Casing/cementing/zonal isolation
This paper describes the evolution of the operator’s initial PWC (perforate, wash, and cement) abandonment projects performed in deepwater Brazil.
The authors reach conclusions that the industry should define a standard testing method to improve swelling performance, including validation of repeatability, to complement existing guidelines.
This year, we observed a notable increase in activity centered on physical technologies, including cementing tools, zonal isolation barriers, and cement evaluation systems.
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A new attachment system overcomes the limitations of traditional methods for securing tools and accessories to drilling and completion strings. -
Brazing technology allows metallurgical joining of dissimilar materials by use of a filler material.
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Despite cement’s remarkable properties, the search continues for enhancements in the areas of cost and isolation performance. Efficiencies and enhancements have been explored even to the point of replacing cement with other materials.
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A field well was designed, built, and used to demonstrate the concept of real-time monitoring of the flow of drilling mud and smart cement and the hardening of the cement in place.
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This paper discusses an expandable-liner-hanger (ELH) system that provides liner rotation during the liner deployment and the cementing operation while providing a hydraulically energized liner-top seal upon setting.
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This paper focuses on cementing-design challenges and discusses the engineering techniques used to approach them.
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In the Eagle Ford, an integrated approach to engineering and operations was key to optimize performance and improve understanding of the area.
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Precise casing-wear prediction is important for improving well integrity and longevity, while simultaneously making casing designs more cost-effective. There are no industry guidelines for casing-wear prediction. This article presents a validated predictive model.
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Cementing is central to the discussion of zonal isolation and well integrity.
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This work demonstrates cement design that includes evaluating cement-sheath mechanical integrity in intercalated salts.
