Development of novel apparatus to obtain soil resistance–displacement relationship for well conductor fatigue analysis
| Autor: | Rune Dyvik, Hendrik Sturm, Arash Zakeri, Philippe Jeanjean |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Engineering
business.industry Soil resistance 0211 other engineering and technologies Well integrity Fatigue damage 02 engineering and technology Structural engineering Geotechnical Engineering and Engineering Geology 01 natural sciences 010305 fluids & plasmas Conductor 0103 physical sciences Cyclic loading Geotechnical engineering Development (differential geometry) business Displacement (fluid) 021101 geological & geomatics engineering Civil and Structural Engineering |
| Zdroj: | Canadian Geotechnical Journal. 54:1435-1446 |
| ISSN: | 1208-6010 0008-3674 |
| DOI: | 10.1139/cgj-2016-0528 |
| Popis: | An important aspect of deepwater well integrity is development of accurate conductor fatigue analysis due to cyclic loading during drilling operations. Fatigue damage in a structure occurs from stress changes in response to cyclic loading. In practice, the lateral cyclic soil response is typically modelled using Winkler lateral load–displacement (p–y) springs. However, recently developed soil models for conductor fatigue analysis are based on physical modelling in a geotechnical centrifuge. Notwithstanding the advantages of centrifuge modelling for investigating the conductor–soil interaction mechanism, development of simple laboratory tools to obtain p–y data directly from intact soil samples obtained from the field can also be very beneficial. This paper describes the development of a novel apparatus to obtain p–y and soil damping relationships from field samples specifically tailored for well conductor fatigue analysis. In addition, it compares test results obtained using reconstituted kaolin clay and intact natural Onsøy clay with centrifuge test results; ultimately demonstrating a satisfactory agreement between the two techniques. The results are highly encouraging and are believed to present a major step forward in deepwater well conductor fatigue analysis. The findings may also be beneficial to the offshore renewable energy sector. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|