Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

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

Authors
Kravits-SJ; Sainato-A; Finfinger-GL
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8933, 1985 Jan; :1-31
NIOSHTIC No.
10004416
Abstract
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.
Keywords
Mining-industry; Coal-mining; Underground-mining; Methanes; Methane-drainage; Methane-control; Explosive-gases; Explosive-atmospheres
CAS No.
74-82-8
Publication Date
19850101
Document Type
IH; Report of Investigations
Fiscal Year
1985
NTIS Accession No.
PB85-198224
NTIS Price
A03
Identifying No.
RI-8933
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8933
State
PA
TOP