| US 7,467,673 B2 | ||
| Rotary vector gear for use in rotary steerable tools | ||
| Ronald G. Earles, Houston, Tex. (US); and Jeffrey B. Lasater, Houston, Tex. (US) | ||
| Assigned to Halliburton Energy Services, Inc., Houston, Tex. (US) | ||
| Appl. No. 10/597,481 PCT Filed Jan. 28, 2005, PCT No. PCT/US2005/003520 § 371(c)(1), (2), (4) Date Jul. 27, 2006, PCT Pub. No. WO2005/099424, PCT Pub. Date Oct. 27, 2005. |
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| Claims priority of provisional application 60/539834, filed on Jan. 28, 2004. | ||
| Prior Publication US 2008/0190665 A1, Aug. 14, 2008 | ||
| Int. Cl. E21B 7/06 (2006.01) | ||
| U.S. Cl. 175—82 [464/109] | 21 Claims |
| 1. A rotary vector gear for sequencing a controlled axis about a reference axis, comprising:
a concentric drive sleeve adapted to rotate about the reference axis;
a first stage eccentric sleeve connected to said driven inner sleeve;
a second stage eccentric sleeve adapted to rotate about the controlled axis;
an external tooth cycloid disc attached to said second stage eccentric;
an internal tooth stationary cycloid ring adapted to be attached to an outer housing for retaining the cycloid system; and,
drive means for rotating said concentric drive sleeve.
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