connection 130 at the upper end of the mandrel 102 for threadably engaging to an upper portion of pipe or the like mandrel 102 includes a hammer portion 103 which further comprises an external spline 104 for engaging an internal spline 105 formed on tool 101 for allowing mandrel 102 to move upward and downward relative to the tool 101 and transmit torque through the outer housing of the tool 101 threaded connection 106 provides a means of assembly between the upper portion of mandrel 102 and the next portion of the mandrel there is further provided a spring means 107 which may be a coiled or other type of spring or comprised of a compressible gas or liquid spring means 107 is housed between the outer wall of mandrel 102 and within an internal cylinder 108 of the tool 101 and engaged on its lower end by a piston 113 of the mandrel 102 the upper end of spring means 107 is engaged or contained on a shoulder 132 connection 115 provides assembly joint of the lower end of cylinder 108 there is further provided a seal 114 which maintains spring means 107 isolated from the fluid volumes below it this seal 114 allows spring means 107 to travel or in the case of a compressible gas or liquid be compressed between a compressed state as a high pressure means to its released state as a low.