Methane drainage : experience with hydraulic stimulation through slotted casing

Details

• Personal Author:
  Lambert, Stephen W. ; Trevits, Michael A.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  "The Bureau of Mines examined the wellbore of a vertical gas drainage well in the Mary Lee coalbed to determine the results of specific completion procedures in coal. A jet-slotting tool was used to cut four vertical slots through the casing about 1 ft below the coalbed. Even though stimulation treatment pressure was excessive, hydraulically induced channels were contained entirely within the target coal zone. Sand-filled, induced channels were horizontal, inclined, and vertical, and were propagated in directions similar to bedding planes, rock joint, and coal cleat directions measured in the mine. Variable gas flow rates, recorded during the productive life of the well, were attributed to chronic downhole pump malfunction and the slotted casing below the production zone." - NIOSHTIC-2
  
  NIOSHTIC no. 10000676
  
  
• Subjects:
  Mining Occupational Health Safety
• 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:
  16 numbered pages
• NIOSHTIC Number:
  nn:10000676
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:46953b52476da78d648cee3744ec885962f460aec21c9c5ac2ebe2f460d072011ed4c8cccaf54ccbe852b06902397d37beeb5d0fb4227886afe857cac9b873ba
• Download URL:
  https://stacks.cdc.gov/view/cdc/9268/cdc_9268_DS1.pdf
• File Type:
  [PDF - 857.58 KB ]