Rotary drill bit with rotary cutters
A rotary drill bit is described having a drill bit body and at least one trunnion projecting from the drill bit body and a rotary cutter supported on at least one radial roller bearing on the trunnion. The rolling elements of the bearing are guided on at least one axial end facing the drill bit body in an outer bearing race groove incorporated in the bore of the rotary cutter. The inner bearing race groove is formed on the trunnion for the rolling elements of the radial roller bearing. At least one filling opening is provided which extends through the drill bit body and trunnion and is essentially axially oriented having one terminal end adjacent the inner bearing race groove and at least one pair of filler piece for sealing the opening. One of the filler pieces is made of an elastically compressible material.
- Assignee:
- Aktiebolaget Skf (Sweden); Sandvik Ab (Sweden)
- Patent Number(s):
- US 4263976
- OSTI ID:
- 5862367
- Country of Publication:
- United States
- Language:
- English
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Rotary drill bit with rotary cutters
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Related Subjects
020300* -- Petroleum-- Drilling & Production
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
BEARINGS
COMPRESSIBILITY
DESIGN
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLS
ELASTOMERS
EQUIPMENT
MATERIALS
MECHANICAL PROPERTIES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
ROLLER BEARINGS
ROTARY DRILLS
RUBBERS
SEALS
SYNTHETIC MATERIALS
WELL DRILLING
WELLS