Variable length three-cone rock bit nozzles

Patent · Tue May 19 04:00:00 EDT 1987

OSTI ID:6437889

Shoemaker, K S

A three-cone sealed bearing rock bit is described of the type that utilizes drilling fluid during operation of the rock bit in an earth formation comprising: a rock bit body having a first pin end and a second cutting end. The cutting end consists of rotary cones mounted to journals that are cantilevered radially inwardly from legs extending from the rock bit body; a fluid chamber formed by the body. The fluid chamber is opened at the first pin end of the body; and at least three variable length nozzle bodies positioned about 120/sup 0/ one from the other, extend from a dome portion formed at a base of the bit body toward a bottom of a borehole in the earth formation. Each of the nozzle bodies communicates with the fluid chamber in the body and extends a different length from the dome portion.

• Assignee: NOV; NOV-87-063210; EDB-87-107111
• Patent Number(s): US 4665999
• OSTI ID: 6437889
• 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)
BOREHOLES
CAVITIES
DETRITUS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLUID FLOW
FLUIDS
NATURAL GAS WELLS
NOZZLES
OIL WELLS
POSITIONING
ROCKS
SEALS
TURBULENT FLOW
WELL DRILLING
WELLS