Patent ID: 8230926

Claim:
A cementing tool for cementing a casing in a well comprising: an inner mandrel defining a central flow passage and having at least one fluid port through a wall thereof; an outer mandrel disposed about the inner mandrel, the inner and outer mandrels defining an annular space therebetween, the annular space terminating at an upper end of the outer mandrel to thus form an upper end of the annular space; at least one sealing element disposed about the outer mandrel; an opening sleeve positioned in the inner mandrel movable from a closed position, in which the opening sleeve covers the at least one fluid port to an open position in which the at least one fluid port is not covered by the opening sleeve, and an expansion cone positioned in the annular space between the inner mandrel and outer mandrel wherein fluid pressure communicated through the at least one fluid port from the central flow passage will force the expansion cone through at least a portion of the annular space to cause the outer mandrel to plastically deform radially outwardly so that the at least one sealing element engages the well and the fluid pressure will expel the expansion cone through the upper end of the annular space so that cement may be displaced through the central flow passage, the fluid port and the annular space into the well to cement at least a portion of the casing.