| US 7,591,327 B2 | ||
| Drilling at a resonant frequency | ||
| David R. Hall, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); John Balley, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); Matt Kudla, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); and Joe Fox, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US) | ||
| Filed on Mar. 30, 2007, as Appl. No. 11/693,838. | ||
| Application 11/693838 is a continuation in part of application No. 11/686636, filed on Mar. 15, 2007. | ||
| Application 11/686636 is a continuation in part of application No. 11/680997, filed on Mar. 01, 2007, granted, now 7,419,016. | ||
| Application 11/680997 is a continuation in part of application No. 11/673872, filed on Feb. 12, 2007, granted, now 7,484,576. | ||
| Application 11/673872 is a continuation in part of application No. 11/611310, filed on Dec. 15, 2006. | ||
| Application 11/673872 is a continuation in part of application No. 11/693838. | ||
| Application 11/693838 is a continuation in part of application No. 11/278935, filed on Apr. 06, 2006, granted, now 7,426,968. | ||
| Application 11/278935 is a continuation in part of application No. 11/277394, filed on Mar. 24, 2006, granted, now 7,398,837. | ||
| Application 11/277394 is a continuation in part of application No. 11/277380, filed on Mar. 24, 2006. | ||
| 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. | ||
| Application 11/306307 is a continuation in part of application No. 11/306022, filed on Dec. 14, 2005. | ||
| Application 11/306022 is a continuation in part of application No. 11/164391, filed on Nov. 21, 2005. | ||
| Prior Publication US 2007/0221408 A1, Sep. 27, 2007 | ||
| Int. Cl. E21B 7/24 (2006.01) | ||
| U.S. Cl. 175—56 [175/389] | 20 Claims |
| 1. A method for drilling a bore hole, comprising the steps of:
deploying a drill bit attached to a drill string in a well bore, the drill bit comprising an axial jack element with an asymmetric
distal end protruding beyond a working face of the drill bit;
engaging the distal end of the jack element against a formation such that the formation applies a reaction force on the jack
element while the drill string rotates; and
applying a force on the jack element that opposes the reaction force such that the jack element vibrates and causes the formation
to vibrate and degrade that formation;
wherein the jack element is rotationally isolated from the drill bit.
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