Drag bit construction
Abstract
A mounting movable with respect to an adjacent hard face has a projecting drag bit adapted to engage the hard face. The drag bit is disposed for movement relative to the mounting by encounter of the drag bit with the hard face. That relative movement regulates a valve in a water passageway, preferably extending through the drag bit, to play a stream of water in the area of contact of the drag bit and the hard face and to prevent such water play when the drag bit is out of contact with the hard face. 4 figs.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7147068
- Patent Number(s):
- 4569558
- Application Number:
- PPN: US 6-516909
- Assignee:
- Univ. of California, Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 25 Jul 1983
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; DRILL BITS; DESIGN; BOREHOLES; HYDRAULIC MINING; JETS; OPERATION; POSITIONING; VALVES; WATER; WELL DRILLING; WORKING FACES; CAVITIES; CONTROL EQUIPMENT; DRILLING; DRILLING EQUIPMENT; EQUIPMENT; FLOW REGULATORS; HYDROGEN COMPOUNDS; MINING; OXYGEN COMPOUNDS; 422000* - Engineering- Mining & Underground Engineering- (1980-)
Citation Formats
Hood, M. Drag bit construction. United States: N. p., 1986.
Web.
Hood, M. Drag bit construction. United States.
Hood, M. Tue .
"Drag bit construction". United States.
@article{osti_7147068,
title = {Drag bit construction},
author = {Hood, M},
abstractNote = {A mounting movable with respect to an adjacent hard face has a projecting drag bit adapted to engage the hard face. The drag bit is disposed for movement relative to the mounting by encounter of the drag bit with the hard face. That relative movement regulates a valve in a water passageway, preferably extending through the drag bit, to play a stream of water in the area of contact of the drag bit and the hard face and to prevent such water play when the drag bit is out of contact with the hard face. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {2}
}
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