Percussion tool and method

A downhole tool for delivering an impact to a tubular string comprising:

• a cylindrical member having an internal bore, said internal bore having a first anvil and a first internal profile and a first anvil therein;
• a first rotor disposed within the internal bore, said first rotor comprising a cylindrical body having an outer circumference with a first external profile thereon, and wherein said first rotor contains a first radial hammer face, and wherein said first rotor contains an internal portion for receiving a flow stream;
• wherein said first external profile of said first rotor cooperates with said first internal profile of said cylindrical member in a lowered position so that said first radial hammer face contacts said first anvil;
• wherein said first profile of said first rotor cooperates with said first internal profile of said cylindrical member in a raised position so that said first radial hammer face is separated from said first anvil.

A tool for delivering an impact comprising:

• a cylindrical member having an internal bore, said internal bore containing an anvil and a first profile;
• a first rotor disposed within the internal bore, and wherein said first rotor member comprises a body having an outer circumference with a second profile thereon, and wherein said first rotor contains a first radial hammer face;
• wherein said second profile of said first rotor engages with said first profile of said cylindrical member so that said first radial hammer face contacts said anvil;
• wherein said second profile of said first rotor engages with said first profile of said cylindrical member so that said first radial hammer face is separated from said anvil.

A method of delivering an impact to a bit connected to a tubular string within a well bore comprising:

• providing a down hole device for delivering the impact to the bit, the device comprising:
• a cylindrical member having an internal bore, said internal bore having a first profile;
• a rotor disposed within the internal bore, said rotor comprises a body having an outer circumference with a second profile thereon, and wherein said rotor contains a radial hammer face;
• flowing a flow stream down the internal bore;
• flowing the flow stream through the rotor;
• rotating the rotor by flowing the flow stream there through;
• engaging the first profile with the second profile so that the rotor travels in a direction opposite the flow of the flow stream;
• continuing to rotate the rotor by flowing the flow stream there through;
• engaging the first profile with the second profile so that the rotor travels in the same direction as the flow of the flow stream;
• impacting the radial hammer face against the bit.

A method of delivering an impact to a tubular string comprising:

• providing a first device for delivering the impact to the tubular string, the first device comprising:
• a first member having an anvil shoulder within an internal bore;
• a first internal helical profile disposed within said internal bore;
• and, a first rotor having a first external helical profile engaging said first internal helical profile;
• flowing a flow stream down the internal bore;
• flowing the flow stream through an internal bore having a plurality of blades of the first rotor;
• rotating the first rotor;
• engaging the first external helical profile of said first rotor with the first internal helical profile of said first member so that the first rotor travels up;
• continuing to rotate the first rotor;
• continuing to engage the first external helical profile of said first rotor with the first internal helical profile of said first member so that the first rotor travels down;
• impacting a first radial hammer face located on said first rotor against a first anvil shoulder located on said first member.

A tool for delivering an alternating force comprising:

• a first member having an opening, said first member having a first area thereon, and said first member having a first profile;
• a second member disposed within the opening of said first member, said second member having a second profile, and wherein said second member contains a second area;
• wherein said second member has a first position relative to said first member wherein said first profile cooperates with said second profile so that said second area contacts said first area;
• wherein said second member having a second position relative to said first member wherein said first profile cooperates with said second profile so that said second area is separated from said first area;
• wherein said second member is a rotor, and wherein said rotor contains a plurality of blades disposed about a center core and wherein said plurality of blades turn in response to a flow stream flowing there through.

A tool for delivering an alternating force comprising:

• a first member having an internal bore, and said first member having a first profile;
• a second member disposed within the internal bore of said first member, and said second member having a second profile;
• wherein the first profile and the second profile cooperate for the second member to move in a linear motion when moving in the same direction of a flow stream flowing down the internal bore, and the second member rotates when moving in a linear motion opposing the direction of the flow stream flowing down the internal bore;
• wherein said second member contains a plurality of blades disposed about a center core and wherein said plurality of blades turn in response to the flow stream flowing down the internal bore.