| US 7,338,135 B1 | ||
| Holder for a degradation assembly | ||
| David R. Hall, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); Ronald Crockett, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); and Jeff Jepson, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US) | ||
| Filed on Aug. 11, 2006, as Appl. No. 11/464,008. | ||
| Application 11/464008 is a continuation in part of application No. 11/463998, filed on Aug. 11, 2006. | ||
| Application 11/463998 is a continuation in part of application No. 11/463990, filed on Aug. 11, 2006, granted, now 7,320,505. | ||
| Application 11/463990 is a continuation in part of application No. 11/463975, filed on Aug. 11, 2006. | ||
| Application 11/463975 is a continuation in part of application No. 11/463962, filed on Aug. 11, 2006. | ||
| Int. Cl. E21C 35/18 (2006.01) | ||
| U.S. Cl. 299—104 [299/107] | 15 Claims |
| 1. A degradation assembly comprising:
an attack tool comprising a body and a shank, the body comprising a wear resistant tip;
the shank being disposed within a bore of a holder secured to a driving mechanism;
the bore of the holder comprises an inner surface comprising a hardness greater than 58 HRc wherein the inner surface is segmented.
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