Drill bit and drill assembly

Patent · Tue Feb 21 04:00:00 EST 1989

OSTI ID:6212607

Johnsey, W F; Drummond, D D

A drill bit is described comprising: a body portion having a hollow interior; a shank portion extending from the body portion for attachment of the drill bit to the drill string and having an opening for receiving the gaseous fluid flow from the drill string for conducting the flow into the hollow interior of the body portion, the body portion having at least one leg portion extending from the body portion; at least one cutting cone supported on the leg portion by bearings; a discharge opening within the body communicating with the hollow interior for exhausting gaseous fluid from the hollow interior onto the surface being drilled; at least one conduit extending through the leg portion providing a passage between the hollow interior of the body portion and the cutting cone bearings, the conduit receiving a gaseous fluid flow from the interior of the body portion; and a second conduit communicating with the first conduit at a junction and extending through the body portion providing passage means for the lubricant, and communicating at one end with the forced flow of lubricant from the lubricant supply means and at the other end with the first conduit means at the junction.

• Assignee: Drumco, Jasper, AL
• Patent Number(s): US 4805709
• OSTI ID: 6212607
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CONTROL
DESIGN
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
DRILLS
EQUIPMENT
FLUID FLOW
FLUID MECHANICS
FLUIDS
GASES
HYDRAULICS
LUBRICANTS
MECHANICS
NATURAL GAS WELLS
OIL WELLS
PIPES
PRESSURE CONTROL
ROCK DRILLING
WELLS
WORKING FLUIDS