Keyseat Wiper

Abstract

Embodiments of keyseat wipers for use in drilling processes, as well as methods for making and using such keyseat wipers, are described herein. Embodiments of keyseat wipers can include changing cross-sections and a relief sections that permit cut materials to pass by the keyseat wipers, reducing the possibility of a drill string with keyseat wipers from binding in a curved hole when being retrieved.

1 . A keyseat wiper for placement in a drill string, the keyseat wiper comprising:
 a first tapered section tapering from a first diameter to a second larger diameter;   a wiper section having the second larger diameter;   a second tapered section tapering from the second larger diameter to the first diameter; and   a reduced section in the wiper section, the reduced section having a diameter smaller than the second larger diameter.   
     
     
         2 . The keyseat wiper of  claim 1 , wherein the first tapered section and the second tapered section each include flutes, the flutes of the first tapered section being rotationally offset from the flutes of the second tapered section. 
     
     
         3 . The keyseat wiper of  claim 1 , further comprising at least one outside reduced section located adjacent to the first diameter of the first tapered section.