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Pipeline Landfall Construction by Horizontal Drilling

by John D. Hair, Reading & Bates Construction Co, River Crossing Div, Tulsa, OK, USA,



Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore

Abstract:

The segment of an offshore pipeline where the transition is made from standard offshore laying procedures to standard on land laying procedures represents a difficult and costly construction problem. This problem is compounded by the arctic environment where conditions such as ice scour, extreme weather and intense environmental concern greatly increase costs of conventional construction techniques. A solution to this problem which promises significant economical advantages and minimal environmental impact is the application of the directionally controlled, horizontal drilling technique. This technique has been used throughout the world in construction of pipeline river crossings and landfalls in more temperate environments. A description of today's state-of-the-art in horizontal drilling and an extrapolation of these capabilities to the arctic application are presented. Techniques developed and experience gained in related applications such as tunneling and mining are described and integrated into the proposed construction procedure.

Subject Headings: Offshore construction | Offshore drilling | Construction methods | Offshore pipelines | Offshore structures | Drilling | Underwater pipelines | Arctic

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