World Pipelines asked Stuart Stephens, Director of Special Projects, Stockton Drilling Ltd, UK, some questions about horizontal directional drilling.
Describe a recent HDD project for an oil/gas pipeline
Stockton Drilling Ltd has been involved in the outline design of two landfalls required for 28 in. gas pipelines on the east coast of England, UK. The landfalls required a trenchless methodology due to the presence of Sites of Special Scientific Interest (SSSI) designations on the coastline, combined with steep site topography behind the foreshore.
Informed by the results of topographic, bathymetric surveys and ground investigation, the favoured methodology is Direct Pipe. This offers the benefit of providing a sleeve for the pipeline, therefore de-links the landfall works from the pipeline installation works. This provides more flexibility around construction phases which will be dictated by weather and sea state windows. Direct Pipe also offers the benefit of reducing offshore works for the landfall …
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Read the article online at: https://www.worldpipelines.com/equipment-and-safety/17072023/hdd-qa/
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