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US 7,410,221 B2Granted
Retainer sleeve in a degradation assembly
OwnerDavid R. Hall, Ronald Crockett +2inventors
InventorsDavid R. Hall, Ronald Crockett, Jeff Jepson, Tyson J. Wilde
Life of this patent
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Abstract
A degradation assembly has an attack tool with a body and a shank. The body has a wear resistant tip with a hardness of at least 60 HRc. The shank is disposed within a bore of a holder secured to a driving mechanism. A retainer sleeve is disposed around the shank of the attack tool, wherein an annular gap of 0.002 to 0.010 inches exists between at least a portion of the sleeve and the shank.
Claims16
A degradation assembly comprising:
- an attack tool comprising a body and a shank, the body comprising a wear resistant tip comprising a hardness of at least 60 HRc;
- the shank being disposed within a bore of a holder secured to a driving mechanism;
- and
- a retainer sleeve disposed around the shank of the attack tool, the retainer sleeve comprising an inner surface with a carbide thickness of 0.0001 and 0.5 inches;
- and
- a seal between the shank and the sleeve disposed proximate the rearward end of the shank;
- wherein an annular gap of 0.002 to 0.007 inches exists between at least a portion of the sleeve and the shank.
4 more elements
A method for manufacturing a degradation assembly comprising:
- providing an attack tool comprising a body and a shank, a holder comprising a bore, and a retainer sleeve;
- adding a carbide material of a thickness of 0.0001 to 0.5 inches to an inner surface of the retainer sleeve;
- adding a seal between the shank and the sleeve proximate a rearward end of the shank;
- fitting the retainer sleeve around the shank of the attack tool, wherein an annular gap of 0.002 to 0.007 inches exists between at least a portion of the sleeve and the shank;
- and
- inserting the shank and the retainer sleeve into the bore of the holder such that the retainer sleeve retains the shank within the bore.
3 more elements
Dependencies are inferred from the claim text.