| US 7,337,858 B2 | ||
| Drill bit assembly adapted to provide power downhole | ||
| David R. Hall, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); and Francis Leany, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US) | ||
| Filed on Mar. 24, 2006, as Appl. No. 11/277,380. | ||
| Application 11/277380 is a continuation in part of application No. 11/306976, filed on Jan. 18, 2006. | ||
| Application 11/306976 is a continuation in part of application No. 11/306307, filed on Dec. 22, 2005, granted, now 7,225,886. | ||
| Application 11/306307 is a continuation in part of application No. 11/306022, filed on Dec. 14, 2005, granted, now 7,198,119. | ||
| Application 11/306022 is a continuation in part of application No. 11/164391, filed on Nov. 21, 2005, granted, now 7,270,196. | ||
| Prior Publication US 2007/0114066 A1, May 24, 2007 | ||
| Int. Cl. E21B 47/00 (2006.01) | ||
| U.S. Cl. 175—40 [175/57; 175/385; 175/382; 175/426] | 21 Claims |
| 1. A drill bit assembly, comprising:
a body portion intermediate a shank portion and a working portion;
the working portion comprising an opening to an axial chamber disposed within the assembly;
the working portion comprising at least one cutting element;
the drill bit assembly further comprising an axial shaft rotationally isolated from the body portion, the shaft being at least
partially disposed within the chamber, and partially protruding from the working portion; and;
the shaft being in communication with an energy adapter disposed within the drill bit assembly; wherein the energy adapter
is adapted to use relative motion between the body portion and the shaft to provide energy to at least one downhole device.
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