and flowpaths 76 will provide fluid communication between the volume 74 and the wellbore external to the dampener 70 referring additionally now to fig9 another pressure wave dampener 82 is representatively illustrated the dampener 82 may be used for the dampener 30 in the method 10 however it should be understood that the dampener 82 may be used in other methods without departing from the principles of the invention the dampener 82 acts by viscously damping the pressure waves traveling through an annulus 84 formed between the wellbore 14 and the tubing string 12 the dampener 82 includes whiskers or fibers 86 extending outwardly from a central axially extending mandrel 88 preferably the fibers 86 contact the wellbore 14 in which case the fibers may be deployed after the dampener 82 is conveyed into the well for example by removing a shroud not shown initially constraining the fibers removal of the shroud enables the fibers 86 to extend outward into contact with the wellbore 14 the fibers 86 may be made of any material including steel other metals plastics composites etc the fibers 86 may be made of a phase change alloy in which case the pressure waves traveling through the fibers induce strain in the fibers.