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

An Abrasive Jet Borehole Miner.

Authors
Savanick-GA
Source
Paper in Proceedings of the 6th American Water Jet Conf 1991 :14 pages
Link
NIOSHTIC No.
10011073
Abstract
The U.S. Bureau of Mines has designed, built, and tested an abrasive jet borehole miner for hard rock. It integrates an abrasive jet cutter with a downhole slurry pump and is in the form of an assembly that is suspended in a well and is rotated by a turntable at the well head. This device generates a 68.9-Mn/m2, 75.7-Lpm (10,000- psi, 20-gpm) collimated jet containing 7.26 Kg/min (16 lb/min) of abrasive. This jet erodes the rock in the borehole wall and forms a slurry. The addition of the abrasive greatly enhances the erosive power of a 68.9-Mn/m2, 75.7-Lpm (10,000-psi, 20-gpm) jet of water without abrasives. The slurry is pumped to the surface by a downhole eductor. The abrasive jet borehole miner was tested in a simulated well in the laboratory and in a taconite mine. Samples of charcoal granite, Duluth Gabbro, and Sioux quartzite were cut, and the cuttings were pumped in the laboratory. Taconite was cut and pumped from a borehole in an open pit mine.
Publication Date
19910101
Document Type
OP;
Editors
Labus-TJ;
Fiscal Year
1991
NTIS Accession No.
NTIS Price
Identifying No.
OP 224-91
NIOSH Division
TCRC;
Source Name
Paper in Proceedings of the 6th American Water Jet Conf., Ed. by T. J. Labus
TOP