Sealed and lubricated rock bit with air protected seal ring

Patent · Tue Mar 01 00:00:00 EST 1983

OSTI ID:6308794

Galle, E M

An earth boring rock bit having a sealed bearing and pressure lubrication system for drilling the earth with air or gas as the circulating medium. An annular groove is formed in the vicinity of the seal and connected to the interior of the bit for cooling the ring and cleaning debris from the area of the ring. The air pressure inside the bit is utilized to bias a movable element in the system to urge lubricant to the bearing.

• Assignee: Hughes Tool Co
• Patent Number(s): US 4375242
• OSTI ID: 6308794
• Resource Relation: Patent File Date: Filed date 11 Aug 1980; Other Information: PAT-APPL-177292
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DRILL BITS
OPERATION
SEALS
ROCK DRILLING
AIR
HYDROSTATICS
LUBRICATION
PRESSURIZING
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
FLUIDS
GASES
420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)