Drag bit construction

Patent · Tue Feb 11 00:00:00 EST 1986

OSTI ID:7147068

Hood, M

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.

• DOE Contract Number: AC03-76SF00098
• Assignee: Univ. of California, Berkeley, CA (United States)
• Patent Number(s): US 4569558; A
• Application Number: PPN: US 6-516909
• OSTI ID: 7147068
• Resource Relation: Patent File Date: 25 Jul 1983
• Country of Publication: United States
• Language: English

Related Subjects

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-)