 ◽  
Vol 1 (6) ◽  
pp. 47-54 ◽  
Author(s):  
Jeffrey J. DiGiovanni ◽  
Travis L. Riffle
Keyword(s):  
Working Memory ◽  
Best Practices ◽  
Cognitive Abilities ◽  
Hearing Aid ◽  
Hearing Aid Fitting ◽  
Aural Rehabilitation ◽  
Basic Concepts ◽  
And Function

The search for best practices in hearing aid fittings and aural rehabilitation has generally used the audiogram and function stemming from peripheral sensitivity. In recent years, however, we have learned that individuals respond differently to various hearing aid and aural rehabilitation techniques based on cognitive abilities. In this paper, we review basic concepts of working memory and the literature driving our knowledge in newer concepts of hearing aid fitting and aural rehabilitation.

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