Seal and bearing apparatus for bits
This patent describes an improved bit for drilling well bores and the like, wherein the bit includes an arm member having a journal bearing pin projecting therefrom and a cutter member having a bore larger than the pin for receiving the pin and forming a seal and bearing space therebetween. The improvement described here comprises seal and bearing means located in the space for rotatably supporting the cutter member of the pin, the seal and bearing means including: a helical spring bearing member located in the space and encircling the pin member; and, annular seal means located in the space between the helical spring bearing member and the arm member. The helical spring bearing member and annular seal means have an unstressed axial length parallel to the pin that is greater than the length of the seal and bearing space provided therein, whereby the helical spring bearing member is compressed into the space and exerts a force on the seal means urging the seal means into sealing engagement with the arm member.
- Assignee:
- Dresser Industries, Inc., Dallas, TX
- Patent Number(s):
- US 4629338
- OSTI ID:
- 6929703
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ANNULAR SPACE
BEARINGS
COMPRESSION
CONFIGURATION
CUTTING TOOLS
DESIGN
DRILL BITS
DRILLING
DRILLING EQUIPMENT
ELEMENTS
EQUIPMENT
JOURNAL BEARINGS
MACHINE PARTS
METALS
MOTION
NATURAL GAS WELLS
OIL WELLS
ROTATION
SEALS
SPACE
SPRINGS
TOOLS
WELL DRILLING
WELLS