Installation loading and stress analysis involved with pipelines installed by horizontal directional drilling
- Stress Engineering Services, Inc., Houston, TX (United States)
- J.D. Hair & Associates, Inc., Tulsa, OK (United States)
Pipelines installed by horizontal directional drilling (HDD) are subject to a combination of tension, blending, and external pressure. These installation loads, either individually or in combination, can be more severe than operational loads and may govern drilled path design or specification. This is particularly true as the state of the art in horizontal directional drilling is advanced to larger pipe diameters and longer drilled lengths. This paper presents methods for calculating installation loads, including pulling forces, and analyzing combined stresses in steel pipe during installation and operation. Pipe to soil frictional and fluidic drag forces are discussed. A method for analyzing the effect of bends on pulling force is presented. Methods of analysis are illustrated with example calculations. The paper results from work done under the sponsorship of the Pipeline Research Committee at the American Gas Association and is taken from an engineering design guide produced specifically for HDD pipeline installation. 10 refs., 5 figs.
- OSTI ID:
- 263399
- Report Number(s):
- CONF-9603151--; CNN: Contract PR-227-9424
- Country of Publication:
- United States
- Language:
- English
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