Comparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal

Details

• Personal Author:
  Kravits, Stephen J. ; Sainato, Albert ; Finfinger, Gerald L.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  "This Bureau of Mines report describes and compares the procedures, capital investments, and operating costs of rotary and in-hole motor drilling techniques used to drain methane gas from the Pittsburgh coalbed in an underground mine located in southwestern Pennsylvania. A timestudy was conducted during the drilling of each of two boreholes, and the data were collected to serve as a base for comparing drilling procedures and operating costs. Findings indicate that drilling with an in-hole motor offers four advantages over rotary drilling
  
  namely, an increase in drilling productivity, fewer worker-hours required, ease of maintaining vertical and horizontal bit trajectory, and less expensive drilling cost per foot of borehole." - NIOSTHTIC-2
  
  NIOSHTIC no. 10004416
  
  
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Pennsylvania ; OSHA Region 3
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  ii, 31 numbered pages
• NIOSHTIC Number:
  nn:10004416
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:f453c97f6222689c1da6d4c17c536bb6fe47cf9fee6f9734d1d658d2d1cc1b7f9327d9140e4bf50816babd6bf1088b66a2843bd1d199f12612396c256625d30c
• Download URL:
  https://stacks.cdc.gov/view/cdc/9606/cdc_9606_DS1.pdf
• File Type:
  [PDF - 2.35 MB ]