Patent ID: 7866392

Claim:
An apparatus for cementing casing in a well, comprising: a housing having an upper end adapted to couple to a lower end of a well casing, the housing having a cementing port extending radially from an inner surface of the housing to an outer surface of the housing, a packer carried on an outer surface of the housing below the cementing port, a packer setting sleeve carried within the housing, the packer setting sleeve coupled to the packer and adapted to set the packer in response to a first pressure applied to the packer setting sleeve, a rupture disk carried in the cementing port, the rupture disk blocking flow through the port when it is intact, and selected to rupture at a second pressure, the second pressure being equal to or greater than the first pressure, a closing sleeve carried within the housing and movable between a first position in which the closing sleeve does not cover the cementing port to a second position in which the closing sleeve covers the cementing port, and a closing sleeve seat carried within the housing, releasably coupled to the closing sleeve, and adapted to move the closing sleeve from the first position to the second position in response to force applied to the closing sleeve seat; and a collet coupled to a lower end of the housing the collet having an expandable portion having an unexpanded inner diameter smaller than the outer diameter of the packer setting sleeve and the closing sleeve seat, the expandable portion being elastically expandable in response to downward movement of the packer setting sleeve and the closing sleeve seat to permit the packer setting sleeve and the closing sleeve seat to be pumped out of the housing, and the collet comprising an outer diameter greater than an inner diameter of the well casing.