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Energy and Power ProductionElectric Power Production and Distribution

Directionally Drilled Bores For Remote Cable Landings

Authors: N A Sinclair; H G Thompson; S A Black; R Roberts; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
Abstract:
A cable shore landing protection system was needed at Southwest Bay, Ascension Island, to protect future cables coming ashore. Three subsurface conduits were installed from the shore out under the seafloor, using a lightweight horizontal drill rig. These three Directionally Drilled Boreholes range from 500 to 800 feet in length, and exit the seafloor at water depths of 35 feet or greater. These boreholes were installed in late August and early September of 2002. This effort took 13 days on site to accomplish.

Limitations: APPROVED FOR PUBLIC RELEASE
Description: Conference paper
Pages: 6
Report Date: 01-Sep-2003
Report Number: A201805
Keywords relating to this report:
*ASCENSION ISLAND
*BOREHOLES
*Drilling machines
*OCEAN BOTTOM
*UNDERWATER CABLES
BORES
CONDUITS
DEPTH
DRILLING
HORIZONTAL ORIENTATION
LIGHTWEIGHT
REPRINTS
SUBSURFACE
SYMPOSIA
WATER
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