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Abrasive-enhanced water-jet drill for hard rocks

Public Domain
File Language:
English


Details

  • Personal Author:
  • Corporate Authors:
    United States. Bureau of Mines
  • Description:
    "The U.S. Bureau of Mines has patented and transferred to industry an abrasive-enhanced water-jet rock drill. This drill incorporates three novel components: a collimator, jet deflectors for cutting clearance, and an unpressurized swivel, which rotates at 1,000 rpm while passing 20 gpm of an abrasive slurry flowing at 1,000 ft/s. Drilling occurs through the action of a 10,000-psi, 20-gpm water jet into which is entrained 22 lb/min of abrasives. The pumps, hoses, and fittings are those commonly used in the water-jet-cleaning industry. Only inexpensive, common sandblasting abrasives are used. This drill can cut through hard rocks with moderate-pressure jets

    e.g., rocks with a compressive strength of 73,000 psi can be drilled with a 10,000-psi abrasive jet. In addition to drilling holes, the drill can cut deep, narrow kerfs

    collar a hole at any angle

    drill through rubble

    and chamber holes. The development of the abrasive jet drill is a significant advance in the state of the art of hard- rock drilling. The government of the United States has licensed the abrasive jet drill patent to weatherford water jetting systems." - NIOSHTIC-2

    NIOSHTIC no. 10007262

  • Subjects:
  • Series:
    Mining Publications
  • Subseries:
    Report of Investigations
  • Document Type:
    Text
  • Genre:
    Report
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    10 numbered pages
  • NIOSHTIC Number:
    nn:10007262
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:425c35cc30730fa9f019448b559991927485335564af74cfbbdc510ab325cd17d7b777b41387d1a9a5360e16191008884847db0463be1d95be8fe1566884a687
  • Download URL:
  • File Type:
    Filetype[PDF - 5.89 MB ]
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