Rotary drill bit

Patent · Tue Feb 03 00:00:00 EST 1987

OSTI ID:7062848

Dennis, M D

A rotary drill bit is described for cutting in earth formations, comprising: a bit body including a cutting face having an outer peripheral edge and a central recess extending longitudinally inwardly from the peripheral edge, bores formed in the cutting face and containing nozzles for emitting drilling fluid under pressure, cutter elements, some of which being mounted in the peripheral edge, and others of which being mounted in the recess to fracture an earthen core formed as the drill cuts through the formation, the cutter elements including cutting faces facing in a direction defining a direction of rotation of the drill bit, lateral discharge passages formed in the body, the passages extending radially through the body from the recess and extending longitudinally to the peripheral edge to form circumferential interruptions in the peripheral edge, a convex protrusion disposed centrally at a longitudinally inner end of the recess for deflecting cuttings to the lateral discharge passages, the cutting face including a groove extending in the direction of rotation from one side of an outer end of each bores and terminating at the nearest discharge passage for conducting cuttings from the bore to that passage.

• Assignee: Strata Bit Corp., Houston, TX
• Patent Number(s): US 4640374
• OSTI ID: 7062848
• Resource Relation: Patent File Date: Filed date 3 Sep 1985
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
42 ENGINEERING
DRILL BITS
DESIGN
OPERATION
WELL DRILLING
ROTARY DRILLS
DRILLING FLUIDS
NATURAL GAS WELLS
NOZZLES
OIL WELLS
PRESSURIZING
ROTATION
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
FLUIDS
MOTION
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)