Earth boring bit with bearing sleeve
An earth boring bit is described having an improved bearing sleeve and cutter retention means which comprises: a bit body which includes at least one leg and a cantilevered bearing lug that extends downwardly and inwardly; a thread formed on the bearing lug, tapered to diverge outwardly from an inner, end region to an outer, base region having a transverse shoulder; a bearing sleeve with a substantially cylindrical bearing surface secured to the bearing lug, having a mouth at one end and a threaded portion, the mouth engaging respectively the transverse shoulder; the bearing sleeve having a length greater than that of its threaded portion to define a thick walled end region; a rotatable cutter with a cylindrical bearing surface assembled on the bearing sleeve; an assembly groove formed on the cylindrical surface of the bearing sleeve and in the thick walled end region at a location removed from the thread of the bearing lug and threaded portion of the bearing sleeve; a mating, retainer groove formed in the rotatable cutter; a resilient snap ring positioned in the mating assembly and retainer grooves to retain the cutter on the bearing shaft.
- Assignee:
- Hughes Tool Co., Houston, TX
- Patent Number(s):
- US 4600064
- OSTI ID:
- 5300247
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
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& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
DESIGN
DRILL BITS
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
JOINTS
MACHINE PARTS
NATURAL GAS WELLS
OIL WELLS
OPERATION
SHAFTS
THREADED JOINTS
WELL DRILLING
WELLS