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US 4,727,943 AGranted
Rotary drill bit
OwnerRoy W. Woodinventor
Life of this patent
Estimating the term…
Abstract
A drill bit for drilling into earth formations comprising a plurality of sections having connection means to connect said sections to form a unitary drill bit; means in said plurality of sections for storing and delivering lubricants to the cutting cones; and wear bar segments on said plurality of sections to form continuous wear bars about the periphery of said unitary drill bit thus reducing the wear on said unitary drill bit.
Claims14
A drill bit having cutting cones for drilling into earth formations comprising:
- a plurality of helical sections having connecting means to connect said helical sections to form a unitary drill bit;
- means in said helical sections for storing and delivering lubricants to said cutting cones;
- and
- wear bar segments on said helical sections for forming a plurality of continuous parallel wear bars about the periphery of said unitary drill bit.
1 more element
A drill bit having cutting cones for drilling into earth formations comprising:
- a plurality of sections having connection means to connect said sections to form a unitary drill bit;
- said plurality of sections comprising helical, spiral sections;
- means in said plurality of sections for storing and delivering lubricants to the cutting cones;
- and
- wear bar segments on said plurality of sections to form continuous wear bars about the periphery of said unitary drill bit thus reducing the wear on said unitary drill bit.
2 more elements
A drill bit having cutting cones comprising:
- a plurality of helical, spiral sections connected together to form a unitary drill bit;
- said spiral sections separable to repair damage due to extensive use;
- recesses in said sections for receiving grease tubes for delivering grease to said cutting cones;
- and
- a plurality of integrally cast wear bar segments on said plurality of helical, spiral sections for forming, when said sections are connected together, continuous reverse spiral wear bars on said unitary drill bit.
2 more elements
Dependencies are inferred from the claim text.