Patent ID: 7434623

Claim:
A method of cementing a casing string within a well bore, said casing string forming an annulus within the well bore, the method comprising: providing a device at the end of the casing string, the device comprising: a first member having an internal bore, said internal bore having a first profile, and wherein said first member contains an anvil face; a second member disposed within the internal bore, said second member having a second profile thereon, and wherein said second member contains a hammer face; flowing a cement slurry through the first member and the second member; vibrating the cement slurry, wherein the step of vibrating the cement slurry includes: rotating the second member by flowing the cement slurry there through; engaging the first profile with the second profile so that the second member travels in a direction opposite the flow of the cement slurry; continuing to rotate the second member by flowing the cement slurry there through; engaging the first profile with the second profile so that the second member travels in a same direction as the flow of the cement slurry; flowing the cement slurry through the internal bore of the second member; and flowing the vibrating cement slurry out of a cementing shoe attached to the end of the casing string and into the annulus.