Rotary Drilling Techniques Used in the Beckley Coalbed

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Rotary Drilling Techniques Used in the Beckley Coalbed

Public Domain

01/01/1989

Details

Description:

The U.S. Bureau of Mines used a contact drilling strategy with short-collared assemblies in order to rotary drill long horizontal methane drainage holes in the Beckley coalbed near Glen Daniel, West Virginia. By decreasing the thrust and increasing the ...
Document Type:

Report
CIO:

NIOSH
Division:

NIOSH Mining
Location:

North America
NIOSHTIC Number:

nn:na
Collection(s):

National Institute for Occupational Safety and Health
Main Document Checksum:

urn:sha-512:c374b95f1df6caf145892d39bbabd400ed342bd17c4cb5d81ae1502944a7a55566002852df6e91e780cdee5df72746e7275a7e0b36b76897ff228e07d84783ca
Download URL:

https://stacks.cdc.gov/view/cdc/161645/cdc_161645_DS1.pdf
File Type:

[PDF - 951.64 KB ]

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