Directionally Drilled Bores For Remote Cable Landings

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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2003
Accession Number
ADA508102

Entities

People

  • H. G. Thompson
  • N. A. Sinclair
  • R. Roberts
  • Sarah Black

Organizations

  • Naval Facilities Engineering Service Center

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Ascension Island
  • Assembly
  • Atlantic Ocean
  • Boreholes
  • Cargo Aircraft
  • Cost Analysis
  • Costs
  • Data Acquisition
  • Directional
  • Drilling
  • Engineering
  • High Energy
  • Life Cycle Costs
  • Life Cycles
  • Regions
  • Terrain
  • Transport Aircraft

Fields of Study

  • Environmental science

Readers

  • Manufacturing Engineering.
  • Oceanography.
  • Optical Fiber Sensing and Electromagnetic Propagation.