An Acoustic Valve Operating System (AVOS) able to quickly and effectively locate and shut or open a subsurface pipeline valve from a distance of half a mile has been developed jointly by Tennessee Gas Pipeline Co. and the Electrodynamics Div. of The Bendix Corp. When lines must be shut off in an emergency, such as a hurricane, great sabings are possible with AVOS both in the physical costs of finding and operating each valve and in shortening the time during which profits from production are lost. The battery-operated transponder activator on each valve operates only when interrogated on one command code. The frequency allocation for the AVOS interrogation code is 9 to 19 kHz, and the reply code is on three frequencies spaced between 8 to 9 kHz. The equipment is designed for a five year life expectancy. Further improvements will permit operation from a helicopter through a transducer lowered into the sea, and ultimately remote control from the dispatcher's office may be possible.

  • Corporate Authors:

    Petroleum Engineer Publishing Company

    Box 1589
    Dallas, TX  United States  75221
  • Authors:
    • Britain, K E
  • Publication Date: 1970-4

Media Info

  • Pagination: 3 p.
  • Serial:
    • Pipeline Engineer
    • Volume: 42
    • Issue Number: 4
    • Publisher: Petroleum Engineer Publishing Company

Subject/Index Terms

Filing Info

  • Accession Number: 00056166
  • Record Type: Publication
  • Source Agency: American Petroleum Institute
  • Files: TRIS
  • Created Date: Jul 15 1974 12:00AM