Abstract: In one aspect of the invention, a downhole drill string component has a shaft being axially fixed at a first location to an inner surface of an opening in a tubular body. A mechanism is axially fixed to the inner surface of the opening at a second location and is in mechanical communication with the shaft. The mechanism is adapted to elastically change a length of the shaft and is in communication with a power source. When the mechanism is energized, the length is elastically changed.
Type:
Grant
Filed:
November 1, 2006
Date of Patent:
September 2, 2008
Inventors:
David R. Hall, Scott Dahlgren, Tyson J. Wilde