Replaceable bit nozzle

Patent · Tue Aug 05 04:00:00 EDT 1986

OSTI ID:5267943

Sorenson, R B

This patent describes an earth boring bit having at least one passage for discharging drilling fluid. The improvement described here consists of in combination: a lower counterbore selection in the nozzle passage extending from the lower end of the passage upwardly, terminating in a downwardly facing lower shoulder; an upper counterbore section in the passage extending upwardly from the lower shoulder and terminating in a downwardly facing upper shoulder; a threaded section formed in the upper counterbore section having its upper end spaced below the upper shoulder a selected distance; a nozzle having an enlarged lower section for reception in the lower counterbore section and an upper section of the smaller diameter for reception in the upper counterbore section, defining an upwardly facing shoulder for sealing engagement with the lower shoulder formed in the bit passage; the upper section having a threaded section for securing the nozzle to the threaded section formed in the bit passage; and elastomeric seal means surrounding the nozzle upper section above the threaded section for preventing the entry from above of drilling fluid into the threaded section; the sealing engagement of the nozzle shoulder with the lower shoulder preventing entry of drilling fluid from below the threaded section; the length of the nozzle upper section being selected so that a clearance exists between the upper end of the nozzle and the upper shoulder when the nozzle is fully made up, assuring sealing contact of the nozzle shoulder with the lower shoulder.

• Assignee: Hughes Tool Co.-USA, Houston, TX
• Patent Number(s): US 4603750
• OSTI ID: 5267943
• 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)
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
ELASTOMERS
EQUIPMENT
FLUIDS
JOINTS
NATURAL GAS WELLS
NOZZLES
OIL WELLS
POLYMERS
SEALS
THREADED JOINTS
WELL DRILLING
WELLS