Abstract: A stand-alone packer has a compressible packer element having an upper end and a lower end disposed about a packer body. A setting sleeve is disposed about the packer body above the compressible packer element. A packer stop having a flat annular upper face is positioned on the packer body below the compressible packer element and a sliding sleeve is disposed in the packer body and detachably connected to the setting sleeve.

Abstract: A stage cementing tool for a wellbore comprises a tool body defining a flow port in a wall thereof. The tool body and wellbore define an annulus therebetween. A setting sleeve compresses a packer element as it moves from the first to the second position. The packer element expands radially outwardly to engage the wellbore as a result of the compression applied by the setting sleeve. A pump-out plug in the tool body is expellable into the annulus upon the application of pressure in the tool body after the packer element engages the wellbore.

Abstract: A stage cementing tool for a wellbore comprises a tool body defining a flow port in a wall thereof. The tool body and wellbore define an annulus therebetween. A setting sleeve compresses a packer element as it moves from the first to the second position. The packer element expands radially outwardly to engage the wellbore as a result of the compression applied by the setting sleeve. A pump-out plug in the tool body is expellable into the annulus upon the application of pressure in the tool body after the packer element engages the wellbore.

Abstract: A single sleeve, multi-stage cementing tool for cementing in a wellbore can include a tool body, an outer mandrel, a flow port for providing fluid communication transversely from the inside of a tubing string into an annulus, and a port plug. The port plug is located within the flow port during first stage cementing such that the cement flows into the annulus from a bottom of the tubing string. The bottom of the tubing string can be closed after the first stage, and the port plug can be released from the flow port by increasing pressure within the tubing string. Second stage cementing can then be performed such that the cement flows into the annulus directly through the opened flow port. After all cement stages have been completed, a closing sleeve can be shifted to close the flow port.

Abstract: A single sleeve, multi-stage cementing tool for cementing in a wellbore can include a tool body, an outer mandrel, a flow port for providing fluid communication transversely from the inside of a tubing string into an annulus, and a port plug. The port plug is located within the flow port during first stage cementing such that the cement flows into the annulus from a bottom of the tubing string. The bottom of the tubing string can be closed after the first stage, and the port plug can be released from the flow port by increasing pressure within the tubing string. Second stage cementing can then be performed such that the cement flows into the annulus directly through the opened flow port. After all cement stages have been completed, a closing sleeve can be shifted to close the flow port.