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Title: 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}
}