Earth boring bit with improved rigid face seal assembly

Patent · Tue May 19 00:00:00 EDT 1987

OSTI ID:6391410

Burr, B H

An earth boring bit is described with an improved pressure compensating face seal assembly having one rigid ring and sealing face carried by a bearing shaft and an opposed sealing face carried by the cutter. The bit comprises: a body; a cantilevered bearing shaft having a generally cylindrical journal bearing and positioned to extend obliquely inwardly and downwardly from the body; a cutter having a generally cylindrical bearing formed internally therein, secured for rotation about the journal bearing of the shaft; a lubrication system in the body, including a hydrostatic pressure compensator to lubricate the bearings; and a cutter seal groove formed near the outermost region of the cylindrical bearing in the cutter to have a circumferential, generally cylindrical wall.

• Assignee: Hughes Tool Company USA, Houston, TX
• Patent Number(s): US 4666001
• OSTI ID: 6391410
• Resource Relation: Patent File Date: Filed date 13 May 1985
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
42 ENGINEERING
DRILL BITS
SEALS
WELL DRILLING
HYDROSTATICS
JOURNAL BEARINGS
LUBRICATION
NATURAL GAS WELLS
OIL WELLS
POSITIONING
PRESSURE CONTROL
SHAFTS
BEARINGS
CONTROL
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
MACHINE PARTS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)