Modification of a Pneumatic Track Drill for Underwater Use by Divers

Abstract

The Navy relies on explosive excavation techniques for channel deepening and the emplacement of underwater pipelines in rocky bottoms. Effective use of these explosives requires that they be placed in holes drilled into the rock. Although Navy-issued self-propelled track drills offer an advantageous method of drilling these holes, they have quickly failed when used under water. Under sponsorship of the Naval Facilities Engineering Command, NCEL has successfully modified a Navy issue Worthington Model 1290D Track Drill for underwater use to depths of 120 feet. The main modifications include sealing and pressure equalizing the hydraulic system, sealing to the extent possible the pneumatic system, repositioning the controls for better diver operator visibility, and improved lubrication of the pneumatic components. This report describes these modifications, the test program, and suggests further improvements.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1974
Accession Number
AD0778333

Entities

People

  • G. L. Page

Organizations

  • Naval Facilities Engineering Service Center

Tags

Communities of Interest

  • Counter IED

DTIC Thesaurus Topics

  • Actuators
  • Air Supplies
  • Check Valves
  • Civil Engineering
  • Construction
  • Drilling
  • Drills
  • Engineering
  • Explosives
  • Hydraulic Actuators
  • Hydraulic Cylinders
  • Lubrication
  • Maintenance
  • Materials
  • Preventive Maintenance
  • Self Propelled
  • Water

Readers

  • Manufacturing Engineering.
  • Maritime and Naval Warfare Studies
  • Robotics and Automation.