HARD ROCK DIRECTIONAL CROSSINGS PROBLEMS SOLVED WITH NEW DIRECTIONAL DRILLING SYSTEMS. NO-DIG 89. DEVELOPMENTS UNDERGROUND. PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON TRENCHLESS CONSTRUCTION FOR UTILITIES, LONDON, APRIL 11-14, 1989

Directionally drilled crossings previously considered impractical in hard rock formations have recently been successfully completed by combining conventional techniques with modified state-of-the-art oil-well directional drilling equipment. This paper discusses the equipment required, the methods of operation and planning considerations for these hard rock crossings. Two case histories are summarized to support the merit of the drilling system. These were: (a) the 3300 ft Newark bay gas pipeline installation which involves drilling through 2600 feet of argillite and sandstone overlain with boulders, cobbles and clay; and (B) the koch pipeline installation crossing the Wisconsin river near stephensville, which involved drilling through 1300 feet of granite covered with boulders, cobbles and sand. The equipment described includes: (a) the drill bit; (b) the fluid or air powered steerable positive displacement drilling motor; (c) measurement while drilling (mwd) directional instrumentation; (d) stabilized drilling assembly; and (e) an on site computer with directional plotting programs. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727715674
• Corporate Authors:

  International Society for Trenchless Technology

  15 John Street
  London,   England 
• Authors:
  • McKenney, F S
  • Knoll, W G
• Publication Date: 1989

Media Info

• Pagination: p. 211-6
• Serial:
  • Publication of: International Society for Trenchless Technology
  • Publisher: International Society for Trenchless Technology

Subject/Index Terms

• TRT Terms: Automatic control; Automation; Conferences; Drilling; Equipment; Field tests; Gases; Installation; Pipe; Rocks; Tunnels; Underground structures
• Uncontrolled Terms: Guidance; Micro; Subterranean
• ITRD Terms: 3882: Automatic; 8525: Conference; 3871: Drilling; 3674: Equipment; 6734: Gas; 9104: Guidance; 6226: In situ; 3840: Installation; 9045: Micro; 3361: Pipe; 4154: Rock; 4372: Subterranean; 3374: Tunnel
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00497720
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-7277-1567-4
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM