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Demonstration of safety plugging of oil wells penetrating Appalachian coal mines.

Authors
Rennick-GE; Pasini-J III
Source
Morgantown, WV: U.S. Department of the Interior, Bureau of Mines, TPR-56, :1-23
NIOSHTIC No.
10009769
Abstract
An oil well penetrating the Pittsburgh bituminous coalbed in northern West Virginia was plugged and safely mined through 3 months later. A sensitive chemical tracer, introduced into the oil reservoir before the test, was not detected in the mine air following the plugging and during mining of the pillar and penetration of the well. Effectiveness of the plugging in preventing reservoir gas from entering the mine through the well hole was verified by continuous monitoring of the mine air for indications of sulfur hexafluoride, an inert gas detectable in amounts as minute as 0.5 Part per billion. Expandable cement and fly ash-gel-water slurry were utilized to seal the well above and below the coal seam. Three other wells were also plugged using various techniques.
Keywords
Mine-gases; Mining-industry; Explosive-gases; Explosive-atmospheres; Underground-mining; Coal-mining; Control-technology; Engineering-controls; Combustible-gases; Combustibility; Ventilation; Gas-detectors; Gas-indicators
Publication Date
19720101
Document Type
IH
Fiscal Year
1972
NTIS Accession No.
PB-211350
NTIS Price
A03
Identifying No.
TPR-56
NIOSH Division
MERC; BERC
Source Name
Morgantown, WV: U.S. Department of the Interior, Bureau of Mines, TPR-56
State
WV; PA
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