Drill bit having offset roller cutters and improved nozzles

Patent · Tue Sep 16 04:00:00 EDT 1986

OSTI ID:5375998

Childers, J S; Pastusek, P E; Schumacher, Jr, P W

A rotary drill bit is described for drilling a well bore, the bit comprising: a bit body adapted to be detachably secured to a drill string for rotating the bit and to receive drilling fluid under pressure from the drill string, the bit body having a plurality of spaced apart, depending legs at its lower end, and a plurality of nozzles, one for each of the legs, for exit of the drilling fluid from the bit body; and roller cutters, one for each of the legs, rotatably secured to the legs at the lower end thereof, each roller cutter comprising a generally frusto-conical cutter body and a plurality of powder metallurgy composite cutting elements on the cutter body; and each of the nozzles having passaging therein directing the drilling fluid under pressure to flow downwardly in a stream angled relative to the longitudinal axis of the bit body and generally toward the underside of one of the roller cutters.

• Assignee: Reed Bit Co., Houston, TX
• Patent Number(s): US 4611673
• OSTI ID: 5375998
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
DESIGN
DRAG
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUIDS
INCIDENCE ANGLE
MOTION
NATURAL GAS WELLS
NOZZLES
OIL WELLS
PIPES
PRESSURE EFFECTS
ROTARY DRILLING
ROTATION
SPACE DEPENDENCE
WELLS