Patent ID: 7225881

Claim:
An assembly for converting kinetic energy in a downward-moving borehole logging sonde to rotational energy in an augering device in order to urge said logging sonde to bypass sidewall obstructions while running in an earth borehole, comprising: (a) the logging sonde; (b) the augering device comprising: (i) an augering tool; (ii) a means of temporarily storing said kinetic energy as potential energy during the compression of said angering tool by said sidewall obstruction; and (iii) a spiral gear assembly; (c) a means of connecting said augering device to the bottom, leading end of said logging sonde, and (d) a means of connecting said augering tool, said spring, and said spiral gear together as the augering device, with said augering tool being placed at the bottom end of the augering device such that upon striking any of said sidewall obstructions, said augering tool is pushed rearward along said spiral gear and against the means for storing kinetic energy as potential energy, thereby inducing said augering tool to rotate using kinetic energy thus transferred from the downward momentum of said logging sonde, in such a manner so as to pull said downward-moving logging sonde past said sidewall obstruction, whereby said stored potential energy subsequently urges said augering tool to return to its initial extended position after said sidewall obstruction has been bypassed and resisting force on said augering tool has lessened.